G27C
IS G27C 0711.doc
4
GB
FEATURES
- Control unit for different type of detectors.
- Manual or Automatic reset of Alarm.
- Push button alarm test.
- Adjustable alarm levels.
- DIN-rail mounted.
FUNCTION
At start up, the LED ”ON” will be lit and a process to activate the
detector will start in the control unit.
When the LED "
Active
" is lit the system is ready to detect a gas
leakage. Gas leakage will first give a warning, this is indicated
by an illuminated red LED
”Warning”
and the relay output will
close. If gas concentration increases the Warning will go to
"Alarm"
status. This means that LED Alarm will be constantly
lit and the alarm relay will close. Automatic or manual reset can
be selected by a jumper.
Manual reset:
Reset of relays and LEDs by pushbutton
”Reset”.
Automatic reset:
Reset of relays and LEDs will be automatic
when the gas disappears.
"Fault Alarm"
will light when there is a break or a short-circuit
in the cable or in the detector itself.
INSTALLATION
Din rail mounted control unit.
Connection according to wiring diagram.
The circuit diagram to the left shows Alarm relays in position
power off.
NOTE
! The fault Alarm relay is normally energised (closed) and
switches off if there is a power failure in the system.
When the GD/GS/GR2.0- detector is used no calibration is
required. When using GJ-EX or any other detector, please
advice details when ordering.
ANNUAL FUNCTION CONTROL
Testing the system is recommended to be done at least twice a
year. A basic function test can be made using a service tool
(SA100) and a voltage meter.
Extended control and calibration also requires test gas with a
specific concentration.
Contact us for more information.
TECHNICAL DATA
Power supply:
12 V AC/DC 7 W
Sensor cable:
4 (3)x 0.75 mm
2
max. 50 m
(screened)
4 (3)x 1.5 mm
2
max 150 m
LED indicators:
Alarm, Warning, Fault alarm, Active
and
(Power
On)
Outputs:
Alarm 24V AC/DC 1A
Warning 24V AC/DC 1A
Fault alarm 24 V AC/DC 1 A
Ambient temp.
0
0
C - 50
0
C
Housing: IP
30
Dimensions: 79x118x58mm.
Suitable for 35mm DIN rail
This product is in conformity with
the EMC-directive 89/336/EEC.
It fulfils the requirements of:
SS-EN 50 081-1, ed. 1 1992
SS-EN 50 082-2, ed. 1 1995
Specifications subject to change.
11
10
9
8
7
6
5
4
3
2
1
(-)
(+)
(M)
{
{
{
}
Auto
}
Manual
Test
terminal
Warning
Alarm
Warning level
Alarm level
} GD/GS/GR-2.0 detector
} GJ-EX/others
Type of detector
Choice of reset-function is
made by a jumper
GV-Pot
A
W
Fault
Alarm
Alarm
Warning
Detector
Circuit diagram
Supply
12 V AC or DC
