Crowcon Gasmaster 4 - Gas Detection Control Panel
This Crowcon Wall mounted control unit with LCD display is for up to four 4-20mA or mV pellistor-type gas detectors, fire zones (up to 20 heat/smoke detectors or call points per zone), flame detectors or ESU sampling units. It features RS-485 Modbus communications for DCS/PLC/SCADA connection, event logging, as well as dedicated drives for 12/24Vdc audible/visual alarms.
Double-pole relays with contacts rated 8A 250Vac (non-inductive) are supplied to indicate Alarm 1, Alarm 2 and Fault. 4-20mA or 1-5Vdc analogue outputs are provided per channel. Gasmaster operates from 90-264Vac and has 1.2Ah back-up batteries fitted as standard.
Display language options are available: English (as standard), French, Dutch, Spanish, German, Italian, Czech and Polish. If the display is required in a language other than English, please state the language clearly on the order.
- IP65 Rated
- Multi-language display options
Gasmaster 1 |
Gasmaster 4 |
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Size |
288 x 278 x 110mm (11.3 x 10.9 x 4.3 inches) |
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Weight |
4.5kg (10lbs) |
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Enclosure material |
Back-box: cast aluminium |
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Ingress protection |
IP65 |
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Power |
100-240Vac 50-60Hz or |
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Battery back-up |
1.2Ah batteries fitted internally |
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Operating temperature |
-10°C to +50°C (14°F to +122°F) |
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Inputs |
Gas One 2 or 3 wire 4-20mA gas detector (sink or source) or mV pellistor flammable gas detector |
One to four 2 or 3 wire 4-20mA gas detectors (sink or source) or mV pellistor flammable gas detectors |
Fire One loop of up to 20 conventional smoke/heat detectors or manual call points, or one flame detector (4-20mA or digital contact signal) |
One to four loops of up to 20 conventional smoke/heat detectors or manual call points, or one to four flame detectors |
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ESU For use with one Crowcon ESU fan |
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Remote inhibit/retest Via normally open contact |
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Outputs |
Relays DPCO contacts rated 250Vac 8A |
Low alarm and high alarm per channel plus common low, high and fault. Alarm relays can be set for rising or falling alarms. Hysteresis can be adjusted on low alarms |
A/V alarm drive 12Vdc or 24Vdc 650mA max. drive. Suitable for +ve or -ve switched alarms |
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Analogue 4-20mA (current source, max. loop resistance 700?) or 1-5Vdc (min. load 50k? ) |
4-20mA for each channel (current source, max. loop resistance 700?) or 1-5Vdc (min. load 50k?) |
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Serial link RS-485 Modbus RTU for monitoring and control via DCS/SCADA/PLC systems |
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Communications port |
Optional port for PC configuration and event log upload |
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Event logging* |
Time-stamped log of up to 300 alarms, fault or system intervention activities |
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Panel indication |
LCD back-lit display shows gas level (in ppb, ppm, % volume or % LEL units), and scrolling alpha-numeric status indication. |
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Approvals |
EMC: EN50270, EN60945, FCC: CFR 47 Part 15; ICES – 003 |
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Functional safety |
Validated to IEC61508 |