SIOX Analogue Module TABLE OF CONTENTS. General Description...1 I/O Mix...1 Versions...1 Installation and Start-Up...3 Address Setup...

Transcription

1 SIOX S48 ANALOGUE MODULE p 2 TELEFRANG AB SIOX Analogue Module General Description S48 is an I/O module with eight differential analogue inputs and two outputs. Each input can be set up as two single-end inputs. Bipolar voltage, current, resistive transducers and thermocouples can be measured. Operating modes and scaling factors are saved in an EE- PROM. The unit can be PLC programmed to permit advanced local control and regulation in the module. I/O Mix Analogue Inputs: Analogue Outputs: S48 8 differential or 16 single-end 12-bit inputs, each settable as ±10 V, ±2 V, ±20 ma, 4-20 ma, 0-20 k Pot, 10 k NTC, Pt100 or Thermocouple J and K. 2 AO, each 0 (2) - 10 V or 0 (4) - 20 ma, 10 bits TABLE OF CONTENTS General Description...1 I/O Mix...1 Versions...1 Installation and Start-Up...3 Address Setup...4 Analogue Inputs...5 Differential 10 V...7 Dual Single-End 10 V...7 Differential 20 ma...8 Dual Single-End 20 ma...9 Dual Potentiometer/NTC...9 Dual Pt 100 (Two-Wire)...10 Differential Pt 100 (Three-Wire)...11 Differential Thermocouple Mode V Reference...13 Analogue Outputs...13 Analogue Outputs Range...13 SIOX Message Transfer for S Data Mode Communication...14 String Mode Communications...15 Parameter Setup...15 Parameter Specifics...21 Power Supply Considerations...23 Electrical Specifications...25 Analogue Input Conversion Time...27 Environmental Specifications...27 Mechanical Specifications...27 Revisions...27 Versions: S48, SIOX Analogue I/O Module H:\S48\Man\S48man.wpd/ /TC

2 SIOX S48 ANALOGUE MODULE p 3 SIOX S48 ANALOGUE MODULE p 4 Installation and Start-Up To get the module "up and running", all that has to be done is to connect a power supply to terminals 26 and 27 and the SIOX bus to terminals 24 and 25. Both the power and the SIOX connectors are unpolarized. The SIOX modules should be interconnected through a two-wire, low capacitance twisted pair. Shielded cables may be used but unless a correct strategy for shield grounding is adopted, it may prove to be of little benefit. Instead, the capacitance between the shield and the bus wires will add to the total capacitive load on the SIOX bus and decrease the maximum distance over which communication can be carried out for a given bit rate. The total resistance of the bus should not be higher than 2 * 50. EEPROM. These operation modes are further described for each type of I/O and summarized in the Parameter Setup section. Changes are brought about by Parameter Setup Strings communicated over the SIOX bus, described on page 14. Alternatively, the PC based SIOXUSER or Visual SIOX program packages permit easy access to all parameters. Address Setup There are two ways of defining each of the 63 addresses for an S48 module, either through jumpers in the module or by the internal EEPROM in the module. The jumpers consist of six pairs of pins marked A0 - A5 and up to 6 jumper blocks. If any combination of jumpers except all six installed or all six removed is used at power-up, the module will choose this jumper combination as the correct address. = 63 : Illegal, will use EEPROM definition = 26 : Valid address ( = 26 ) = 00 : Illegal, will use EEPROM definition. The power supply can be any AC or DC voltage of VDC or VAC. The module consumes less than 20 ma and the analogue current outputs possibly another 40 ma. The communication bus is opto-isolated from the rest of the module. Unless otherwise requested, the module is set up at the factory to communicate at 4800 bits/s using address 01. General principles for the SIOX bus and communications are described in a separate manual, the "SIOX System Description". A variety of analog I/O can be connected to terminals 1-17 and In addition to the physical connections, configuration for various signals must be selected through hardware jumpers and parameter changes in the internal The jumper positions A /0 - A5 contribute their values 1, 2, 4, 8, 16 and 32 when the corresponding jumper is removed. All jumpers installed would generate the invalid slave address 00, and all jumpers removed would be equal to the illegal jumper address 63. In this case, the module checks its internal parameter /01 for a valid address number (which could be address 63). Should an invalid address be found, address 63 will be selected. The selected address, either from the jumpers or the EEPROM, is finally saved in the RAM parameter /01 and used for all subsequent communications until this parameter is changed or a new power-up is performed. Changing the RAM address can be done from the master or from the local PLC program in the module, but make absolutely certain to avoid collision with other modules on the bus. A special feature is added to help recover "lost" modules, i.e. when an unknown bitrate and/or address is selected or the PLC runs a program that erroneously alters parameters affecting the communication. To recover such a module,

