User manual

Digital Monitor AMC-1DBx Series User Manual
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4 PRODUCT DESCRIPTION
This section provides a general product description about the AMC-1DBx gas monitor.
4.1 GENERAL DESCRIPTION
The Gas Monitor AMC-1DBx provides for the power and monitoring of attached sensors.
Initially, the communications with the sensors is via digital highways employing
RS-485/MODBUS. Actions such as relay activation and/or alarm notification result from
information from the sensors, combined with user configurations (i.e. thresholds and timers).
User displays provide detailed information on the operation of the monitor and attached devices.
The system state/status is reported to supervisory systems through the use of multiple
interfaces; contact transfer on relays, current loop interfaces, and digital communications
employing protocols such as BACnet and MODBUS.
The digital monitor communicates with the digital devices (i.e. AMC400 transmitter/sensors)
over RS-485. The monitor supports four (4) RS-485 interfaces for this purpose. Up to 988
transmitter/sensors are supported. The monitor also provides 24VDC power for powering a
limited number transmitters/sensors (up to 20 AMC-400).
The AMC-1DBx Digital Monitor provides the following functionality:
• Automatic scanning of up to 988 AMC-400 network sensors
• Sensors may be assigned to any of 128 zones.
• 4 integral analog outputs plus up to 2, AMC-1D-8R (2 cards per downstream interface)
with 2 analog outputs per card. One analog output is assignable to each zone to reflect
the zone’s maximum or average gas concentration.
• Independent alarms per zone; ALARM1, ALARM2 ALARM3 and FAIL.
• Triple threshold alarm set points; alarm ON and alarm OFF gas concentrations.
• Alarm thresholds may be independently set for each individual transmitter/sensor.
• 16 integral SPDT 10A relays plus up to 8 AMC-1D-8R (2 cards per downstream
interface) with 8 relays each per card . Each relay is user selectable to be linked to any
combination of sensor sources: ALARM3, ALARM2 ALARM1 and FAIL for all 128
zones.
• Independent sensor activation delay to turn ON relays, minimum run time and post run
time delays to turn Off relays.
• Four RS-485 / MODBUS highways to communicate with MODBUS slaves (AMC-400
transmitters and relay modules).
• Front panel LCD and membrane keypad user interface.