GDS 404 – 1-4 Channel Gas Alarm
Application
The GDS 404 has been designed with features that provide an effective response to the detection of gas hazards in a wide range of environments, from commercial premises through to heavy industrial applications requiring hazardous area sensing.
Typical monitor locations are public buildings, boiler plant rooms, swimming pools, water treatment works, H&V control systems, manufacturing and processing plants.
Technical Data
Sensor points |
|
Measurements |
- Combustible Gas – L.E.L., % vol, ppm
- Toxic Gas – ppm, % vol
- Oxygen – % vol Depletion/Enrichment
- Any 4~20mA input signal
|
Power supply |
|
Power Consumption |
|
Indicators |
- Power – Green L.E.D.
- Mains Fail – power indicator change green to amber
- Alarms – Red L.E.D.s
- Fault – Amber L.E.D.s
- Digital Display – 3 1/2 Digit – gas readout
- Sensor channel selection indicator – Amber L.E.D.
- System test – Alarm L.E.D.s flashing
- Alarm Relay Inhibit – Fault L.E.D. on
|
Outputs |
- High Alarm Relay – Common D.P.C.O
- Normally energised or de-energissed, latched or unlatched
- Low Alarm Relay – common D.P.C.O
- Normally energised or de-energised, latched or unlatched
- Fault Alarm Relay – Common S.P.C.O
- Normally energised or de-energised
- Channel Relays – 1 per channel high or low selectable S.P.C.O
- Normally energised or de-energised, latched or unlatched
- General Alarm Relay – resetable S.P.C.O
- All contracts rated 5A-230vAC
- Analogue 4~20mA output per channel
- Output 24vDC @ 100mA max – auxiliary equipment (non inductive)
|
Audible Alarm |
- Permanent mute option
- Lo, Hi, Fault alarms
|
Alarm Settings |
- Digital Setting (fully adjustable between zero and fullscale)
- Delay to alarm T1 – 10 seconds, T2 – 30 seconds, T1 + T2 – 10 minutes
|
Sensor inputs |
- Bridge type 3 wire mV input
- 4~20mA (electrochemical/infrared)
|
Sensor cable |
- 3 core 1.5mm2 screened <1.5km
|
Miscellaneous |
- EMC approvals EN50270 Marine EN60945
- Enclosure – cable entry – bottom/rear
- Operating temperature -10 to +50?C
- Relative Humidity 0 – 90%
- Protection IP52 – option IP65
- Dimensions 310W x 265H x 75Dmm
- Weight 3.6kg
- Optional battery backup
- Field terminals – 2.5mm quick release
- System/lamp test
- Remote Accept/Reset
- Alarm isolate during service – inhibit
|
Sensors

Fixed Terminals

Click to download Product Brochure
ENQUIRE NOW!