RAM 712 KNX room thermostat for surface-mounted and flush-mounted installation

RAM 712 KNX room thermostat for surface-mounted and flush-mounted installation RAM 712 712 9 200 Version: Dec-10 (subject to change) Page 1 of 65

Contents 1 Functional characteristics... 4 1.1 Operation... 5 1.2 Benefits of RAM 712... 5 1.2.1 Special features... 5 2 Technical data... 6 2.1 General... 6 3 RAM 712 V1.0 application program... 7 3.1 Selection in the product database... 7 3.2 Parameter pages... 7 3.3 Communication objects... 8 3.3.1 Object characteristics... 8 3.3.2 Description of objects... 11 3.4 Parameters... 17 3.4.1 Settings... 17 3.4.2 Heating control... 18 3.4.3 Setpoint values... 20 3.4.4 Actual value... 23 3.4.5 Cooling control... 24 3.4.6 Operating mode... 27 3.4.7 Cooling setpoint values... 29 3.4.8 Inputs E1, E2... 30 4 Start-up... 41 4.1 Installation in a flush-mounted socket... 41 4.2 Actuators to control heating and cooling... 42 4.2.1 Heating control variable... 42 4.2.2 Cooling control variable... 42 5 Typical applications:... 43 5.1 The school environment: Heating with presence detector and frost protection via window contact.... 43 5.1.1 Description... 43 5.1.2 Devices:... 43 5.1.3 Overview... 44 5.1.4 Objects and links... 45 5.1.5 Important parameter settings... 46 6 Appendix... 48 6.1 Determining the current operating mode... 48 6.1.1 New operating modes... 48 6.1.2 Old operating modes... 49 6.1.3 Determining the setpoint value... 50 6.2 Setpoint offset... 52 6.3 Base setpoint value and current setpoint value... 53 6.4 The scenes... 54 6.4.1 Principle... 54 6.4.2 Saving scenes:... 55 6.4.3 Calling scenes:... 56 6.5 External interface... 57 6.5.1 Circuit board... 57 Version: Dec-10 (subject to change) Page 2 of 65

6.5.2 External sensor... 58 6.5.3 Suitable actuators... 58 6.6 Temperature control... 59 6.6.1 Introduction... 59 6.6.2 Response of the P-control... 60 6.6.3 Response of the PI control... 61 7 Glossary... 62 7.1 Continuous and switching control... 62 7.2 Hysteresis... 62 7.2.1 Negative hysteresis:... 62 7.2.2 Positive hysteresis... 63 7.3 Dead zone... 63 7.3.1 Case 1: Heating and cooling with continuous control... 63 7.3.2 Case 2: Heating with 2-point control and cooling with continuous control... 64 7.3.3 Case 3: Heating with continuous control and cooling with 2-point control... 64 7.3.4 Case 4: Heating and cooling with 2-point control... 64 7.3.5 Setpoint value calculation... 65 Version: Dec-10 (subject to change) Page 3 of 65

1 Functional characteristics The RAM 712 room thermostat is a KNX controller for heating and cooling operation with 2 binary inputs (see appendix: External interface) that can be controlled both continuously and in 2 point operating mode. It measures the current room temperature (actual value) via a sensor and sends either a continuous control variable (0...100%) or a switching command (On/Off) to an actuator or heating actuator to achieve the desired room temperature (setpoint value). This device is primarily ideal for use in public buildings, including schools for example, thanks to its elegant design, the absence of control elements, its robust structure and its excellent price performance ratio. The option of installing the device in a flush-mounted socket allows it to be integrated in switching programmes of choice. Using the binary inputs, switches and keys (floating) can be connected to switch, dim and control blinds. The blinds and dimmer channels can also be controlled with a single key (single key operation). Possible actuators include: Cheops drive, HMG 4, HMT 6, HMT 12 The RAM 712 has four operating modes that allow setpoint values to be easily adapted to requirements for living comfort and saving energy: Comfort Standby Night mode Frost protection mode A setpoint value is assigned to each operating mode. Comfort mode is used when the room is occupied The setpoint value is reduced slightly in standby mode. This operating mode is used when the room is not occupied but is expected to be shortly. The setpoint value is drastically reduced in night mode as the room is not expected to be occupied for several hours. In frost protection mode, the room is controlled to a temperature that eliminates the risk of damage to the radiators caused by freezing due to low outdoor temperatures. This may be required for 2 reasons: - The room is not occupied for several days. - A window has been opened and no further heating is required for the time being. The operating modes are usually controlled by a timer. However, a presence detector and/or presence keys and window contacts are recommended for optimum control. See Determining the setpoint value chapter. Version: Dec-10 (subject to change) Page 4 of 65

1.1 Operation RAM 712 has no control elements. All parameters are preset via ETS. Operating mode and setpoint value specification can be controlled via the bus; see Object characteristics. 1.2 Benefits of RAM 712 Continuous P / PI or switching room thermostat Temperature sensor can be sited as required Operating mode change via presence and window objects Heating and cooling operation Infinite regulation through continuous actuating value 2 binary inputs for conventional keys/switches or for blinds / dimmer control Adjustable effect with binary inputs Blinds and dimmers can also be controlled using single key operation 1.2.1 Special features The absence of control elements is primarily suited to public buildings, for example schools. Very small dimensions; can be installed in a flush-mounted socket Single key operation allows the 2 external connections to control one set of blinds or a dimmer Both external connections can be used for LED control if required. Version: Dec-10 (subject to change) Page 5 of 65

2 Technical data 2.1 General Power supply: Bus voltage. Permitted operating temperature: -5 C... + 45 C Current draw from bus voltage: Bus connection: Max 10 ma Bus terminal Protection class: III in accordance with EN 60730-1 Protection rating: IP 20 in accordance with EN 60529 Dimensions: LxWxH 74 x 74 x 28 (mm) Inputs Contact voltage: Contact current: Maximum line length: 3.3 V internal provided 0.1 ma 5 m Version: Dec-10 (subject to change) Page 6 of 65

