Oldham WX16, Руководство пользователя

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WX16 User Manual | 32
Figure 3.4
3.1.3 Optional *Bridge Sensor Input Board
#10-0191
An optional 8-channel, 12 bit Bridge Sensor Input board allows these popular gas
detectors to be connected directly to the WX16 without additional signal conditioning or
transmitters. Up to four dual channel 10-0192 modules may be installed in each 8-
channel 10-0191. Each 10-0192 channel is equipped with a bridge amplifier and
balance potentiometer and an adjustable switching regulator for setting the correct
sensor excitation voltage. A 3 position coarse gain jumper allows setting the gain of the
bridge amplifier. Fault supervision circuitry forces the WX16 into a FAULT condition
upon sensor failure or removal.
This option may also be configured to accept 4-20mA inputs for mixing bridge sensors
and current loops into the same board. Placing any channel’s 2 position LEL/4-20mA