3 SIOX S48 ANALOGUE MODULE p 5 SIOX S48 ANALOGUE MODULE p 6 carry out the following steps: 1. Disconnect power. 2. Remove all address jumpers except for A0 and A1 but rotate these two jumpers 90* from their normal position. Please refer to the figure below. Unused Inputs To prevent excessive A/D-conversion times due to possible overranges, unused channels should never be left floating. For each unused channel, the second row from the bottom should be jumpered. The example shows channels AI9/AI1, both jumpered as unused. 3. Apply power. The module will now communicate at 4800 bits/s using address 63 with the PLC and any options disabled. 4. Check and reconfigure the module for proper operation. 5. Restore correct jumper address. Analogue Inputs The analogue inputs can handle an arbitrary mix of input signals: 10 V, 2-10 V, - 2 V, - 20 ma, 4-20 ma, Pt100, Thermocouple, NTC and potentiometer. Up to eight differential or 16 single ended inputs can be connected using screw terminals Terminal 1 and/ or 18, Analogue Ground, are used as ground reference in some measurements, i.e. Pt100/NTC and singleended voltage measurements. They are connected internally to the Power GND terminal 22 and should not carry undesired currents in order to avoid voltage drops to maintain accuracy when used as reference grounds. Setting up a specific mode includes selecting the right connection terminals, installing jumpers in one of eight selection fields and setting the signal type in one of the parameters /04 - /0B. These settings are further described for different signal types. Terminals 1 (AGND) and 2-3, the first jumper selection field, and the corresponding setup parameter /04 are shown, but seven further sections are handled identically. Input Protection In order to protect inputs operating as 20 ma current inputs from accidental overload, each input terminal is equipped with a series PTC-thermistor. They act as current limiting devices during overload conditions, reducing the input current to a safe level and, hence, preventing damage to the unit. However, input alternatives other than 20 ma current inputs must not have these resistors applied as they would affect the measurements adversely. To control this, one additional 2-pin jumper is added for each input. When left open, the PTC-thermistor will be in series with the input, adding protection for 20 ma current input modes. When jumpered, it will short-circuit the PTC-thermistor, removing its influence on the measurements for other input alternatives. These jumper positions are located at the bottom row of the jumper area and should always be jumpered for all input alternatives except 20 ma current measurement modes. When differential 20 ma input mode is used (requires two inputs), it is not necessary to use more than one PTC-thermistor as protection. This will also reduce the total input voltage drop to approximately 5 V for a full 20 ma input current. For detailed information regarding the input alternatives, please refer to the following pages.

4 SIOX S48 ANALOGUE MODULE p 7 SIOX S48 ANALOGUE MODULE p 8 Differential 10 V Mode This mode measures positive and negative voltages between terminals 2 and 3 even when common-mode disturbances offset both terminals up to - 80 V. Installing the two jumpers shown above AI1 divides the differential signal before measurement. In addition to the signal wires to terminals 2 and 3, any cable screen or signal grounding point for the input signal is best connected to terminal 1, Analogue Ground. The signal wires may also be installed on terminals for channels AI2...AI8. Parameter /04 (or /05- /0B for terminals 4-5 up to 16-17, respectively) shall be set at /0 /0xx. A -10 V signal will set the result data in parameter 38 to hex F /0 /0 /0 and a +10 V signal will set the result hex 1 /0 /0 /0. 0 V corresponds to /0 /0 /0 /0. Parameters 39, 3A, 3B, 3C, 3D, 3E and 3F contain the results for terminals 4-5, 6-7, 8-9, 10-11, 12-13, and 16-17, respectively. Signals in the range -2 V can be specified by setting the parameter at 2 /0xx. It is still possible to measure 10 V signals but the result will be 5 times larger. In some applications, zero levels may be offset so that the effective measurement range is +2 V to +10 V. Such signals are measured using the parameter setting 4xxx. 10 V will still produce the result hex 1 /0 /0 /0 but the result /0 /0 /0 /0 is obtained at +2 V. Lower voltages produce negative results and are regarded as erroneous measurements. Dual Single-End 10 V Mode This mode permits two separate signal sources to be measured, one connected between terminals 2 and 1 and the other between 3 and 1. This, however, necessitates that the signal sources can share the same ground level as the S48, namely Analogue Ground, terminal 1. The same two jumpers as in differential 10 V mode should be installed, one for either 10 V channel. All terminals may similarly be used in single-end mode, either as voltage or an alternative single-end signal source described on the following pages. Parameter /04 (or /05- /0B for terminals 4-5 up to 16-17, respectively) shall be set at 8 /0 /0 /0. The results will be stored in parameter 38 for channel 1 and in parameter 3 /0 for channel 9. Results for the seven other pairs are stored in parameters 39/31, 3A/32, 3B/33, 3C/34, 3D/35, 3E/36 and 3F/37. A -10 V signal will set the result data to hex F /0 /0 /0 and a +10 V signal will set the result 1 /0 /0 /0. 0 V corresponds to /0 /0 /0 /0. Signals in the range - 2 V are specified by setting the parameter to hex A /02 /0. Zero levels offset to a +2 V to +10 V range are measured using the parameter setting C /04 /0. Differential 20 ma Mode This mode measures bidirectional currents flowing between terminals 2 and 3 also when their voltage level differs from the S48 ground level with up to - 80V. Two jumpers divide the differential signals before conversion, and another shunts a current measurement resistor across the input pins. In addition to the signal wires to terminals 2 and 3, any cable screen or signal grounding point for the input signal is best connected to terminal 1, Analogue Ground. Parameter /04 (or /05- /0B for terminals 4-5 up to 16-17, respectively) shall be set at /08xx. A -20 ma signal (in at terminal 3 and out at terminal 2) will set parameter 38 result data to hex F /0 /0 /0 and a +20 ma signal will set the result hex 1 /0 /0 /0. 0 ma corresponds to /0 /0 /0 /0. In many applications, zero levels may be offset so that the effective measurement range is +4 ma to +20 ma. Such signals are measured using the parameter setting 48xx. 20 ma will still produce the result hex 1 /0 /0 /0 but the result /0 /0 /0 /0 is obtained at +4 ma. Lower currents produce negative results and are regarded as erroneous measurements.