3 RAM 712 V1.0 application program 3.1 Selection in the product database Manufacturer Product family Product type Program name Theben AG Heating, ventilation, air conditioning Continuous and 2 point controller RTR RAM 712 UP The ETS database can be found on our website: http://www.theben.de 3.2 Parameter pages Table 1 Function Settings Setpoint values Cooling setpoint values Actual value Heating control Cooling control Operating mode Input E1.. E2 Description Selection of control functions, Standard and user-defined settings, activation of the external interface Setpoint value after download, values for night, frost mode etc. Dead zone and temperature increases conditional on the operating mode Send actual value, calibration Type of control, heating parameters etc. Type of control, cooling parameters etc. Operating mode after reset, presence sensor Function of connected contacts, switches, dimmers, blinds. Version: Dec-10 (subject to change) Page 7 of 65

3.3 Communication objects 3.3.1 Object characteristics RAM 712 features 18 communication objects. Some objects can assume various functions depending on their configuration. Table 2 No. Function Object name Type Flags C R W T 0 Defining the setpoint 2 bytes Base setpoint value temperature EIS5 1 Offset Manual setpoint offset 2 bytes EIS5 2 Send actual value Actual value 2 bytes EIS5 3 Operating mode preset Operating mode preset 1 byte KNX 1 = night, 0 = standby Night < - > standby 1 bit EIS 1 4 Input for presence signal Presence 1 bit 1 = Comfort Comfort 1 bit 5 Input for window contact Window position 1 bit 1 = Frost protection Frost / heat protection 1 bit 6 Report current operating mode Current operating mode 1 byte KNX Send current actuating value Heating control variable 1 byte EIS6 7 1 bit Send current actuating value Heating control variable EIS1 Heating and cooling 1 byte Send current actuating value actuating value EIS6 Send current actuating value Heating and cooling 1 bit actuating value EIS1 8 Send control variable Cooling control variable 1 byte EIS6 Send control variable Cooling control variable 1 bit EIS1 9 Heating = 0, cooling = 1 Switchover between heating 1 bit and cooling EIS1 10 Report current setpoint value Current setpoint value 2 bytes EIS5 C R W T Version: Dec-10 (subject to change) Page 8 of 65

Continuation: No. Function Object name Type 11 12 Switching ON/OFF Priority Send value Send temperature value Switching ON/OFF Step / stop Send value Call/save light scene Height position Switching ON/OFF Brighter Darker Brighter / darker DOWN UP UP/DOWN Input 1 switching Input 1 priority Input 1 value Input 1 temperature Input 1 dimming Input 1 blinds Input 1 value Input 1 value Input 1 value Input 1 LED Input 1 dimmer Input 1 blinds 13 Lock Input 1 1 bit EIS 1 2 bit EIS 8 EIS 14 1 byte EIS 5 2 byte 1 bit EIS 1 1 bit EIS 1 1 byte EIS 14 1 byte DTP 18.001 1 byte EIS 6 1 bit EIS 1 4 bit EIS 2 1 bit EIS1 1 bit EIS1 Flags C R W T C R W T Version: Dec-10 (subject to change) Page 9 of 65

Continuation: No. Function Object name Type 14 15 Switching ON/OFF Priority Send value Send temperature value Switching ON/OFF Step / stop Send value Call/save light scene Height position Switching ON/OFF Brighter Darker Brighter / darker DOWN UP UP/DOWN Input 2 switching Input 2 priority Input 2 value Input 2 temperature Input 2 dimming Input 2 blinds Input 2 valuator Input 2 value Input 2 valuator Input 2 LED Input 2 dimmer Input 2 blinds 16 Lock Input 2 lock 17 Scene control Call/save scene 1 bit EIS 1 2 bit EIS 8 EIS 14 1 byte EIS 5 2 bytes 1 bit EIS 1 1 bit EIS 1 1 byte EIS 14 1 byte DTP 18.001 1 byte EIS 6 1 bit EIS 1 4 bit EIS 2 1 bit EIS1 1 bit EIS1 1 byte DTP 18.001 Flags C R W T C R W T Table 3 Number of communication objects 18 Number of group addresses 20 Number of associations 20 Version: Dec-10 (subject to change) Page 10 of 65

3.3.2 Description of objects Objekt 0 "Base setpoint value" The base setpoint value is first specified at start-up and stored in the base setpoint value. It can be reset at any time using object 0 (limited by minimum or maximum valid setpoint value). The object has no write cycles limit. Object 1 "Manual setpoint value adjustment" Setpoint temperature adjustment: The object receives a temperature differential in EIS 5 format. The desired room temperature (current setpoint value) can be adjusted from the base setpoint value by this differential. The following applies in comfort mode (heating): Current setpoint value (object 10) = Base setpoint value + manual setpoint value offset (obj. 1) Values beyond the configured range (maximum or minimum valid setpoint value on the setpoint values parameter page) are limited to the highest or lowest value. Note: The adjustment always relates to the set base setpoint value and not to the current setpoint value. See : Determining the setpoint value Object 2 "Actual value" This object sends the temperature currently being measured by the sensor (if sending via configuration is permitted). The value (60 C) is sent as a signal in the event of a defective sensor or interference on the sensor connection. Version: Dec-10 (subject to change) Page 11 of 65

