BACHARACH MGS-401 User Manual
higher level BMS controller and a Modbus Sensors for connection to the monitors sensor(s). Follow
standard Modbus practices for these connections. The Modbus configuration to the BMS and the Sensors
or gas detectors must be completed. See section 4.1, MGS-401 Configuration for Modbus settings.
3.6.2
The alarm relay is rated 10A, 24V AC/DC and will respond to either high alarms (factory default) or, in
addition, low alarms. In addition, the relay will change state and alarm if there are any faults detected
with the MGS-401 Entrance Monitor or with any of the connected gas detectors. The relay can also be
configured for failsafe response. See section 4.2, MGS-401 Configuration for relay settings.
3.6.3
The Remote silence alarm input is a terminal block where a momentary pushbutton/remote silence input
would typically be connected is a normally open connection. The pushbutton, in a remote location, is
used for personnel to silence the audible alarm momentarily with visual alarms still activated. The
audible alarm will reengage if the alarm condition hasn’t been cleared in 30 minutes. See section 4.2,
MGS-401 Configuration for Remote Silence settings.
3.6.4
The Forced alarm input is terminal block where a momentary pushbutton/forced alarm input would
typically be connected is a normally open pushbutton. The pushbutton, in a remote location, is used for
personnel to force an alarm on the system to alert others of a potentially unsafe situation. The forced
alarm will cause the gas detection system to engage both audible and visual alarm. See section 4.2, MGS-
401 Configuration for Forced alarm settings.
3.6.5
The Buzzer output is a parallel connection to the on-board >80dB audible alarm. This terminal block is
used if an additional buzzer is needed for a remote location. The remote buzzer will activate and be
silenced as the on-board buzzer is configured.