5 SIOX S48 ANALOGUE MODULE p 9 SIOX S48 ANALOGUE MODULE p 10 Dual Single-End 20 ma Mode This mode measures bidirectional currents flowing between terminals 2 or 3 and terminal 1 (AGND). This, however, requires that the signal sources can use the same ground level as the S48. In addition to the jumpers that divide the differential signal before measurement, another two connect current measurement resistors from the input pins to ground. For maximum flexibility, either half of the terminal pair may be modified to suit another single-end input mode. Parameter /04 (or /05- /0B for terminals 4-5 up to 16-17, respectively) shall be set at 88 /08. A -20 ma signal (out from terminal 2/3) will set the result data in parameter 38 or 3 /0 to hex F /0 /0 /0 and a +20 ma signal will set the result hex 1 /0 /0 /0. 0 ma corresponds to /0 /0 /0 /0. Zero levels may be offset so that the effective measurement range is +4 ma to +20 ma by setting the parameter to C ma will still produce the result hex 1/0 /0 /0 but the result /0 /0 /0 /0 is obtained at +4 ma. Lower currents produce negative results and are regarded as erroneous measurements. Dual Potentiometer/NTC Mode This mode permits two separate resistive transducers to be measured, one connected between terminals 2 and 1 and the other between 3 and 1. An internal 10 k resistor supplied from a +10 V reference voltage provides the necessary measuring current for each signal. Software treats the measurement to get an output proportional to either the potentiometer value or to an NTC temperature. The same two jumpers as in 10 V modes are installed to decrease the input signal, one for either channel. In addition, an extra jumper for each channel connects the current source to the input pins. Connection is independent of the sensor type. Parameter /04 (or /05- /0B for terminals 4-5 to 16-17, respectively) is set at 9818 for two NTC transducers and at A828 for two potentiometers. A potentiometer resistance of 0 between terminals 3 and 1 will set the resulting data to hex /0 /0 /0 /0, 5 k to /04 /0 /0, 10 k to /08 /0 /0 and 20 k to hex 1 /0 /0 /0. Up to 80 k = 4 /0 /0 /0 can be handled but with less resolution. A suitable NTC sensor should have a nominal resistance of 10 k at 25*C and a B value around 3900, indicating that its resistance at -25 *C is 130 k and at 75 *C 1,48 k. The resulting values at various temperatures is the temperature in tenths of degrees C: -25 *C = -250 = hex FF /06; 25 *C = 250 = hex /0 /0FA; 75 *C = 750 = hex /02EE. A temperature range of -50 *C to +150 *C can be read. Dual Pt 100 (Two-Wire) Mode This mode permits two separate resistive temperature transducers of the Pt 100 type to be measured, one connected between terminals 2 and 1 and the other between 3 and 1. An internal 10 k resistor supplied from +10 V provides the necessary measuring current for each signal. Software treats the data to produce a result proportional to the transducer temperature. The results will be stored in parameters 38 and 3 /0. Two "vertical" jumpers between the top and middle rows are installed to supply the transducer current. In Pt100 Mode full amplification is needed and the jumpers in the second row from the bottom shall be removed. Note that this make the inputs more sensitive to overvoltages. Although the inputs are well protected, adjacent channel measurements may increase the A/D conversion time on the used channel, so these jumpers in the second row should not be removed on unused channels. Parameter /04 (or /05- /0B for terminals 4-5 up to 16-17, respectively) shall be set at 9 /01 /0. Typical Pt 100 sensors are normalized through the DIN curve to exhibit 100 at 0 *C with a change of 0,385 / *C. Software linearizes the readings and present resulting values at various temperatures equal to the temperature in tenths of degrees C, e.g.: -25 *C = -250 = hex FF /06; 25 *C = 250 = hex /0 /0FA; 100 *C = 1000 = hex /03E8. A temperature range of -200 *C to +300 *C can be read. An alarm signal is transferred by software to the bus master in case of an open transducer wire. The alarm signal is transferred as an A/D data value of -204,8

