Sierra Monitor Corporation 5100-06-IT - Manual (Page 14)

Model 5100-XX-IT Toxic Gas Sensor Module
Page: 10
4.3 ENCLOSURE INSTALLATION
To protect the transmitter and sensor assembly they should be removed from the enclosure and preserved
until final installation and wiring termination.
Prior to installation and wiring:
1. Remove the transmitter from the module housing by:
• Unscrew the two captive panel screws on the faceplate.
• Lift the transmitter out of the enclosure.
• Unplug the sensor cable from transmitter connector P2.
• Remove the sensor assembly from the enclosure hub.
2. Install the module enclosure onto the end of the supply conduit and/or bolt into position as required.
NOTE
When enclosure earth grounding is required for the installation a grounding lug is located in
the base of the enclosure. Install the earth ground under the green ground screw.
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 Figure 4-3 and Table 4-4.
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 and push
together.
5. Turn 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.
Number
of
modules
Maximum length of wire run (feet)
500 1,000 2,000 3,000 5,000
1 18 18 16 16 14
2 18 18 14 12 xx
3 18 16 12 xx xx
4 16 14 12 xx xx
Table 4 - 2: Minimum Wire Gauges
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 -