EF-GasNet Addressable Gas Monitoring System

Key Features
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

Sensor points

1 - 32

Measurements

Combustible Gas - L.E.L., % vol

Toxic Gas - ppm, % vol

Oxygen - % vol - Depletion/Enrichment

Refrigerant - Alarm

Any 4 - 20mA transmitter

Power Consumption

230/115v AC or 24v DC

Control unit - 7.5w quiescent 17w full alarm condition

Sensor - 2.5w

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

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.

Internal audible alarms

Alarm/Fault - permanent mute option

Outputs - sensor safe area

Relay D.P.C.O. N/D

Optional digital display card, internal alarm LED and sounder

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

Environmental

Control unit - IP52 option IP65

Operating temperature -10 + 50˚C

Humidity -0 to 90RH

Miscellaneous

Enclosure cable entry - bottom, rear, top

Alarm relays - automatic inhibit during service periods

Dimensions

310W x 265H x 75D mm (Weight:- 4.9Kg)

Option - front cover lock

Option - standby power supply

Snoop Panel

4 relays user selectable D.P.C.O. sensor zoning and voting

4 analogue outputs 4~20mA selectable for any sensor combination

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

Downloads

Datasheets

Contact Us