6 SIOX S48 ANALOGUE MODULE p 11 SIOX S48 ANALOGUE MODULE p 12 *C = hex F8 /0 /0. When this happens, the high voltage on the multiplexer input might block the conversion on adjacent channels. Differential Pt 100 (Three-Wire) Mode This mode permits one resistive temperature transducer of the Pt 100 type to be measured, connected via two wires to terminals 2 and 3. To compensate for long wires whose resistance may affect the readings, a third wire is connected to terminal 1, in effect parallel with the wire to terminal 3. An internal 10 k resistor supplied from +10 V provides the necessary measuring current. Software assumes that the voltage drop in the wire to terminal 2 is identical to what it measures in wire 1 and compensates for the error. It is important that the wire 1 and wire 2 resistances are well matched as a difference of 1 will give an error of 2,5 *C. Maximum allowable resistance in each wire is 15. In Pt100 Mode full sensitivity is needed and both jumpers in the second row from the bottom shall be removed. Note that full amplification makes the inputs more sensitive to overvoltages. Although the inputs are well protected, adjacent channel measurements may increase the A/D conversion time on the used channel, so reinstall these jumpers in the second row on all unused channels. Parameter /04 (or /05- /0B for terminals 4-5 up to 16-17, respectively) shall be set at 1 /0xx. The result is stored in parameter 38 ( 39 to 3F). Typical Pt 100 sensors are normalized through the DIN curve to exhibit 100 at 0 *C with a change of 0,385 / *C. Software linearizes the readings and present resulting values at various temperatures equal to the temperatures in tenths of degrees C, e.g.: -25 *C = -250 = hex FF /06; 25 *C = 250 = hex /0 /0FA; 100 *C = 1000 = hex /03E8. A temperature range of -200 *C to +300 *C can be read. An alarm signal is transferred by software to the bus master in case of an open transducer wire. The alarm signal is transferred as an A/D data value of -204,8 *C = hex F8 /0 /0. When this happens, the high voltage on the multiplexer input might block the conversion on adjacent channels. Differential Thermocouple Mode This mode permits one temperature transducer of thermocouple J or K to be connected and measured. An internal 10 k resistor supplied from the 10 V reference provides current for the cold junction compensation via the jumper on the top row. The cold junction compensation value has an electrical time constant of 6 seconds to match typical environmental temperature gradients. To save conversion time when the cold junction is relatively stable, the reading interval can be increased by setting xx0/2, xx0/4, xx0/8 or xx10/ in parameter 0/1. A value of xx1e turns the compensation off, permitting an external temperature sensor to handle compensation in the PLC or in software in the central PC. An internal 100 resistor is connected to GND and terminal 2 via the upper jumper shown below. It prevents common mode disturbances over - 3 V in the transducer wire to overrange the A/D converter. When the transducer is remotely grounded it is recommended to remove this jumper in order to minimise ground loops in the leads. Software treats the A/D data to produce a result proportional to the transducer temperature in the temperature range -100 *C to +500 *C for type J and 0 *C to *C for K type. The temperature value is presented in degrees Celsius, e.g.: -25 *C = hex FFE7; 400 *C = hex 19 /0. The transducers are linearized through the international standard IEC An alarm signal can be set by software to the bus master in case of an open transducer wire as an A/D data value of 4096 = hex 1 /0 /0 /0. To activate it, a 10 M resistor may be connected between the specially marked pins (dotted jumper in the figure). Such jumpers can be supplied by Telefrang on order. In Thermocouple Mode full amplification is needed and the jumpers in the second row from the bottom shall be removed. Note that this make the inputs more sensitive to overvoltages. Although the inputs are well protected, adjacent channel measurements may increase the A/D conversion time on the used channel, so keep the jumpers installed in the second row on all unused channels. Parameter /04 (or /05- /0B for terminals 4-5 up to 16-17, respectively) shall be set at 38 /0 /0 for Thermocouple J and at 3 /0 /0 /0 for Thermocouple K.