Object 3 "Operating mode preset"/ "night <-> standby" The function of this object depends on the objects for setting operating mode on the operating mode parameter page. Table 4 Objects for determining the operating mode Operating mode, presence, window status old.: Comfort, night, frost Object function 1 byte object. One of 4 operating modes can be directly activated. 1 = comfort, 2 = standby, 3 = night, 4 = frost protection (heat protection) If another value is received (0 or >4) the comfort operating mode is activated. The details in brackets refer to cooling mode 1 bit object. Night or standby operating mode can be activated. 0=standby 1=night Object 4 "Presence" / "comfort" The function of this object depends on the objects for setting operating mode on the operating mode parameter page. Table 5 Objects for determining the operating mode Operating mode, presence, window status old: Comfort, night, frost Object function Presence: The status of a presence indicator (e.g. sensor, motion detector) can be received via this object. 1 on this object activates the comfort operating mode. Comfort: 1 on this object activates the comfort operating mode. This operating mode takes priority over night and standby modes. Comfort mode is deactivated by sending a 0 to the object. Version: Dec-10 (subject to change) Page 12 of 65

Object 5 "Window position" / "frost/heat protection" The function of this object depends on the objects for setting operating mode parameter on the operating mode parameter page. Table 6 Objects for determining the operating mode Operating mode, presence, window status old: Comfort, night, frost Object function Window position: The status of a window contact can be received via this object. 1 on this object activates the frost / heat protection operating mode. Frost/heat protection: 1 on this object activates the frost protection operating mode. The heat protection mode is activated during cooling. The frost/heat protection operating mode takes top priority. The frost/heat protection mode remains until it is cleared again by entering 0. Object 6 "Current operating mode" Transmits the current operating mode as a 1 byte value (see table). The send response can be set on the operating mode parameter page. Table 7: Coding of HVAC operating modes: Value Operating mode 1 Comfort 2 Standby 3 Night 4 Frost protection/heat protection Version: Dec-10 (subject to change) Page 13 of 65

Object 7 "Heating control variable / heating and cooling control variable" Sends the current heating actuating value (0...100%) or heating or cooling if the output of cooling actuating value parameter has been set to together with heating actuating value. Object 8 "Cooling control variable" Sends the cooling actuating value or switching command to control a cooling surface, fan coil unit etc. The send format, EIS6 or EIS1, depends on the type of control selected (continuous or switching) on the cooling control page. Note: Object 8 is not available: - With the setting heating control only (parameter page settings), as cooling function is not available. - If switchover between heating and cooling via object is selected and the output of cooling actuating value is configured to together with heating actuating value (parameter page: Cooling control). Object 9 "Switching between heating and cooling" This object is used in 2-pipe heating/cooling systems or if automatic switchover between heating and cooling is not required. The cooling operation is forced via 1 and the heating operation via 0. Object 10 "Current set point value" Sends current setpoint value in EIS5 format to the bus. Version: Dec-10 (subject to change) Page 14 of 65

Objects 11, 14 "Switching ON/OFF, priority, send value, temperature value, call/store light scene, send, step / stop, height position, switching LED " To use inputs E1 and E2 the external interface must be configured on the settings, parameter page as active. The function and type of object are dependent on function of input and object type parameters. Table 8 Input function Function Description Switch/key Switching ON/OFF Sends 1 bit switching commands in EIS 1 format Priority Sends priority telegram in 2 bit format Send value Sends a value between 0 and 255 Send temperature Sends a temperature value in 2 byte format value Dimming Switching ON/OFF Switches dimmer on and off Blinds Step / stop Sends 1 bit "UP" or "DOWN" telegrams. Value Valuator short/long Sends 2 different 8 bit values depending on length of time keystroks Value for light Call/save light scene via 8 bit telegram setting Valuator for blinds Sends an 8 bit percentage value for positioning blinds Control LED Receives 1 bit telegram for controlling LED Objects 12, 15 "Brighter, darker, brighter/ darker, UP, DOWN, UP/DOWN, slat position" The function and the type of object also depend on input function parameter. Table 9 Input function Function Description Switch/key Not available Dimming Brighter, darker 4 bit dimming commands for the dimming actuator in EIS 4 format Brighter / darker Blinds UP, DOWN, UP/DOWN 1 bit motion commands for the blinds actuator in EIS 7 format Value for blinds Slat position Sends 1 byte telegram for positioning slats Control LED Not available Version: Dec-10 (subject to change) Page 15 of 65

Objects 13, 16 "Lock" Inputs E1 or E2 are locked via this object. The resulting response can be set individually on the parameter pages. 1 = disabled 0 = cancel lock Object 17 "Scene control" Scenes can be saved or called via this object. The current operating mode is allocated to the selected scene number when saving. Up to 64 different scenes are supported. See appendix: The scenes Version: Dec-10 (subject to change) Page 16 of 65

3.4 Parameters The standard values are in bold. 3.4.1 Settings Table 10 Designation Values Application Control Standard For simple applications User-defined Enables selection of control functions Control functions used User-defined control Function of external interface Heating control only Heating and cooling Inactive Active Heating operation only An additional cooling system can be controlled (object 8). Determines whether external interface is being used. Version: Dec-10 (subject to change) Page 17 of 65

3.4.2 Heating control Table 11 Designation Values Application Type of control Continuous control Infinite control (0.. 100%). 2-point control Switching control (On/Off). See appendix: Continuous and switching control Sets the control parameters Via system type Standard application System type LED function User-defined Radiator heating Underfloor heating Always off With heating ON Professional application: Selfconfigured P/PI control PIcontrol with: Integrated time = 90 minutes Bandwidth = 2.5 k Integrated time = 180 minutes Bandwidth = 4 k LED function on circuit board. LED is not used Should light in heating mode Always ON Sending heating actuating With change of 1 % value With change of 2 % With change of 3 % With change of 5 % With change of 7 % With change of 10 % With change of 15 % Sends heating actuating value Not cyclical, only in the in cycles event of change Every 2 min., every 3 min. Every 5 min., every 10 min. Every 15 min., every 20 min. Every 30 min., every 45 min. Every 60 min., *Change since last transmission Should light permanently After how much % change* in the control variable is the new value to be sent. Small values increase control accuracy but also the bus load. How often is the current heating actuating value to be sent (regardless of changes)? Version: Dec-10 (subject to change) Page 18 of 65

