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MGS-402 User Manual
2.5 Components
Figure 2-3 -
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1
2
3
4
5
6
7
2.6 Communication Features
The 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.
6
MGS-402 Layout
Component Description
Analog Outputs (×2)
Modbus to Gas Detectors
Modbus to BMS
Remote Silence
Audible Alarm
Fault Relay
High Alarm Relay
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Component Description
8
Low Alarm Relay
9
AC Power Line Input
10
Power Supply
11
Sensor Power Connections (×2)
12
M20 Cable Glands (×2)
13
M16 Cable Glands (×6)
1100-2570 Rev 1
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