GDS 202 User Manual (English)

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TECHNICAL

ONTROL

NIT

Power Supply 230/115vAC or 24vDC ± 15%

he two voltages may be used at the same time (standby battery)

ower Output

4vDC-200mA max. - auxiliary equipment

requency

0/60 Hz

Consumption 3 watts

etector Head

tandard l to 10 (Auxiliary power supply - 1 to 20) Toxic and/or

lammable sensors

Indicators Power - (Green LED)

re alarm - (Flashing red alarm LED and intermittent sounder)

non latch

Full alarm - (Constant red alarm LED and sounder) - latching

(

optional non-latch)

Fault - (Amber LED and sounder) Fault monitoring -

sensor/sensor cable/control unit - non latching

ensor Cable

core I mm

able length - 200m max

Alarm Relays Pre alarm S.P.C.O. (R1)

Full alarm D.P.C.O (R2)

Fault alarm S.P.C.O (R3)

Relays are de energised in non-alarm state (option-energised)

All contacts rated - 5A @ 230v AC (none inductive loads only)

Relay Inhibit: Front panel access Ambient Temp

Remote Reset Option Operation: -5 to +45°C

Protection: IP65 Storage: +10 to +60°C

Weight : 920 gms

Dimensions: L 200mm x H l20mm x D 58mm

SENSOR

Power Supply 12 to 30v DC

Consumption 1.2 W

Indicators Power (Green LED)

Gas

Alarm (Green LED to red and sounder) - non latching

F200 Flammable Gas

Alarm Threshold F200 1% CH4 Adjustable - Red ident.

T200 Carbon Monoxide

Alarm ThresholdT200 50ppm

Adjustable -

ellow ident.

R200 Refrigerant Gas

Alarm Threshold R200

Adjustable - Green ident.

Ambient Temperature Operation: -5 to 45°C Storage: +10 to +60°C

Protection IP42

INSTALLATION

Warning: No termination or wire connections should be made while the system is

powered up.

Control Unit: The control unit should be mounted in a position which is accessible

and in the field of vision and not directly above cooking appliances or sinks.

Mains supply should be from a 1A fused unswitched outlet to BS5733. Internal

wires should be routed away from electronic components.

Sensors: The positioning of sensors depends upon the type of gas to be

monitored and its density with respect to air. Heavy gases (LPG, Propane, Butane,

Refrigerant Gases) - Locate at 15 to 20 cm from the floor

. Lighter Gases (Methane,

Natural Gas, Town Gas) - Locate at 5 to 10cm from the ceiling. Carbon Monoxide -

Locate at 1.5 to 2 metres from the floor. All equipment should be mounted away

from direct heat, Sensors should not be located outside or where temperatures are

outside the operational specification.

For further information see website - www.gds-technologies.co.uk

SETTING UP

Having terminated all cables the following link adjustments should be made:

A. Controller - signal in selection

Remove the link from the selected sensor sig input Z1, Z2, Z3, Z4

B. Sensor end of line link

End of line link (EOL) should be removed from all but the end sensor board,

(each sensor line used).

OPERATION

On power up, the green power indicator will flash for 3 minutes, indicating that the

ensors are stabilising, during this timed period all alarm functions are held in the off

ondition.

fter the stabilisation period, any sensor detecting gas will provide a local visual (red

ED) and audible alarm, at the same time transmitting a signal to the control unit

where a pre alarm is indicated by an intermittent audible alarm and the red alarm

ED flashing with the pre alarm relay changing state. Should the gas surrounding the

sensor clear within 45 seconds the system will return to the normal operating

condition. However, if the gas remains for longer than 45 seconds, full alarm

ondition will occur and be indicated by the red alarm LED and sounder going

constant as well as the full alarm relay activating.

he audible alarm may be silenced at any time but full alarm indication will be

latched until the gas has cleared after which the system may be reset by pressing

the reset pad.

TESTING

The system may be electrically tested by pressing the test pad located on the

control unit for 15 seconds, after which the pre-alarm state will be initiated (with the

exception of relay

. By maintaining pressure on the test pad for a further 15

seconds a full alarm condition will result (including the operation of both alarm

relays).

