READ THESE INSTRUCTIONS BEFORE YOU BEGIN INSTALLATION. Ground yourself before touching board. Some components are static sensitive.

Transcription

1 EMC PNP-4DI LonWorks to PID Modulated Pressure Output INSTALLATION READ THESE INSTRUCTIONS BEFORE YOU BEGIN INSTALLATION. Ground yourself before touching board. Some components are static sensitive. MOUNTING: Circuit board may be mounted in any position. If circuit board slides out of snap track, a nonconductive stop may be required. Use only fingers to remove board from snap track. Slide out of snap track or push against side of snap track and lift that side of the circuit board to remove. Do not flex board. Use no tools. POWER CONNECTIONS - THIS PRODUCT ACCEPTS 24 VOLTS AC OR DC POWER. Be sure to follow all local and electrical codes. Refer to wiring diagram for connection information. 1) The secondary supply voltage to the interface should be isolated from earth ground, chassis ground, and neutral leg of the primary winding. Any field device connected to this transformer must use the same common. If you are not sure of other field device configuration, use separate transformers. Failure to follow these procedures can result in improper operation. 2) If the 24 volt AC power is shared with devices that have coils such as relays, solenoids, or other inductors, each coil must have an MOV, AC Transorb, or other spike snubbing device across each of the shared coils. Without these snubbers, coils produce very large voltage spikes when de-energizing that can cause malfunction or destruction of electronic circuits. 3) If the 24 volt DC power is shared with devices that have coils such as relays, solenoids, or other inductors, each coil must have an MOV, DC Transorb, or a diode placed across the coil or inductor. The cathode or banded side of the diode (or DC Transorb) connects to the positive side of the power supply. 1

2 CHECKOUT PROTOCOL 4) You should measure the actual voltage output of the secondary. If the output is not fully loaded you may read a higher voltage than the circuit board can handle. Do not apply power without main air supply provided. Warranty does not include malfunction due to clogged valve. Main air port is filtered with the supplied micron integral-in-barb filter. Periodically check the filter for contamination and flow reduction, and clean with a brush or replace if needed (Part # PN004). The surface between the manifold and pressure transducer is a pressure seal. Minimize stress between the circuit board and the manifold by holding the manifold in one hand while installing pneumatic tubing onto the fittings, and use care when removing tubing to avoid damaging fittings or moving manifold. This unit requires at least two cubic inches (minimum) of branch air line capacity to operate without oscillation. Field calibration voids warranty. Connect main air supply and branch tubing to barbed fittings. Connect LonWorks network twisted pair. With power off, connect power to 24V (+) and C (-). When power is applied the LED power indicator will light and the green service LED will blink once rapidly and turn off. This indicates the EMC PNP-4DI is functioning properly. Any other LED action indicates a malfunction. Apply minimum and maximum input signals and measure response. Response between the minimum and maximum values will be linear, therefore software algorithms are easy to derive. The EMC PNP-4DI can be interrogated over the LonWorks bus for the actual output pressure. The green LED will illuminate when the service switch is pressed to identify the node to the network, and anytime a WINK command is received. Turn the selector switch to OFF and operate the push-buttons. They should have no affect on the output and the output should be at minimum pressure (watch pressure gauge). Turn the selector switch to MANUAL and operate the push-buttons. You should be able to increase and decrease the branch pressure output. Note: The minimum and maximum pressure must have been previously set via the network computer. Turn the selector switch to LOCAL. Have someone monitor the set-point (Network Variable 10) at the computer as you increase and decrease the set-point with the UP/DOWN buttons. Turn the selector switch to REMOTE and have someone attempt to change the value of the set-point (Network Variable 3) from the computer. Leave switch in REMOTE for normal operation. The EMC PNP-4DI incorporates two valves and is not a constant bleed controller. Its branch exhaust flow and response time is not limited by an internal restrictor and is similar to its load rate. If power to the EMC PNP-4DI is lost, the EMC PNP-4DI will not exhaust air from the branch line. The EMC PNP-4DI is ideal for long branch line runs, multiple actuators, and outside air dampers because of it s 750 scim capacity. EMC PNP-4DI Network Variable Description EMC PID LOOP NVO Input network variable nvi00request Type: SNVT_obj_request Declaration: network input 1. ) Default: NA Range: RQ_NORMAL, RQ_DISABLED, RQ_UPDATE_STATUS,RQ_REPORT_MASK Purpose: Request current status of node 2

3 NV1 Output network variable nv00status Type: SNVT_obj_status Declaration: network output 2. ) Default: NA Range: 0-11 (for object_id field) 0,1 for all other active fields Purpose: Response to status request NV2 Input network variable nvioperating_mode Type: SNVT_lev_disc Declaration: network input 1. ) Default: Switch Setting Range: ST_OFF(0), ST_LOW(1), ST_MED(2), ST_HIGH(3) Purpose: override the mode of PNP_4DI LOCAL = ST_HIGH (3) REMOTE = ST_MED (2) MANUAL = ST_LOW (1) OFF = ST_OFF (0) NV3 Input network variable nviset_point Declaration: network input 1. ) Default: 4000 Range: F.01 resolution Purpose: Temperature set-point desired NV4 Input network variable nviprocess_var Declaration: network input 1. ) Range: F.01 Resolution Purpose: Feedback temperature i.e. actual temperature NV5 Input network variable nviprop_band Declaration: network input 1. ) Range: Purpose: Proportional Gain control 3

4 NV6 input network variable nvireset_rate Declaration: network input 1. ) Range: Purpose: Reset Gain Control. NV7 Input network variable nvimax_pressure Type: SNVT_press * Units not kpa. EMC defined as PSI Declaration: network input 1. ) Range: Resolution Purpose: Sets the maximum pressure the EMC PNP-4DI can achieve NV8 Input network variable nvimin_pressure Type: SNVT_press *Units not kpa. EMC defined as PSI Declaration: network input 1. ) Range: resolution Purpose: Sets the minimum pressure the EMC PNP-4DI will allow. NV9 Output network variable nvoreport_press Type: SNVT_press *Units not in kpa. EMC defined as PSI Declaration: network input 1. ) Range: resolution Purpose: Actual pressure reading from EMC PNP-4DI NV10 output network variable nvoreport_sp _p Declaration: network output 1. ) Default: none Range: 40 to 160 C Purpose: Reports the set-point temperature the EMC PNP-4DI is maintaining. 4

5 NV11 output network variable nvoreport_mode Type: SNVT_lev_disc Declaration: network output 1. ) Default: none Range: 0-3 See nvioperatingmode Purpose: Reports the mode setting of the EMC PNP-4DI NV12 input network variable nviscan_time Declaration: network output 1. ) Range: Purpose: Sets the scan time of the PID loop. NV13 input network variable nvodefault_sp Declaration: network input 1. ) Default: 4000 Range: O F.01 resolution Purpose: Reset the default temperature setpoint desired. Supply Voltage 24 VAC (+/- 10%) or 24 VDC (+10/-5%) Supply Current 150 ma maximum Air Supply Supply Pressure 25 psig maximum (operating 20 psig) Air Consumption None Output Pressure Range Calibrated for 0-15 psig 5