Continuation: Designation Values Application 2-point control Hysteresis of 2 point control Recirculation of hysteresis after switching point 0.3 K, 0.5 K, 0.7 K 1 K, 1.5 K, 2 K 3 K, 4 K, 5 K 6 K None 0.1 K/min 0.2 K/min 0.3 K/min Interval between the switchoff point (setpoint value) and the turn back on point (setpoint value hysteresis). The hysteresis prevents constant switching on/off. Recirculation causes a gradual decrease the hysteresis over time. This increases control accuracy. Proportional band of heating control Integrated time of the heating control User-defined parameters 1 K, 15 K, 2 K, 2.5 K, 3 K 3.5 K, 4 K, 4.5 K 5 K, 5.5 K, 6 K 6.5 K, 7 K, 7.5 K 8 K, 8.5 K Pure P control 15 min., 30 min., 45 min. 60 min., 75 min., 90 min. 105 min., 120 min., 135 min. 150 min., 165 min., 180 min. 195 min., 210 min., 225 min. The hysteresis is equivalent to the programmed value for each switch-off and is gradually reduced by the recirculation process. The hysteresis can reduce to 0 K over prolonged periods of switch-off. At the next switch-on, it is reset to the configured value. Professional setting to adapt the control response to the room. Small values cause large changes in control variables, larger values cause finer control variable adjustment. See appendix: Temperature control See appendix: Response of PI control The integrated time determines the reaction time of the control. It lays down the increase that the output control variable is raised by, in addition to the P share. The I- share remains active for as long as there is a control deviation. The I share is added to the P share. Version: Dec-10 (subject to change) Page 19 of 65

3.4.3 Setpoint values Table 12 Designation Values Application Base setpoint value after 18 C, 19 C, 20 C, Output setpoint value for loading application 21 C, 22 C, 23 C, temperature control. Reduction in standby mode (during heating) Reduction in night mode (during heating) Setpoint value for frost protection operation (during heating) Setpoint value offset only applies 24 C, 25 C 0.5 K, 1 K, 1.5 K 2 K, 2.5 K, 3 K 3.5 K, 4 K 3 K, 4 K, 5 K 6 K, 7 K, 8 K 3 C, 4 C, 5 C 6 C, 7 C, 8 C 9 C, 10 C Only in comfort mode With comfort and standby mode With comfort, standby and night mode Example: with a base setpoint value of 21 C in heating operation and a reduction of 2K, controls RAM 712 at a setpoint value of 21 2 = 19 C By what value should the temperature be reduced in night mode? Preset temperature for frost protection operation in heating mode (Heat protection operation applies in cooling mode). Setpoint value adjustment: Is only considered in the selected mode and is ineffective in all operating modes. Version: Dec-10 (subject to change) Page 20 of 65

Continuation: Designation Values Application Current setpoint value in comfort mode Feedback of current setpoint value via the bus: Sends the current setpoint value in cycles Sends actual value (heating < > cooling) Transmits average value between heating and cooling Not cyclical, only in the event of change The setpoint value actually being controlled is always sent (= current setpoint value). Example with base setpoint value 21 C and dead zone 2K: During heating and cooling, 21 C and base setpoint value + dead zone are sent respectively (21 C + 2K = 23 C) Same value in comfort operation mode during both heating and cooling operation, i.e.: Base setpoint value + half dead zone are transmitted to prevent occupants being inconvenienced. Example with base setpoint value 21 C and dead zone 2K: Mean value= 21 +1K =22 C Although control takes place at 21 C or 23 C How often should the currently valid setpoint value be sent? Only send in the event of a change. Every 2 min,, Every 3 min. Every 5 min., Every 10 min. Every 15 min., Every 20 min. Every 30 min., Every 45 min. Every 60 min. Send cyclically Version: Dec-10 (subject to change) Page 21 of 65

Continuation: Designation Values Application LIMITS Maximum valid setpoint value offset +/- 1 K, +/- 2 K, +/- 3 K, +/- 4 K, +/- 5 K Limits the possible setting range for the setpoint offset function. Minimum valid base setpoint value Maximum valid base setpoint value 5 C, 6 C, 7 C, 8 C, 9 C, 10 C, 11 C, 12 C, 13 C, 14 C, 15 C,16 C 17 C, 18 C, 19 C, 20 C 20 C, 21 C, 22 C 23 C, 24 C, 25 C 27 C, 30 C, 32 C Applicable for the received values above object 1 (manual setpoint value offset). If a base setpoint value received by object 0 is lower than the set value, it will be limited to this value. If a base setpoint value received by object 0 is higher than the set value, it will be limited to this value. Version: Dec-10 (subject to change) Page 22 of 65

3.4.4 Actual value Table 13 Designation Values Application Calibration value In 1/10 K (-64.. 63) Manual input 64... 63 Positive or negative adjustment of measured temperature in 1/10 K increments. Examples: a) RAM 712 sends 20.3 C. A room temperature of 21 C is measured using a calibrated thermometer. 7 (i.e. 7 x 0.1K) must be entered to increase the temperature of RAM 712 to 21 C. b) RAM 712 sends 21.3 C. 20.5 C is measured. To reduce the temperature of RAM 713 to 20.5 C, 8 (i.e. -8 x 0.1K) must be Transmission of the actual value Cyclical transmission of the actual value Not in the event of change With change of 0.2 K With change of 0.3 K With change of 0.5 K With change of 0.7 K With change of 1 K With change of 1.5 K With change of 2 K Do not send cyclically Every 2 min., every 3 min. Every 5 min., every 10 min. Every 15 min., every 20 min. Every 30 min, every 45 min. Every 60 min. entered. Is the current room temperature to be transmitted? If yes, from which minimum change should this be resent? This setting keeps the bus load as low as possible. How often should the values be sent, regardless of the temperature changes? Version: Dec-10 (subject to change) Page 23 of 65