Each sensor has an individual test switch which when pressed simulates gas

present and turns the green LED to red and switches the sounder on.

To ensure that the system responds correctly to the presence of gas, each sensor

should be exposed to test gas. It is advisable to carry out this test at least every

six months.

During test periods alarm relays may be inhibited by pressing the reset pad for 15

seconds after which the fault indicator will illuminate and maintain all relays in the

normal non-alarm state, pressing the reset pad again for 15 seconds will remove

the inhibit.

Optional normally energised relays

Relays may be individually set to be normally energised or de-energised. Press

and hold the test button, within 2 seconds press and hold the reset button, after 15

seconds all alarm L.E.D’s will turn on, release both buttons immediately.

Relay Set-up status

Red zone alarm L.E.D. FLASHING - Normally de-energised

Red zone alarm L.E.D. ON CONSTANT - Normally energised

Z1 indicator - pre-alarm relay

Z2 indicator - Full alarm relay

Z3 indicator - Faulty alarm relay

The zone 1 L.E.D. will now be ON. Press the test button for selection of either

energised or de-energised - see relay status above.

When selection is made press the reset button, Z2 full alarm relay selection may

now be carried out repeat for Z3. Having pressed the reset button on completion of

the fault alarm relay setting the unit will be in normal operating mode.

FSig

+s--s+ +s--s+ +s--s+ +s--s+

Flam R Flam Toxic

DS 202

F FF

T T T T T T T

wire

3 wire

+s--s

NOUT

Sounder

emove EOL

link from all

ut last sensors

Alarm LED

Sensor

Sensitivity adjustmentTest Switch

Terminals

pare

Sig

+s--s+ +s--s+ +s--s+ +s--s+

Flam R Flam Toxic

GDS 202

F FF

T T T T T T T

3 wire

+s--s

NOUT

Sounder

emove EOL

link from all

ut last sensors

Alarm LED

ensor

Sensitivity adjustmentTest Switch

Terminals

pare

123

E 123412341234L

Mains

ZONE-SIG

NC C NO

PRE-AL

RL2

FULL-ALARM

RL3

FAULT

NC C NO NC C NO NC C NO

volts

4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

SENSOR SENSOR

Terminals

FSig

s--s+

Flam R Flam Toxic

GDS 202

F FF

T T T T T T T

3 wire

+s--s

INOUT

Sounder

Remove EOL

link from all

but last sensors

larm LED

Sensor

Sensitivity adjustmentTest Switch

Terminals

Spare

123

E 123412341234L

Mains

ONE-SIG

NC C NO

PRE-AL

RL2

FULL-ALARM

RL3

FAULT

NC C NO NC C NO NC C NO

volts

4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

SENSOR SENSOR

ransformer

ounder

Auto

eset

emote Reset

one Signal Selectors

Alarm

Relays

ute

emote

Inhibit

emote

ounder

ield

Terminals

RL1

RL2

RL3

FSig

+s--s+ +s--s+ +s--s+ +s--s+

Flam R Flam Toxic

GDS 202

F FF

T T T T T T T

3 wire

+s--s

INOUT

Sounder

Remove EOL

link from all

but last sensors

larm LED

ensor

Sensitivity adjustmentTest Switch

Terminals

Spare

E 123412341234L

Mains

ZONE-SIG

NC C NO

PRE-AL

RL2

FULL-ALARM

RL3

FAULT

NC C NO NC C NO NC C NO

volts

5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

SENSOR SENSOR

Transformer

ounder

Auto

eset

emote Reset

one Signal Selectors

larm

Relays

ute

emote

Inhibit

Remote

ounder

ield

erminals

RL1

RL2

RL3

GDS Technologies Ltd Fusion Point, Ash Lane, Garforth, Leeds UK LS25 2GA

Tel +44 (0)113 286 0166 Fax +44 (0)113 287 8178 Email sales@gds-technologies.co.uk www.gds-technologies.co.uk

GDS 202 GAS ALARM

This document is non contractual and the equipment specification and detail may be modified at any time without prior notice.

Brand	GDS
Model	202
Category	Security System
Language	English

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