1 – 4 channel direct mV Bridge input & 4-20 mA input Control Panel
Description: 1-4 channel controller with display. Wall mounted IP54 control unit with lockable door complete with common low, high and fault DPCO relays rated 5 A at 240 V AC. Each channel 1 relay low and high alarm selectable SPCO and 4-20mA analogue outputs. 110V or 230V ac operation
Versatile System Configuration
Flammable, Oxygen, Refrigerant and Toxic Gases
1 to 4 sensors (mV signal or 4~20 mA inputs)
Plug in sensor channels
Two alarm stages
Selectable alarm relays per channel
Analogue 4-20mA output per channel
Delay to alarm – option
Description
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
1 ~ 4
Measurements
Combustible Gas – L.E.L., % vol, ppm
Toxic Gas – ppm, % vol
Oxygen – % vol Depletion/Enrichment
Any 4~20mA input signal
Power supply
230/115v AC or 24v DC
Power Consumption
12 watts – full alarm
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
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