7 SIOX S48 ANALOGUE MODULE p 13 SIOX S48 ANALOGUE MODULE p V Reference The voltage used when reading resistive transducers is available on terminal 19. It can be used to supply external measuring bridges or to parallel an external resistor with the internal 10 k. This simplifies using e.g. low resistance NTC sensors without affecting linearisation. Analogue Outputs The two analogue outputs connect to terminals 21 and 23, respectively, with terminal 22 as common ground. They output positive voltages between 0 and 10V at loads up to 5 ma. An individual control flag in the parameter /0E or /0F modifies this range to 2-10 V for either output to suit certain types of proportional valves etc. Through moving either jumper shown above and modifying parameter /0E or /0F, an output between 0-20 ma or 4-20 ma is selected. Refer to page 17. Analogue Outputs Range The analogue outputs reflect the current values in parameters /0C and /0D, respectively, as controlled either by SIOX communications or through the local PLC program. Normal 12-bit AO control range, compatible with other SIOX modules, is hex /0 /0 /0 /0 to 1 /0 /0 /0 = 4097 values. However, S48 outputs accept only 1025 different values within 0 to 10 V (10-bit resolution). This means that 4 consecutive 12-bit values, e.g. /0 /0 /04- /0 /0 /07, in one of the parameters will generate the same output voltage. (Single-byte Data Mode communications allow only 128 different voltages.) Negative control values, hex 8 /0 /0 /0 - FFFF (or in Double Data Mode hex 2 /0 /0 /0-3FFF) will set the output to 0 V (or 2 V if the 2V control flag is set). SIOX Message Transfer for S48 Data exchange with the module can be achieved using either String Mode giving read and write access to all information in the module, or Data Mode with 1 or 2 data characters from the central. In Data Mode output values may be set and inputs read using up to eight different, consecutive addresses. For details about these communication types it is recommended to read the "SIOX System Description". A Data Mode Communication transmits an output value from the bus master to the module. Parameter /0 /0 defines the number of addresses from 1 to 8, starting with the address set in parameter /01. If double-byte Data Mode is selected, communications to the first addresses set AO1 - AO2 and the module answers with AI1 - AI2. The values are 13-bit with sign, automatically limited to the range hex E /0 /0 /0 - /0 /0 /0 /0-1FFF. In single-byte Data Mode only 128 different analogue output values are possible, covering the full output range. A special case exists when single-byte Data Mode and only one address is available. The 128 values then select an answer from one of the 128 first parameters. Example single data communication when S48's first address is /09: From bus master (hex notation): C9 Address 9 Answer from S48: 6 /0 /0F AI1 value ( /07E /0) Double data communication: 3F hex 3F: AO1=4,92 V From bus master: CA /0 /0 /01 Address /0A hex /0 /08 /0: AO2=313 mv Answer from S48: /0 /0 /01 AI2 value ( /0 /08 /0) Positive values hex 1 /0 /0 /0-7FFF will set the output to 10 V.

8 SIOX S48 ANALOGUE MODULE p 15 SIOX S48 ANALOGUE MODULE p 16 String Mode Communications use the same physical address as the first Data Mode as stored in parameter /01. It provides access to many other functions besides just setting and reading the I/O. The string from the central must therefore contain a parameter number from /0 /0 -FF. A typical communication for setting the analogue value for channel 2, parameter /0D, in String Mode will be: From bus master: C /0 / / /0 3 /0 BE 74 Address 9 write /0D /0 8 /0 /0 Sign-off/Chksm Set Output 2 to /08 /0 /0=5 V Answer from S48: 3 / /0 3 /0 BE 79 /0 8 /0 /0 Sign-off/Checksum Value = /08 /0 /0 (hex) To permanently change the output range to 2-10 V for both AO, a write data = /03 /0 /0 to EEPROM parameter number /0F must be made: From bus master: C /0 / / /0 3 /0 BF 6B Address 9 C F /0 3 /0 /0 Sign-off/Chksm EEPROM write Value /03 /0 /0 (hex) Answer from S48: 3 /0 3 / /0 BF 7D /0 /0 3 /0 Sign-off/Checksum Value /03 /0 /0 (hex) String Text messages can also be handled by an internal PLC application program, e.g. to report alarm events. Please refer to the manual SIOX PROGRAMMABLE CONTROLLER for further information.. Parameter Setup The S48 contains two types of memory: RAM for temporary storage for as long as the module is connected to a power supply, and EEPROM for long-term storage of working modes, trim values, logging/text areas and PLC programs. At power-up, the EEPROM variables are automatically copied to the RAM, and the information is used to control the module. By using Set-Up String Mode commands, any variable may be read or modified at any time, either temporarily in RAM or permanently in EEPROM. In the latter case, the corresponding RAM cells are modified as well. Information in controlling parameters immediately affect the function of the module. A description of each parameter position follows. All parameter values are shown in hexadecimal notation. Pos. Value Function hex hex /0 /0 8xxx Permit New Trim Values in parameters 5A - 7F. 4xxx 2xxx 1xxx Inhibit String Text Mode, where the PLC can submit text answers, making it equal to String Setup Mode. Inhibit Data Mode to prevent unwanted AO changes. 2 Data characters expected in Data Mode, permitting 10-bit output data instead of just 7-bit in single Data Mode. x3xx- Transmission Speed 3-9 = bits/second. -x9xx Other values are invalid and revert to 4800 bits/s. To change, a write to EEPROM must be made, followed by a powerdown/power-up or a soft reset = FFFF sent to this parameter RAM or EEPROM. xx /01-1 to 8 Addresses are accepted in Data Mode, -xx /08 handling 8 AO/AI communications. /01 8xxx Master Flag starting communications defined in parameters 4 /0-59. xx8x Spy inhibit. The spy area 40/-59 will be free for general use. /01xx- Module slave address /01-3F (1-63), current address -3Fxx jumpers, EEPROM or temporary value. xx /02 xx0/4 xx0/8 xx10/ xx1e Sample Interval Thermocouple Compensation A cold junction compensation A/D conversion is performed every second/fourth/eighth/sixteenth normal A/D conversion. External Cold Junction Compensation through turning off the internal compensation.

