SINGLE SENSOR GAS DETECTION SYSTEM

SINGLE SENSOR GAS DETECTION SYSTEM

Two detector channels:Channel 1: mV Bridge Channel 2: 4~20mA
Traffic light status display
Data logging
Three alarm stages + relays
4~20mA analogue output
Front panel access to set up and maintenance of parameters
Weatherproof
Internal or remote sensor options
Options: Cable entry 25mm, 3/4 NPT
Aspirated sensor option
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A fixed dual sensor gas alarm unit that meets the requirements for economic and reliable monitoring of gas levels in a wide range of environments, from commercial premises through to heavy industrial applications that may require hazardous area sensing. The GDS102 may be utilised as a standalone unit or as an addressable sensor forming part of the GDS Combi CANbus addressable network system and therefore offering the features of our most advanced system.Typical monitor locations are – public buildings, boiler plant rooms, swimming pools, water treatment works,H&V control systems, manufacturing and process plants.

Measuring Range

  • Combustible Gas – LEL, % Vol
  • Toxic Gas – ppm
  • Oxygen – % vol – Depletion/Enrichment
  • Any 4~20mA source input signa

Indicators

  • Two line alphanumeric backlit display
  • System Normal – Green / Blue display
  • Alarm 1 (Low Alarm) text
  • Red screen flashing 1 sec + sounder
  • Alarm 2 (High Alarm) text
  • Red screen flashing 0.5 sec + sounder
  • Alarm 3 (Overrange Alarm) text
  • Red screen flashing 0.25 sec + sounder
  • Fault
  • Amber screen flashing + sounder

Power Supply

  • 24v nominal 18v to 30v DC
  • Mains 100~240vAC 50/60 Hz
  • The two voltages may be utilised simultaneously –
  • standby supply

Alarm Settings

  • Digital setting
  • Delay to alarms 0~255s
  • Relay off delays 0~255s

GDS Sensor Types

  • Catalytic - 4~20mA / mV Bridge
  • Electrochemical - 4~20mA
  • Infrared - 4~20mA / mV Bridge
  • PID - 4~20mA / mV Bridge
  • Semiconductor - 4~20mA / mV Bridge
  • E-Stop - 4~20mA / mV Bridge

Sensor Cable

  • 3 core standard, 2 core option for simple electrochemical
  • transmitters, 1mm2 screened – 500m

Sensor Inputs

  • (CH1) Bridge type direct 3 wire detector mV signal
  • (Catalytic, IR, PID, Semiconductor, E-Stop)
  • (CH2) 4~20mA analogue transmitter signal –source
  • (Catalytic, Electrochemical, IR, PID, Semiconductor, E-Stop)
Sensor Inputs image 1

Control Unit PCB

Control Unit PCB image 1

Power Consumption

  • 4 watts – full alarm

Outputs

  • 1, 2, 3 (alarm) and 4 (fault) alarm relays – SPCO normally
  • de-energised – energised latched or unlatched options
  • Relay 3 selectable:-
  • Duplicate Relay 1, 2, 4 or resettable global alarm relay
  • Relay 4 selectable:-
  • Fault or resettable global alarm relay
  • All contacts rated 3A – 230v AC
  • Selectable inhibit active indicator or resettable sounder
  • output – o/c 100mA – 24v DC (Y – Output)
  • 4~20mA signal output, sink/source.
  • CANbus
  • Internal mains power supply 24vDC @1.2A
  • available to user 500mA

Logging

  • Intervals – Variable time
  • Rollover / stop
  • Storage – 2,880 readings

Miscellaneous

  • Passcode entry
  • Operating temperature –15 to +50˚C
  • Storage temperature –5 to +55˚C
  • Alarm relay inhibit during calibration
  • X – Input – external input to 0V
  • Sounder Isolate – mute link
  • System function test
  • Dimensions L 145mm H 145mm

Miscellaneous

  • Passcode entry
  • Operating temperature –15 to +50˚C
  • Storage temperature –5 to +55˚C
  • Alarm relay inhibit during calibration
  • X – Input – external input to 0V
  • Sounder Isolate – mute link
  • System function test
  • Dimensions L 145mm H 145mm
  • D 65mm (S) shallow box
  • D 100mm (D) deep box
  • Weight 0.8 kg
  • Protection IP64, IP66 over housing option
  • Field Terminals – screw type 2.5mm
  • Cable entry – top, bottom, sides, rear Document of Conformity C1943
Miscellaneous image 1