621 Signal Conditioner Pin-outs

Signal Conditioner (J1) Connector
Power Supply Readout 15-pin Type "D" Connector (male)
Pin Description
1 No Connection
2 Pressure Output
3 Trip Point 1 Level
4 Trip Point 2 Level
5 15 V Return
6 -15 VDC
7 +15 VDC
8 No Connection
9 mA (+)
10 mA (-)
11 Heater Alarm Relay Common
12 Output Return
13 Heater Alarm Relay Normally Closed
14 Heater Alarm Relay Normally Open
15 Chassis Ground
Signal Conditioner Terminal Block (J4)
Pin Description
1 Trip Point 1 Relay Normally Closed
2 Trip Point 1 Relay Common
3 Trip Point 1 Relay Normally Open
4 Trip Point 2 Relay Normally Closed
5 Trip Point 2 Relay Common
6 Trip Point 2 Relay Normally Open
7 Trip Point Level Return
8 Trip Point 1 Level
9 Trip Point 2 Level

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