Key Features
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]- Up to 32 addressable sensors
- Automatic safety check diagnostics/system surveillance
- Conventional 3 core or single 4 core sensor network
- Front panel push button function adjustment
- Continuous display of operating conditions
Overview
Gas Net has been designed to operate in the full range of environments from commercial premises through to heavy industrial applications which may require hazardous area sensing. Typical monitor locations are – public buildings, car parks, tunnels, breweries, boiler plant rooms, water treatment works, H&V control, manufacturing, process plants, horticulture, hotels, and offices.
Operation
Each gas sensor continuously monitors the atmosphere, reporting any hazardous conditions to the control unit, for display by the alpha numeric screen indicating the reporting sensor, gas type, concentration and alarm status. Alarm levels that are exceeded will automatically activate a variety of signal outputs including analogue/digital data and user selectable relays.
The Gas Net system operates on a single 4-core cable network and has the capacity to monitor up to 32 addressable sensors of various gas types. Larger systems offering unlimited sensors can be achieved using multiple Gas Nets housed in a 19” rack based system. The Gas Net is supplied ready to use with pre-calibrated gas sensors and provides for additional sensors that can be easily added to any point of the network. When local indication/alarm functions are required, any number of Snoop remote alarm panels may be connected, offering repeat functions of the main panel.
Additional Features
- Sensor reading – peak hold
- Versatile sensor configuration
- One man calibration utilising data storage
- Sensors easily removed or added
- Low cost installation
- Programming – secondary access code protection
- Three alarm trip points
- 16 user selectable alarm relays
Tech Specs
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Sensor points 1 – 32 |
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Measurements Combustible Gas – L.E.L., % vol Toxic Gas – ppm, % vol Oxygen – % vol – Depletion/Enrichment Refrigerant – Alarm Any 4 – 20mA transmitter |
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Power Consumption 230/115v AC or 24v DC Control unit – 7.5w quiescent 17w full alarm condition Sensor – 2.5w |
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Indicators – control unit Dot matrix liquid crystal display 4 lines indicating:- sensor address, gas type, concentration (rising or falling), peak hold, alarm status, system fault, sensor fault, line fault, relay inhibit Power – Twin Green L.E.D’s larm – Twin Red L.E.D’s Fault – Twin Amber L.E.D’s |
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Outputs 16 Relays user selectable. S.P.C.O. Relay 1 pre-set – Common low alarm (1st alarm stage) Relay 2 pre-set – Common high alarm (2nd alarm stage) Relay 3 pre-set – Common over-range alarm (3rd alarm stage) Fault – Common relay 17- S.P.C.O. N/E – N/D option Mains fail relay – S.P.C.O. N/E All contacts rated @ 5A-230v AC Relays 1-16 user selectable normally energised or de-energised, latched or unlatched Relays 1-16 user selectable for any arrangement of sensor zone 9 way D type socket for RS232 communication General alarm relay – resetable S.P.C.O. |
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Internal audible alarms Alarm/Fault – permanent mute option |
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Outputs – sensor safe area Relay D.P.C.O. N/D Optional digital display card, internal alarm LED and sounder |
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Sensor Cable Main network – 4 core (2 power – 2 comms) 1.5mm2 screened max length 1km Outstation – 3 core 1.5mm2 screened max length 1km |
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Environmental Control unit – IP52 option IP65 Operating temperature -10 + 50˚C Humidity -0 to 90RH |
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Miscellaneous Enclosure cable entry – bottom, rear, top Alarm relays – automatic inhibit during service periods |
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Dimensions 310W x 265H x 75D mm (Weight:- 4.9Kg) Option – front cover lock Option – standby power supply |
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Snoop Panel 4 relays user selectable D.P.C.O. sensor zoning and voting 4 analogue outputs 4~20mA selectable for any sensor combination |
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Dimensions 200W x 120H x 60D mm (Weight:- 0.55Kg) |
Part Codes
| 130-100 | Gasnet Control Unit |
| 200-003 | Auxiliary Power Supply 11A@24vDC, (20 to 32 Sensors) 11A @ 24v DC |
| 200-005 | Auxiliary Power Supply 2.5A@24vDC, (Booster) 2.5A |
| 130-500 | Gasnet Snoop Box |
| 007-310 | Battery Backup Unit |
| 135-012 | Gasnet Data Logging Kit, Software + Comms Upgrade IC + PC Lead |
| 135-001 | Gasnet Control Unit, 19″ 3U rack 1-32 Enclosure |
| 135-002 | Gasnet Control Unit, 19″ 6U rack 1-64 Enclosure |
| 135-003 | Gasnet Control Unit, 19″ 9U rack 1-96 Enclosure |
| 135-004 | Gasnet Control Unit, 19″ 12U rack 1-128 Enclosure |
| 135-005 | Gasnet Control Unit, 19″ 15U rack 1-160 Enclosure |
| 135-011 | Gasnet 19″ 3U Chassis Tray, Motherboard, Front Panel + Label |