Gasmonitor Plus is Crowcon’s flexible 19" rack-based control system. This microprocessor-controlled unit is used throughout the world, both onshore and offshore. Gasmonitor Plus can monitor up to 16 gas detectors or 32 fire zones per rack. Racks can be supplied separately, or built into wall mounting or floor standing enclosures.

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Quick Overview

Simple to use

All day-to-day functions are available from the front panel - push buttons for simple operation
Unique bar-graph display per channel - provides instant representation of gas concentrations
Common alarm LEDs on the display card - the whole rack status can be checked at a glance.

Flexible architecture

System is limitlessly expandable
Modular construction - ultimate customisation and minimal wiring
Industry-standard analogue outputs - will integrate fully with existing rack-mounted protection systems on-site
Optional relay modules - flexible and cuts down on configuration and monitoring cabling

Easy maintenance

Each channel is inhibited separately - plant safety is not compromised during checks
Routine calibration from front panel - reduces service overheads by half
One universal gas card - reduces spares holding

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Details

Specifications

Size	483 x 133 x 294 mm (19.0 x 5.25 x 11.5 ins)
Weight	9.5 kg (21 lbs)
Enclosure material	Aluminium alloy
Mounting	Rack mounted (3u format). Wall mounted and floor standing cabinets are optional, dimensions on request.
Channels	16 per rack
Operating temperature	0°C to +50°C (32°F to +122°F)
Humidity	0-95% non-condensing
Inputs	Gas 2 or 3 wire 4-20mA (sink or source), or mV bridge
	Fire - smoke & heat detectors, manual call-points Maximum of 32 loopes per rack (ie 16 twin zone fire modules)
Outputs	Analogue 16 x 4-20mA, max. load 960 Ohms or 1-5 V, min. load 100 Ohms
	External audible/visual alarm drive Powered 24 V dc, max load up to 200mA for each alarm level.
Relays	Type Up to 84 DPCO contacts rated 5 A @ 250 V ac, non-inductive load
	Assignment - Common Alarm 1, Alarm 2, Alarm 3, Fault - Per channel Gas alarms 1, 2 & 3, fire & fault - Voting Up to 16, configurable - Relay modes Energised/de-energised, latched/non-latched, time-delayed, pulsed
Digital communications	DCS/PLC/PC/Local configuration link: RS-232
Event logging	Built-in datalogger - data available via communication links
Panel indication	Channel number: 4 lines x 20 characters back-lit LCD display Gas reading: as above plus green LED bar-graph Measurement units: % LEL, ppm, % Vol, Fire System fault - integrity watchdog: Yellow LED
Alarm indication	Visual - Alarm: 3 individual & 3 common alarms (red LED); Fault - individual & common fault (yellow LED); Inhibit - individual inhibit (yellow LED)
Power	AC mains: 100 - 260 V ac 50/60 Hz external DC: 27.6 V Battery back-up: external
Approvals	Low voltage directive - EN61010-1 RF immunity - EN 50082-1 RF emissions - EN 50081-1