Duomo GS920 Manual - Página 4

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Connections and Wiring Diagram

With Positive Safety
switch o
Power Supply
Ph
230V
3A Max. Fused
N
and Isolated
Supply
With pulsed output
switched on
Power Supply
Ph
230V
3A Max. Fused
N
and Isolated
Supply
Layout
Antiseismic
GS920
METANO
METHANE
1. Test Button - Only to be used in testing in laboratory by
qualified technician.
2. Catalytic Sensor - Sensor for Methane or LPG detection
3. Power On - Intermittent when system in test mode.
Static when fully operational.
4. Fault - Illuminates when sensor is not functioning
correctly and should be replaced. After 6 years this will
flash continuosly and beep every hour.
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NC
12V DC
NO
C
1
2
3
4
5
6
7
8
230V Solenoid
valve NC
(normally closed)
NC
12V DC
NO
C
1
2
3
4
5
6
7
8
12V DC Solenoid
valve NO (normally
closed) 600mA
max.
ON
FAULT
ALARM
RESET
With Positive Safety
switch on
Power Supply
Ph
230V
3A Max. Fused
N
and Isolated
Supply
Typical 12V DC
connection
1
2
5. Alarm - Will illuminate when Methane or LPG
concentration exceeds 10% LEL
6. Reset - Reset the GS920
7. Micro switches - Switch 1 turns Positive Safety option
ON or OFF. Switch 2 changes the unit between pulsed
(ON) and continuous (OFF) functioning mode.
8. Terminal connections - See wiring diagram above
4
12V DC
NO
1
2
3
4
5
6
Intrinsic safety 230V
Solenoid valve NC
(normally closed)
NO
1
2
3
4
5
6
12V DC Solenoid
valve NC (normally
12V DC
closed) 600mA
max.
3
4
5
6
7
ON
1 2
8
NC
C
7
8
NC
C
7
8