3.4.5 Cooling control Table 14 Designation Values Application Type of control Continuous control Infinite control (0.. 100%). 2-point control Setting the control parameters Via system type Switching control (On/Off). See appendix: Continuous and switching control Standard application System type Hysteresis of 2 wire control for cooling. hysteresis reduction to switching point User-defined Cooling surface Fan coil unit 2-point control 0.3 K, 0.5 K, 0.7 K 1 K, 1.5 K, 2 K 3 K, 4 K, 5 K 6 K None 0.1 K/min 0.2 K/min 0.3 K/min Professional application: P/PI controller set up PI control with: Integrated time = 90 minutes Bandwidth = 2 k Integrated time = 180 minutes Bandwidth = 4 k Interval between the switch-off point (setpoint value) and the switch back on point (setpoint value hysteresis). The hysteresis prevents constant switching on/off. The recirculation causes a gradual decrease in hysteresis over time, and the control accuracy is increased. The hysteresis is equivalent to the programmed value for each switch-off and is gradually reduced by the recirculation process. The hysteresis can reduce to 0 K over prolonged periods of switch-off. At the next switch-on, it is reset to the configured value. Version: Dec-10 (subject to change) Page 24 of 65

Continuation Designation Values Application User-defined control parameters Proportional band of the cooling control Integrated time of the cooling control 1 K, 1.5 K, 2 K, 2.5 K, 3 K 3.5 K, 4 K, 4.5 K 5 K, 5.5 K, 6 K 6.5 K, 7 K, 7.5 K 8 K, 8.5 K Pure P control Professional setting for adapting controlresponse to the room. Large values cause finer changes to the actuating value with the same control deviation and more precise control than smaller values. See appendix temperature control Sends the cooling control variable Sends cooling actuating value cyclically *Change since last transmission 15 min., 30 min., 45 min., 60 min., 75 min., 90 min., 105 min, 120 min, 135 min, 150 min, 165 min, 180 min, 195 min, 210 min, 225 min With change of 1 % With change of 2 % With change of 3 % With change of 5 % With change of 7 % With change of 10 % With change of 15 % Not cyclical, only in the event of change Every 2 min. Every 3 min. Every 5 min. Every 10 min. Every 15 min. Every 20 min. Every 30 min. Every 45 min. Every 60 min. Only for PI control: The integrated time determines the reaction time of the control. It lays down the increase that the output control variable is raised by, in addition to the P share. The I- share remains active for as long as there is a control deviation. The I share is added to the P share. After how much % change* in the control variable is the new value to be sent. Small values increase control accuracy and also the bus load. How often is the current cooling control variable to be sent (regardless of changes)? Version: Dec-10 (subject to change) Page 25 of 65

Continuation Designation Values Application Switchover between heating and cooling Automatic RAM 712 automatically switches to cooling mode when the actual temperature is above the set point value. Output of the cooling actuating value* Via object on separate object (object 8) The cooling mode can only be activated on the bus via object 9 (1= cool). Cooling mode remains off for as long as this object is not set. For 4-pipe systems: The heating actuating value is sent to object 7 and the cooling actuating value to object 8. Together with heating actuating value (object 7) * Only when switching between heating and cooling via object. For 2-pipe systems: The actuating value is always sent to object 7, independent of whether heating or cooling mode is active. Version: Dec-10 (subject to change) Page 26 of 65

3.4.6 Operating mode Table 15 Designation Values Application Objects for determining the operating mode Operating mode, presence, window status RAM 712 can switch the operating mode depending on the window and presence contacts. alt.: Comfort, night, frost Traditional setting without window and presence status. Operating mode after reset Type of presence sensor (to Obj. 4) Frost protection Night-time temperature reduction Standby Comfort Presence detector Presence keys Operating mode after start-up or reprogramming The presence sensor activates the comfort operating mode Comfort operating mode as long as the presence object is set. 1. If the operating mode object (object 3) is called up again after setting the presence object the new operating mode will be accepted and the state of the presence object ignored. 2. If the presence object is set during night / frost operation, it is reset after the configured comfort extension finishes (see below). 3. The presence object is not reported on the bus Version: Dec-10 (subject to change) Page 27 of 65

Continuation Designation Values Application Comfort extension by presence keys in night mode* None Telegrams from presence key are not considered. Sends the current operating mode cyclically 30 minutes. 1 hour 1.5 hours 2 hours 2.5 hours 3 hours 3.5 hours Not cyclical, only in the event of change Every 2 min., every 3 min. Every 5 min., every 10 min. Every 15 min., every 20 min. Every 30 min., every 45 min. Every 60 min. *Parameter is not available with presence detectors Party switching: This allows Ram 712 to change via presence object from night/frost mode to comfort mode again for a set length of time. The time limit is omitted if the device was previously in standby mode. Comfort operation is only cleared with the next manual or bus controlled change of operating mode. How often should the current operating mode be sent? Version: Dec-10 (subject to change) Page 28 of 65

3.4.7 Cooling setpoint values This page is only displayed only if the heating and cooling control function has been selected on the settings parameter page (user-defined control). Table 16 Designation Values Application Dead zone between heating and cooling* Increase in standby mode (during cooling) Increase in night mode (during cooling) Setpoint value for heat protection mode (during cooling) 1 K 2 K 3 K 4 K 5 K 6 K * According to each type of control: + Hysteresis heating" or + Hysteresis heating + Hysteresis cooling" 0 K, 0.5 K, 1 K, 1.5 K 2 K, 2.5 K, 3 K 3.5 K, 4 K, 5 K 3 K, 4 K, 5 K 6 K, 7 K, 8 K 42 C (does not represent heat protection) 29 C, 30 C, 31 C, 32 C, 33 C, 34 C 35 C Specifies the buffer zone between setpoint values in heating and cooling modes. The dead zone is expanded through hysteresis in switching (2 point) control. See glossary: Dead zone The temperature is increased in standby mode during cooling operation See increase in standby mode Heat protection represents the maximum permitted temperature for the controlled room. It performs the same function during cooling as the frost protection mode during heating, e.g. saves energy while prohibiting nonpermitted temperatures Version: Dec-10 (subject to change) Page 29 of 65

