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AT-MGS-402 User Manual
2. Product Description
2.1 Product Overview
The AT-MGS-402 Gas Detection Controller displays centralized information about the status of connected
AT-MGS-410 gas detectors. The AT-MGS-402 is connected to the AT-MGS-410s via Modbus RTU.
The AT-MGS-402 can be used to provide power to each connected AT-MGS-410 gas detector, negating the
need for separate power supply at the location of the gas detector.
The AT-MGS-402 displays status via a bank of LEDs that represent the channel/sensor connected to it. Each
channel/sensor has a row of dedicated LEDs to indicate the status of the sensor:
Power
Fault
Low alarm
High alarm
The AT-MGS-402 provides three relays
(fault, low and high alarm status)
for connection to auxiliary systems,
ventilation or other equipment.
The AT-MGS-402 has an integrated visual alarm of LEDs around the perimeter of the controller that will
activate when a low or high alarm is received from either channel. In addition, the integrated audible alarm
will activate in the same manner.
In addition to being a Modbus master to the AT-MGS-410 gas sensors, the AT-MGS-402 acts as a Modbus
slave for ease of integration into a building automation system
(BMS)
or programmable logic controller
(PLC)
.
The controller also features two analog outputs which may enable monitoring gas detector levels remotely.
Figure 2-1 -
The AT-MGS-402 Gas Controller System
