4.4 Transmitter and Sensor Installation
When all pre-wire is complete:
1. Install sensor assembly in the open hub on the module enclosure. The sensor assembly thread must be fully seated
into the hub and tightened to maintain explosion proof assembly.
2. Connect the wires which return to the controller to interface board connectors P1, P2, P3 and P4 according to
Section 4.5 Module Address Switch and as detailed in the connector tables below.
3. Connect the sensor assembly cable to top transmitter board connector P2.
4. Align the headers between the top transmitter board and the lower interface board then push together.
5. Turn the rotary switch to correct sensor address if required.
6. Carefully return the transmitter to the enclosure, installing it over the two stand-off’s. Tighten the retaining screws into
the stand-offs.
7. Cycle power to accept module address change.
8. Establish the module address according to Section 4.5 Module Address Switch.
P1 PCB Label Function
1
Switch
IN + Digital Input SW +
2 IN - Digital Input SW -
3 4-20 IN + 4-20 mA Input +
4 IN - 4-20 mA Input -
5 GND Ground
6
4-20
OUT + 4-20 mA Output +
7 OUT - 4-20 mA Output -
P2
1
RS 485
+ RS 485 (+) (A)
2 - RS 485 (-) (B)
3 S RS 485 shield (Isolated GND)
4 + RS 485 (+) (A)
5 - RS 485 (-) (B)
6 S RS 485 shield (Isolated GND)
P3B
1 P VDC Power
2 S Sentry Signal or Communication
3 G VDC Ground
P3A
4 P VDC Power
5 S Sentry Signal or Communication
6 G VDC Ground
16 SMC 5100-XX-IT Toxic Gas Detector Module
4 Installation US
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