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Model 4501-XX Toxic Gas Sensor Module
Page: 2
1.4 MECHANICAL
The sensor module is comprised of the following three primary components:
1.4.1 ENCLOSURE
Explosion proof, rain-tight stainless steel electrical housing with three ¾” FNPT conduit hubs. The
enclosure cover has a viewing window. The 3 conduit hubs combined with the rotatable faceplate enable
the user to mount the module in a variety of configurations. See Figure 1-2 for details.
1.4.2 TRANSMITTER ELECTRONICS
Electronic Assembly consisting of one printed circuit board assembly mounted under a cover plate. Wiring
connections for power and signal interface are located on the back side of the display.
1.4.3 SENSOR ASSEMBLY
The sensor assembly includes a stainless steel, explosion proof, housing containing the gas sensor and a
wiring harness for connection to the transmitter. The sensor assembly threads into one hub of the
enclosure. The exposed end of the sensor assembly is threaded to allow connection of a rain-shield or
calibration gas delivery fitting.
1.5 INTERCONNECT WIRING
Not supplied with the sensor module, but necessary to the installation and operation is the two conductor
wiring which connects the module to its power source and controller. Before this wiring is installed it is
important to read and understand the control system installation instructions to determine wiring requirements
and alternatives.
1.6 POWER REQUIREMENTS
The 4501-XX module operates on DC power between 14 VDC and 30 VDC. The DC power must be supplied
by the loop controller.