GDS 102 User manual

Technical Sheet
ref C1943Av1
377D2C
GDS 102
DUAL SENSOR GAS ALARM
A dual sensor unit supporting separate analogue 4~20mA and millivolt signal inputs,
sensor operation is continuous with alternating displayed gas readings at five second
intervals. Function selection and adjustment is accessible via the front membrane panel
or laptop connection to J11 USB port.
Installation
CONTROL UNIT: The control unit should be mounted in a position which is accessible and in the field of vision. Mains should be from a fused supply.
SENSORS: The positioning of sensors depends upon the type of gas to be monitored and its density with respect to air. See G973
Heavy Gases (Propane, Butane) – locate at 15 to 20 cm from floor level.
Lighter Gases (Methane, Natural Gas, Ammonia, Hydrogen) – locate at 5 to 10cm from the ceiling.
Carbon Monoxide Locate at 1.5 metres above floor level.
All equipment should be mounted away from direct heat and in accordance with its IP rating.
REFERENCE DOCUMENTS:
C1144 Equipment Installation Guidelines
C1770 Wiring & Terminations for Sensors and Panels
G973 Gas Sensor Locations
C1548 Aspirated Sensor
On power up the unit will be inhibited for a 120 second warm up period displayed as a countdown on the display (this may be overidden by
pressing 1), a two sensor unit display readout will alternate at 5 second intervals, each reading may be held or released by pressing 1. To access the
main menu press 2 followed by the entry code 231, pressing 1 or 3 will allow travel through the menu and adjustment of settings, pressing 2 enables
access into the selected menu field and on completion pressing 2 will confirm your selection.
Main Menu
Exit
2CH1 set up (sub menu) press 2 for access
3CH2 set up (sub menu) press 2 for access
4Delay to alarm. 0~255s
Default setting – 0 seconds
5Latched/unlatched alarms (relay 1&2 cannot be reset when in alarm)
Default setting – latched
6Exit
7Normally energised/de-energised relays.
Default settings – de-energised
8LED/relay test
9Factory default settings – restore
10 Exit
11 Set 4 and 20mA output – calibrate
12 Relay 3 operating mode options – duplicate relay 1, 2, 4 or resettable
global alarm relay, channel 1/2 relay 1, 2, 3
13 Relay 4 operating mode options – fault or resettable global alarm relay,
channel 1/2 relay 1, 2, 3
14 Relay off delay. 0~255s
Default setting – 0 seconds
15 Exit
16 X input – external input to 0v, select text.
Default setting – flow fail
17 Select 4~20mA signal output to follow CH1/CH2 or highest reading.
Default setting – highest
18 Select open collector output – Inhibit indicator or resettable global switch.
Default setting – inhibit
19 User backup (settings)
20 Exit
20 Screen colour – Green/Blue
Sub Menu
Exit
2Enable/disable channel
3Chanel inhibit – auto timeout – 60 minutes
4Zerospan the channel
5CANbus channel address set (Combi)
6Gas range select
7Exit
8Gas type selection
9Alarm level set (A₁, A₂, A₃)
10 Display gas reading, decimal point setting
11 Dead band setting – off, display only, full signal.
Default setting – off
12 CH2 input only (select mA fault trip level)
Default setting – 2.5 mA
The 102 may have been supplied without configured sensors (no
sensors enabled), in this case the following adjustments should be
carried out.
Channel 1 mV signal sensor (main menu 2)
Sensor supply may be measured between the two sensor voltage
test pins SV and TP10, adjust as required using the sensor supply
adjustment potentiometer SV, see sensor cell supply table.
The initial sensor zero adjustment is achieved by turning the zero
potentiometer RV4 until D9 zero LED just turns green. Test gas
should be applied to the sensor and a coarse adjustment made
using the gain calibration potentiometer RV3.