3.4.8 Inputs E1, E2 3.4.8.1 The switch / key function An input is connected to a key or a switch. When this is pressed, then a switching, value, priority or temperature value telegram is sent to the bus. The following parameters are available: Table 17 Designation Values Description Debounce time 30 ms 50 ms 80 ms 100 ms 200 ms Object type 1 sec. 5 sec. 10 sec. In order to avoid a disruptive switching due to debouncing of the contact connected to the input, the new status of the input is only accepted after a delay time. Larger values ( 1s) can be used as a switch-on delay Channel sends: Switching (1-bit) Switching telegrams Priority (2-bit) Priority telegrams Value 0.. 255 (1 byte) Any desired value between 0 and 255 Temperature value (2-byte) A temperature value in EIS5 format Version: Dec-10 (subject to change) Page 30 of 65

Continuation: Designation Values Description For switching object type: How should the channel respond when an input voltage is applied? None Ignore On Send ON telegram Off Send OFF telegram By Reverse channel status (cf. notching relay) For priority 2 bit object type None No response. Response to rising edge Table 18: Telegrams Function Value Priority inactive (00) Priority inactive 0 (00 (no control) bin ) Priority ON (11) Priority ON 3 (11 (control: enable, on) bin ) Priority OFF (10) Priority OFF 2 (10 (control: disable, off) bin ) For value object type Any value between 0 and 255 can be sent. These values can also be used as percentage values or as HVAC commands None No response 0 = 0 % (corresponds to 0. 0% or HVAC operating mode HVAC mode: Auto) Auto Response to falling edge 1 (corresponds to HVAC 1 or "comfort" operating mode mode: Comfort) 2 (corresponds to HVAC 2 or "standby" operating mode mode: Standby) 3 (corresponds to HVAC 3 or "night-time temperature mode: Night-time reduction" operating mode temperature reduction) 4 (corresponds to HVAC 4 or "frost protection" operating mode mode: Frost protection) 5.. 255 any desired value or percentage value Percentage values are given in 5% increments, e.g. 13 = 5%, 26 = 10%, 255 = 100 %. See response to rising edge How does the channel respond when switched off, i.e. by a signal change from 1 to 0? See response to rising edge. Version: Dec-10 (subject to change) Page 31 of 65

Continuation: Designation Values Description For temperature value object type. Temperature value with a rising edge Temperature value with a falling edge Send telegram cyclically Cycle time Reaction when setting the lock Reaction when cancelling the lock Do not send temperature value. 0 C.. 40 C in 1 C increments See temperature value with a rising edge Common parameters No Yes Only after rising edge Only after falling edge 2 minutes, 3 minutes, 5 minutes, 10 minutes, 15 minutes, 20 minutes 30 minutes, 45 minutes 60 minutes No response. Send temperature value. This function can be used to send a setpoint value to a thermostat, for example. What temperature values should be sent when the input signal changes from 1 to 0? What events should be sent cyclically? At what time interval are the cyclic telegrams to be sent again? Ignore lock Disable telegrams are ignored No reaction when setting the If necessary, only respond when the lock lock is cancelled. Same as after rising edge Send the same telegram as configured for response to rising edge. Same as after falling edge Send the same telegram as configured for response to falling edge. No reaction when cancelling If necessary, only respond when the the lock lock is set Update The current status of the channel is sent. Same as after rising edge Send the same telegram as configured for response to rising edge. Same as after falling edge Send the same telegram as configured for response to falling edge. Version: Dec-10 (subject to change) Page 32 of 65

Continuation: Designation Values Description Response after restoration of the bus supply None No response. Update The current status of the channel is sent. Same as after rising edge Response configured as for rising edge. Same as after falling edge Response configured as for falling edge. Update after 5 sec. Update after 10 sec. Update after 15 sec. After 5 sec. same as after rising edge After 10 sec. same as after rising edge After 15 sec. same as after rising edge After 5 sec. same as after falling edge After 10 sec. same as after falling edge After 15 sec. same as after falling edge The current channel status is sent after set time has elapsed. Once the set time has elapsed the channel responds as configured for a rising edge. Once the set time has elapsed the channel responds as configured for a falling edge. Version: Dec-10 (subject to change) Page 33 of 65

3.4.8.2 The dimming function With Single key operation one input is connected to a simple key. With other operating modes 2 inputs and 2 keys are required per dimmer channel. Consequently, both inputs must be connected via common group addresses. Example: Group addresses 3/4/5 for brighter object from channel 1 and darker object from channel 2. Group addresses 3/4/6 for switching ON/OFF objects from channel 1 and channel 2. Depending on the length of time the keystrokes (short/ long keystroke) dimming or ON/OFF telegrams to the dimmer, see below. The following parameters are available: Table 19 Designation Values Description Debounce time 30 ms 50 ms 80 ms 100 ms 200 ms 1 sec. 5 sec. 10 sec. Debouncing of the connected key (see above switch/key function) This input distinguished between a long and a short keystroke, and can thus carry out two functions Response to long / short Single key operation The dimmer is operated with a single switch. Short keystroke = ON/OFF Long keystroke = brighter/darker Release = stop With the other variants, the dimmer is operated using two keys (rocker). Brighter / ON Short keystroke = ON Long keystroke = brighter Release = stop Brighter/BY Short keystroke = ON/OFF Long keystroke = brighter Release = stop Version: Dec-10 (subject to change) Page 34 of 65