9 SIOX S48 ANALOGUE MODULE p 17 SIOX S48 ANALOGUE MODULE p 18 Pos. Value Function hex hex Pos. Value Function hex hex /02 /0 /0 /0 /0 Options reserved for customer specific functions. /0 /011- A/D conversion on AI1-AI7 (diff. channels, voltage and current), - /0 /017 e.g. /0 /011 A/D conversion only on AI1, e.g. /0 /012 A/D conversion on AI1 and AI2. /03 /0 /0 /0 /0 Reserved for future use. xx1 /0 xx /08 xx /0 /0 xxx1- -xxx7 Pt 100 Temperature Linearization *C ma Range for AI V Range for AI9-16. Filter 1-60 seconds for AI9-16. /04- /0B 8xxx Mode Control for AI 1-8 & xxx enables two single-end inputs instead of one differential on AI 1/9, 2/10,... 8/16, respectively. /0C- /0D /0 /0 /0 /0- Output Control Values for AO1 - AO2. Negative values are -1 /0 /0 /0 interpreted as /0 /0 /0 /0, high positive values as 1 /0 /0 /0. 4xxx 2-10 V / 0,4-2 V / 4-20 ma Range for AI1-8. /0E- /0F xx /0x Outputs Range 0-10 V for AO1 - AO2. 38xx Thermocouple J Linearization *C. xxx8 Outputs Range 0-20 ma for AO1 - AO2. 3 /0xx Thermocouple K Linearization *C. xx2x Outputs Range 2-10 V / 4-20 ma for AO1 - AO2. 28xx Potentiometer Linearization 0-20 k for AI /0xx 0-2 V Range for AI /0 QQII Dummy Q8...Q1 and I8...I1 bits controlled by the PLC. 18xx NTC Temperature Linearization *C. 11 MMxx Dummy DO MASK bits controlled by the PLC. 1 /0xx Pt 100 Temperature Linearization *C. xxpc PLC Program Counter. /08xx 0-20 ma Range for AI1-8. /0 /0xx 0-10 V Range for AI /0 /0xx- PLC Timer Tick length in 1/1024th seconds. -FFxx /0 /0 = 1/16 s (default), same as 4 /0xx. x1xx- -x7xx Filter 1-60 seconds for AI1-8. xxrr PLC Run Flags, please refer to the manual SIOX PROGRAMMABLE CONTROLLER for further information. xx4x xx28 xx2 /0 xx V / 0,4-2 V / 4-20 ma Range for AI9-16. Potentiometer Linearization 0-20 k for AI V Range for AI9-16. NTC Temperature Linearization *C. 13 XXXX PLC Flag/Accumulator Bits.

10 SIOX S48 ANALOGUE MODULE p 19 SIOX S48 ANALOGUE MODULE p 20 Pos. Value Function hex hex 14 VVVV PLC 16-bit V Accumulator. 15 TTTT PLC T Timer Tick rate is defined in parameter E /0xx- Real Time Clock fine tuning. -1Fxx xx /0 /0- Real Time Clock 10 ms counter, reset at 99*10 ms. -xx63 17 /0 /0 /0 /0- Real Time Clock seconds counter. Setting a new value through -FFFF communication also clears the 10 ms counter in parameter F PLC Application Cells free for general use. Pos. Value Function hex hex 5C 8 /0xx- Common Offset Cold Junction Compensation for 0 *C -7Fxx 80/...0/0/...7F = %. 5D xx8 /0- Current Trim Offset for AO1, 80/...0/0/...7F = %. -xx7f /0 /0xx- Common Trim Gain Cold Junction Compensation. -FFxx xx8 /0- Current Trim Offset for AO2, 80/...0/0/...7F = %. -xx7f 5E xx8 /0- Current Trim Gain for AO1, 80/...0/0/...7F = %. -xx7f 3 / /0 /0 /0- Input Result Values for AI9-16, single-end mode. -7FFF 38-3F 8 /0 /0 /0- Input Result Values for AI1-8, differential or single-end mode. -7FFF 5F F6xx- Common Trim Gain AO F6...0/0/...0/A. - /0Axx xx8 /0- Current Trim Gain for AO2, 80/...0/0/...7F = %. -xx7f 4 /0-59 Communication Parameter Pairs for Spy or PLC use. 5A /0 /0xx- Common Trim Gain Thermocouple K, increases the raw A/D - FFxx value from 0 to 6 %. xx8 /0- Voltage Trim Gain for AO1, 80/...0/0/...7F = %. -xx7f 5B /0 /0xx- Common Trim Gain Thermocouple J, increases the raw A/D - FFxx value from 0 to 6 %. 6 /0-67 /0 /0xx- AI ma Trim Gain, increases the raw A/D value from 0 -FFxx to 6 %. xx8 /0- AI1-8 Cold Junction Compensation Offset, 80/..0/0/..7F = - 12 *C -xx7f 68-6F /0 /0xx- AI ma Trim Gain, increases the raw A/D value from 0 -FFxx to 6 %. xx /0 /0- AI1/9-8/16 10/2 V Trim Gain, increases the raw A/D value -xxff from 0 to 6 %. xx8 /0- Voltage Trim Gain for AO2, 80/...0/0/...7F = %. -xx7f

