Справочник Пользователя для Sierra Monitor Corporation 2-Wire Series

 

The sensor module is comprised of the following three primary components: 

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. 

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. 

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. 

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.   

The 4501-XX module operates on DC power between 14 VDC and 30 VDC.  The DC power must be supplied 
by the loop controller.