Electrical Connections
Pin number
1
2
3
4
5
6
11
12
13
14
15
PHD-4 Portable Helium Detector User Manual
Technical Information
Electrical Connections
Signal
Analog out (+)
RS232 TX
RS232 RX
Remote IN
RS232 GND
Analog out (-)
Relay 1 N.O.
Relay 2 N.O.
Relay 3 N.O.
Relay 4 N.O.
Relay common
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