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AT-MGS-402 User Manual
2.5 Components
Figure 2-3 -
AT-MGS-402 Layout
#
Component Description
#
Component Description
1
Analog Outputs
(×2)
8
Low Alarm Relay
2
Modbus to Gas Detectors
9
AC Power Line Input
3
Modbus to BMS
10
Power Supply
4
Remote Silence
11
Sensor Power Connections
(×2)
5
Audible Alarm
12
M20 Cable Glands
(×2)
6
Fault Relay
13
M16 Cable Glands
(×6)
7
High Alarm Relay
2.6 Communication Features
The AT-MGS-402 Gas Detection Controller features full two-way communications via an RS-485 interface.
Modbus RTU is the communication protocol standard.
The controller is configured as a Modbus master and can be the centralized controller for a two sensor gas
network and also has a Modbus slave port for connection to a BMS / fire safety panel for a complete gas
detection solution.