11 SIOX S48 ANALOGUE MODULE p 21 SIOX S48 ANALOGUE MODULE p 22 Pos. Value Function hex hex 7 /0-77 /0 /0xx- AI9-16 NTC/Pot Trim Gain, increases the raw A/D value -FFxx from 0 to 6 %. xx /0 /0- AI9-16 Pt100 Trim Gain, increases the raw A/D value from -xxff 0 to 6 %. 78-7F /0 /0xx- AI1-8 NTC/Pot Trim Gain, increases the raw A/D value from -FFxx 0 to 6 %. xx /0 /0- AI1-8 Pt100 Trim Gain, increases the raw A/D value from 0 -xxff to 6 %. 8 /0-FF PLC Program Area, please refer to the manual SIOX PROGRAMMA- BLE CONTROLLER for further information.. 10/ /0-3FF Parameters 1/0 /0-3FF are not automatically copied from EE- PROM to RAM at power-up. RAM values are protected from inadvertent changes, while EEPROM data is freely usable for PLC data logging, texts or program overlays. Parameter Specifics Parameter /0 /0, Double Data and Speed The bus master can send messages in Data Mode using either 1 or 2 data characters. S48 can communicate in either mode as described on page 13. The first hex digit in parameter /0 /0 can be set either to /0 or 1 for 1 or 2 data characters to be received in Data Mode. The Transmission Speed is normally 4800 bits/s. To change it, send a Setup String command setting the station's first EEPROM parameter to 9xx for bits/s; 8xx for 9600; 7xx for 4800; 6xx for 2400; 5xx for 1200; 4xx for 600 or 3xx for 300 bits/s. Note, that the speed will not change until after a powerdown/power-up cycle, or a soft reset (FFFF sent to this parameter) has been carried out. Parameter /0 /0, Inhibit String Text The PLC can generate String Text answers, e.g. event values. Older SIOX modules, however, accept String Text as equal to parameter accesses, so this flag permits installing S48 in older systems. Parameter /0 /0, Inhibit Data Mode String Mode transfers are more reliable than Data Mode, and in some cases a Data Mode message could inadvertently change an output. Therefore, setting parameter /0 /0 to 2xxx inhibit any changes by Data Mode, although an answer will still be returned. Parameter /0 /0, Number of Addresses In the same parameter, the number of communication addresses in Data Mode is defined. S48 can use from one to eight addresses, permitting access to all analogue and digital I/O. String Mode can only make use of the first address as defined in parameter /01, irrespective of the number set. Illegal values will revert to 1. Parameter /01, Sample Interval for Cold Junction Compensation The interval is set to default xx /02 which means that a Cold junction Compensation measurement is performed instead of a measurement of the Thermocouple transducer every second time. This interval may be changed to xx /04, xx /08 or xx1 /0. If the parameter contains xx /04 is a Cold Junction Compensation performed every fourth time etc. Parameters /04- /0B, AI Mode Control The two first digits in either parameter selects which type of analogue input signal to expect for AI1-8 in either differential or single-end mode: /0 /0 = - 10 V; /08 = -20 ma; 1 /0 = Pt100; 18 = NTC; 2 /0 = -2 V; 28 = Potentiometer; 30=Thermocouple K; 38=Thermocouple J. Adding 4 /0 = offsetting 20 % of the linear range, i.e V, 4-20 ma. Adding /01 - /07 in either two digits sets a digital filter for the corresponding channel to eliminate noise on the input, from 0,5 s to 60 s. Adding 8/0 changes AI1-8 from differential mode to single-end mode, at the same time permitting the two last digits in either parameter to control AI9-16 as separate single-end inputs. The same modes are selectable as those shown above for the first two digits. Parameters 16-17, Real Time Clock Parameter 17 contains a 16-bit seconds counter and the second half of parameter 16 a prescaler with 10 ms resolution, counting from xx0/0/ to xx63. This may be used by the PLC e.g. as a long period timer or as an alarm time marker. In order to fine tune the counting speed which depends on the CPU clock, the first half of parameter 16 may be preset, preferably in EEPROM. A value between E0/xx and 1Fxx decreases/increases the speed up to -0,5% compared with the default 0/0/xx. Note that the crystal still varies a little with temperature