Continuation: Designation Values Description Darker/OFF Short keystroke = OFF Long keystroke = darker Response to Release = stop long / short Darker/BY Short keystroke = ON/OFF (continuation) Long keystroke = darker Release = stop Long button push starting at Increment for dimmer Reaction when setting the lock Response to cancellation of the lock Response after restoration of the bus supply 300.. 1000ms This function serves to clearly differentiate between long and short keystrokes. If the keystroke at least as long as the set time, then a long keystroke will be registered. With a long keystroke, the dimming value is: 100 % Increased (or decreased) until the key is released. 50 % 25 % 12,5 % 6 % 3 % 1,5 % Increased by the selected value (or lowered) Ignore lock Disable telegrams are ignored No reaction when setting the Respond only if lock is cancelled lock ON Send switch-on telegram OFF Send switch-off telegram No reaction when cancelling Cancelling the lock does trigger the lock sending ON Switch dimmer on OFF Switch dimmer off None No response ON Send switch-on telegram OFF Send switch-off telegram ON after 5 sec ON after 10 sec ON after 15 sec OFF after 5 sec OFF after 10 sec OFF after 15 sec Send switch-on telegram with delay Send switch-off telegram with delay Version: Dec-10 (subject to change) Page 35 of 65

3.4.8.3 Blinds function With single key operation one input is connected to a simple key. With other operating modes 2 inputs and 2 keys are required per set of blinds. Consequently, both inputs must be connected via common group addresses. Example: Group addresses 3/5/5 for UPobject from channel 1 and DOWN object from channel 2. Group addresses 3/5/6 for step /stop objects from channel 1 and channel 2. Depending on the length of time the key is depressed (short/ long keystroke) motion or step commands to the blinds actuator, see below. The following parameters are available: Table 20 Designation Values Description Debounce time 30 ms, 50 ms, 80 ms, 100 ms Debouncing of the connected key 200 ms, 1 sec., 5 sec., 10 sec. (see above switch/key function) Operation Single key operation The blinds are operated with a single switch. Short keystroke = Step Long keystroke = Move DOWN Short keystroke = Step Long keystroke = Lower UP Short keystroke = Step Long keystroke = Raise Long keystroke starting at Motion is stopped by Run commands: Change of direction with each keystroke The stop command is triggered either by releasing the key or pressing it briefly, depending on configuration. See below: Motion is stopped by 300.. 1000ms This function serves to clearly differentiate between long and short keystrokes. If the keystroke at least as long as the set time, then a long keystroke will Releasing the key Short keystroke be registered. How should the stop command be triggered? Version: Dec-10 (subject to change) Page 36 of 65

Continuation: Designation Values Description Reaction when setting the lock Ignore lock Disable telegrams are ignored No reaction when setting the Only respond when the lock is lock cancelled UP Send move up command* DOWN Send move down command Reaction when cancelling the lock No reaction when cancelling Only respond when the lock is set the lock Up Send move up command Down Send move down command Response after restoration of the bus supply None No response UP Send move up command DOWN Send move down command UP after 5 sec Send delayed ascend command UP after 10 sec UP after 15 sec DOWN after 5 sec Send delayed descend command DOWN after 10 sec DOWN after 15 sec *If a lock telegram is received while the UP button is pressed, the move up telegram will be sent after releasing this button. Version: Dec-10 (subject to change) Page 37 of 65

3.4.8.4 Valuator function Basic functionality: Pressing the connected key triggers a value telegram. Depending on the configuration, two different telegrams can also be sent ( long/short function). Table 21 Designation Values Description Debounce time 30 ms, 50 ms, 80 ms 100 ms, 200 ms, 1 sec. 5 sec., 10 sec. switch/key function) Type of value Value Special function after long keystroke Long keystroke starting at Value with a long keystroke Debouncing of the connected key (see above: Valuator short/long Sends two different values, depending on whether the keystroke for a long or short period Value for light setting Send a scene number between 0 and 63. Valuator for blinds Sends a height telegram and a slats telegram Parameters fortype of value for light scene Input 0.. 255 No Yes 1 sec. 2 sec. 3 sec. 5 sec. Input 0.. 255 Value which is to be sent with a short* keystroke. Should a different value be sent with a long keystroke? This function serves to clearly differentiate between long and short keystrokes. If the keystroke at least as long as the set time, then a long keystroke will be registered. Value which is to be sent with a long keystroke Version: Dec-10 (subject to change) Page 38 of 65

Continuation: Designation Values Description Parameter for value for light scene type of value Scene number Scene 1.... Scene 64 Save when long time operation Long keystroke starting at No Yes 1 sec. 2 sec. 3 sec. 5 sec. Sends the selected scene number (call scene) Should a saved scene telegram be sent with a long keystroke? This function serves to clearly differentiate between long and short keystrokes. If the keystroke at least as long as the set time, then a long keystroke will be registered. Parameter for valuator for blinds type of value 2.8 m 0.. 100 % in 5 % increments Sends a positioning telegram to the blinds / shutter actuator Slats 0.. 100 % in 5 % increments What slat position should be sent to the actuator together with the positioning telegram? Special function after long time operation Reaction when setting the lock Reaction when cancelling the lock What function should be carried out with a long keystroke? None Slats to 0% and move blinds up to upper stopping point Slats to 100% and move blinds down to lower stopping point Common parameters No All the way UP (0%) All the way DOWN (100%) Ignore lock Disable telegrams are ignored Lock After a lock telegram (status =1) is received, the channel no longer transmits. No reaction when cancelling No reaction when cancelling the lock the lock Update When the lock is cancelled (status=0), the current channel status should be sent again. Version: Dec-10 (subject to change) Page 39 of 65

