Sierra Monitor Corporation 4501-05 - Manual (Page 11)

Model 4501-XX Toxic Gas Sensor Module
Page 7 of 35
Figure 4 - 2: 4-20 mA Connection
4.2 WIRING
• Wire should be 18 AWG minimum at a maximum distance is 5,000 feet. Install conduit as required by
local code or construction specifications.
• See figure 4-2 for typical 2 terminal and 4 terminal connections.
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 J1.
• 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.