Channel 2 4~20mA signal sensor (main menu 3)
See sensor transmitters Tox/O2C1882 Flam C1883
Ensure the sensor is in clean air, measure across test pins TP1/TP2
for a reading of 4mV = 4mA.
From this point on all further /future fine adjustments and settings
may be made through the menus.

Technical Sheet
ref C1943Av1
377D2C
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)
Supply
Volts
Internal
Sensor
Remote
Sensor
Aspirated
Sensor
24vDC CH1 + CH2 CH1 + CH2 CH1
(+ CH2 remote)
Mains CH1 CH1 + CH2 –
Mains double box CH1 + CH2 CH1 + CH2 CH1or CH2
(+ CH remote)
Mains Version
100~240v AC 50/60 Hz
DC Version 24v nominal 18-30v DC
Power 4w
Outputs – see menu options
Alarms 1, 2, 3, Fault relays – S.P.C.O.
Relay contacts rated 3A/230v AC
CANbus – see Combi alarm system
4~20mA analogue output sink/source
Internal mains power supply 24vDC @1.2A,
500mA available to end user
Y output 100mA o/c, resettable
Logging
Intervals – Variable time,
Rollover / stop
Storage – 2,880 readings
Access – laptop USB (J11) GDS website terminal download
Display Indication
Power Green/Blue
Alarms 1, 2, 3 Red
Fault Amber
Display 2 line alphanumeric
Audible Alarm
Gas/Fault mutable: 85dB@10cm
Environmental
Operating temperature: -15 to +50°C
Storage temperature: -5 to +55°C
Humidity: 5–95% RH non condensing
Protection: IP64, IP66 over housing option
Sensor Cable
3 core standard, 2 core option for electrochemical transmitters
1mm2screened –500m
SPECIFICATION
Options
J3 CANbus – EOL – see Combi
J13/15 For Semiconductor sensors
J9/10 Sink/Source 4~20mA output
J1/2 Gain – factory set
J18 Sounder mute jumper
J19 HyperTerminal setup 4800 baud
J29 Address change enable – see Combi
3 wire
GDS 102
CH2
CH2
D/A Direct Addressable
Sensor
+24
0v
4~20mA
+s
Y PW
–
2/3 wire
GDS 102 D – Direct Sensor
+24
0v
4~20mA
+s
Y PW
–
CH1
3 wire
GDS 102 MV Sensor
W
Y
P
Y PW
This document is not contractual and the specification / detail may be modified at any time without prior notice.
E: sales@gds–technologies.co.uk T: [phone]
GDS TECHNOLOGIES LTD |FUSION POINT |ASH LANE |GARFORTH |LEEDS |LS25 2GA |UK www.gds–technologies.co.uk
USB
CONTRAST
1 2 43
PCN 377
GAIN GAIN
SPARE
J20
J11
VR1
J31
J19
RV3 RV4
J12
BU1
J10 J9
D9
S0S1
K4 K1 K2 K3
J14 J30
TP15
TP13
J29
J15
TP1 TP2
MUTE 4-20mA
IN
4-20mA
OUT
ZERO
Sounder
EOL
TEST ADD
J34 J33 J32 J35
+ Sig Y
4-20mA IN 4-20mA OUT AL1mV INPUT
P NO N/CC
AL2
NO N/CC
AL3 Fault
NO N/CC NO N/CCW– + –
INPUT
X
INH
Y-OUT
0V
0V 4-20
24V
OUTPUT
24V
IN IN
OUTCAN
Hi Lo
ZERO SV
SV
1
UP
2
SEL
3
DOWN
SENSOR (Low) (High) (O-Range)CH-2 CH-1
J13
TP10
J1
J3
J18
J2
V0
Sensor Cell Supply Table
CAT300A 2v/300mA
CAT165 2.5v/175mA
F6–170 2.5v/175mA
SEM–1 5v/170mA
SEM–2 4v/170mA
PID 6.5v
GDS PRIME 4v/70mA
CAT100 2v/100mA