Continuation: Designation Values Description Response after restoration of the bus None No response after restoration of the bus supply. supply As with short keystroke, send Same telegram as configured for immediately short keystroke Send without delay. As with short keystroke, after Same telegram as configured for 5 seconds short keystroke Only send after As with short keystroke, after selected delay. 10 seconds As with short keystroke, after 15 seconds *If the parameter special function after long keystroke is set to no then the length of the keystroke is irrelevant. See appendix: External interface Version: Dec-10 (subject to change) Page 40 of 65

4 Start-up 4.1 Installation in a flush-mounted socket The controller and circuit board are fixed with a release fastener and can simply released from the white housing for installation in a flush-mounted socket. IMPORTANT: The device must not be installed if the flush-mounted socket is connected to mains! Procedure: Remove control from base of housing (release fastener) and install in a flush-mounted socket. Install the integrated temperature sensor to allow reliable measurement of room temperature (If there is any doubt find the correct position by trial and error). Ensure there is adequate ventilation. If necessary, use external sensor Version: Dec-10 (subject to change) Page 41 of 65

4.2 Actuators to control heating and cooling There are several possibilities available for controlling the heating and cooling equipment. 4.2.1 Heating control variable The control variable is sent to a continuous Cheops actuating drive (order no. 731 9 200), which is plugged onto the valve The control variable is sent to one of the following heating actuators which controls one or more thermal positioning actuators.. - HMG 4 (order no. 491 210) - HME 4 (order no. 491 0 211) - HMT 6 (order no. 490 273) - HMT 12 (order no. 490 0 274) 4.2.2 Cooling control variable The control variable is sent to a continuous Cheops actuating drive (order no. 731 9 200), which is plugged onto the valve for the cooling medium. The control variable is sent to one of the following heating actuators which controls one or more thermal positioning actuators.. - HMG 4 (order no. 491 210) - HME 4 (order no. 491 0 211) - HMT 6 (order no. 490 273) - HMT 12 (order no. 490 0 274) Version: Dec-10 (subject to change) Page 42 of 65

5 Typical applications: 5.1 The school environment: Heating with presence detector and frost protection via window contact. 5.1.1 Description RAM 712 controls one or more actuators. Once someone enters the room the RAM 712 changes to comfort mode, otherwise it operates in standby mode during the day and in night time mode at night. If a window is opened RAM 712 automatically changes to frost protection mode A presence detector is used for presence recognition. The presence telegram is only sent after a switch-on delay so that the heating is not activated if the room is only occupied for a short time. All windows are fitted with window contacts. These are connected with input 1 on RAM 712. The window status is sent via a common group address to the window position input object. RAM 712 will recognise when a window is opened and automatically switch to frost protection mode. When the window is closed the previously set operating mode will be restored. 5.1.2 Devices: RAM 712 (order no. 712 9 200) Cheops drive (order no. 731 9 200) TR 644 S EIB / TR 644 S DCF EIB (order no. 644 9 203 / 644 9 204) Compact office EIB (order no. 201 9 200) Version: Dec-10 (subject to change) Page 43 of 65

5.1.3 Overview Obj. 9 E1 Obj. 4 Obj.11 Obj. 5 Obj. 7 Obj. 3 Obj. 0 Obj. 0 Figure 1 Version: Dec-10 (subject to change) Page 44 of 65

5.1.4 Objects and links Table 22: RAM 712 Cheops drive No. 7 RAM 712 Object name Heating control variable Cheops drive No. Object name 0 Control variable Comments Actuator receives heating actuating value and moves the valve position Table 23: RAM 712 RAM 712 RAM 712 No. Object name No. Object name 11 Input 1 switching 5 Window position Comments Object 11 sends the window status to object 5 (input for window contact) via the bus. Both objects are connected to each other via a common group address. Table 24: TR 644 RAM 712 TR 644 S EIB RAM 712 No. No. Object name Object name 0 Channel 1 Valuator 3 Operating mode preset Comments Channel 1 of timer: ON= 2 (standby) OFF= 3 (night) Table 25: Compact office EIB RAM 712 Compact office EIB RAM 712 No. No. Object name Object name 9 Presence output 4 Presence Comments Switches RAM 712 to comfort mode when presence is detected. Version: Dec-10 (subject to change) Page 45 of 65

5.1.5 Important parameter settings Standard or user-defined parameter settings apply for unlisted parameters. 5.1.5.1 RAM 712 Table 26 Parameter page Parameters Setting Settings Control Standard Function of the external interface Active Type of controller used Remote controller Operating mode Objects for determining the operating mode Operating mode, presence, window status Operating mode after reset Standby Presence sensor type (to obj. 4) Presence detector Input 1 Input function Switch/key Debounce time 100 ms Object type Switching (1-bit) Response to rising edge ON (OFF*) Response to falling edge OFF(ON*) Response after restoration of the bus supply Update * Depending on type of window contact. The details in brackets refer to the following: Window closed Contact closed 5.1.5.2 TR 644 S EIB / TR 644 S DCF EIB Table 27 Parameter page Parameters Setting Channel 1 Object type Value Value when clock is switched off 3* Value when clock is switched on 2** * corresponds to night HVAC operating mode ** corresponds to standby HVAC operating mode Program example for TR 644 S: Channel 1, 7:30 ON, 17:30 OFF, Monday to Friday. Version: Dec-10 (subject to change) Page 46 of 65

5.1.5.3 Compact office EIB Table 28 Parameter page Parameters Setting General information Operating mode Master in individual switching mode Presence output Active Normal or test operating mode Normal operation Presence output Presence switch on delay 5 minutes Behaviour at start of presence Send ON telegram Behaviour at end of presence Send OFF telegram 5.1.5.4 Cheops drive The standard parameter settings can be used here. Version: Dec-10 (subject to change) Page 47 of 65