12 SIOX S48 ANALOGUE MODULE p 23 SIOX S48 ANALOGUE MODULE p 24 etc, so the exact time should be preset from a central from time to time to maintain accuracy. To clarify the unit s internal power and ground system, refer to the drawing below. Any of the PLC instructions DATE (DATM...DATS) changes, when first run, parameter 16 from a seconds counter to a minutes + seconds register with a maximum value of hex 3B3B (59 minutes, 59 seconds). Parameters 5A-7F, AO / AI Trim Values These parameters are preset from factory. To avoid inadvertent changes they can only be written to if 8xxx is set in parameter /0 /0. Power Supply Considerations Using an AC power source requires special attention to how the power is applied. The transformer secondary winding connected to the unit must be floating, that is, no connection to any ground system. The reason is that the bridge rectifier in the module will short-circuit the transformer if there is a connection from either end of the transformer winding to module ground. It can be seen more clearly in the drawing below: Power to the unit is normally applied thru terminals 26 and 27. The internal bridge rectifier connected to these terminals makes it possible to use either an AC or DC power supply. Aternatively, to avoid the diode drop in the negative supply, the unit can be DC-powered thru terminals 26 or 27 and, preferably, using terminal 22 for the negative (ground) supply. After rectification, the positive voltage supplies the internal electronics of the unit. In addition, this supply is connected to terminal 20 which can be used as a positive supply for external devices, for example 4-20 ma current transducers. The maximum load current is 400 ma, restricted by the rectifier bridge. However, in case the unit is AC powered, avoid any external load on the rectified supply as the ripple voltage will increase and eventually affect the operation of the unit or connected transducers. If a short is applied at point 'A', corresponding to a short between ground and one of the transformer wires, diode D1 will be damaged during the negative half period. Preferably, a separate transformer should be used to eliminate the possibility for accidentally shorting any side of the transformer secondary winding to ground. The negative voltage side of the bridge rectifier is connected to the unit s internal ground plane to which the terminals 1, 18 and 22 are connected, as well. Although there are no electrical differences between the ground terminals 1, 18 and 22, their use will differ. The main concern is to avoid undesired currents in ground terminals used as references for analogue measurements. For example, assume we use Pt100 temperature sensors which require connection to a ground terminal for their operation. If the same terminal will be used for the return current from the analogue outputs, there will be a voltage drop introduced in the ground terminal (and possibly in its external wiring) which would introduce an error in the measurements.

13 SIOX S48 ANALOGUE MODULE p 25 SIOX S48 ANALOGUE MODULE p 26 Electrical Specifications (Tamb = 25 *C) Min Typ Max Unit Supply Voltage V DC V AC Supply Current (No AO load) 10 ma Min Typ Max Unit Analogue Input Pt Temperature *C Resolution 0,1 *C Accuracy 0,3 0,5 *C Drift 50 ppm/*c Analogue Input Voltage V Common-Mode Voltage V Resolution 2,5 mv Accuracy (of full scale) ¼ 0,5 % Drift, Single Ended Input 100 ppm/*c Drift, Differential Input 70 ppm/*c Analogue Input Current ma Input Impedance 230 Common-Mode Voltage V Resolution 4,9 µa Accuracy (of full scale) ¼ 1 % Drift, Single Ended Input 130 ppm/*c Drift, Differential Input 100 ppm/*c Input voltage (protection limit) 30 V Analogue Input NTC/Pot 332 0,18 k Temperature *C Resolution 0,1 *C Accuracy, excluding transducer 0,1 0,2 *C transducer with B=3900, +-5% 1,3 8 *C Drift 20 ppm/*c Thermocouple Input with 100 jumpered to GND V/Max 30mA with remote grounding V/Max 10µA Common-Mode Voltage V Resolution 1 *C Accuracy 1 2,5 *C Drift 50 ppm/*c Analogue Output Voltage 0 10 V Load Current 5 ma Output Noise 60 mv pp Analogue Output Current 0 20 ma Load Impedance (24 V supply ) 500 Load Impedance (12 V supply ) 20 Analogue Output Resolution 10 bits Accuracy 25 *C (of full scale) ¼ 1 % Accuracy 2-10 V Range (of full scale) 1 2 % Accuracy 4-20 ma Range (of full scale) 1 2 % Drift 70 ppm/*c

14 SIOX S48 ANALOGUE MODULE p 27 Analogue Input Conversion Time Min Typ Max Unit 8 differential inputs (without filter) 560 ms 16 single ended inputs (without filter) 1060 ms 3 differential inputs (option hex /0 /013, without filter) 250 ms Environmental Specifications Operating Temperature Range *C Cold Junction Compensation Range *C Storage Temperature Range *C Mechanical Specifications Dimensions (excl DIN clip) 139 x 81 x 25 mm Weight 230 g Revisions Rev.0 Rev.1 Rev.2 Rev.4 Rev.6 Rev.7 First card layout 2 AO added +-5 V trim capability Shielding plate 2K EEPROM, AI EMI filters, Reference output current limited, improved GND layer. Added current mode input protection. Improved detection of sensor failures (Pt100/Thermocouple modes). Flash CPU introduced.