3 - ELECTRICAL CONNECTIONS
WARNING:
efore connecting to the mains power, ensure the voltage is correct.
b
Carefully follow the instructions and the connections according to Regulations in force, keeping in mind that
the signal cables should be laid separate from the power cables
.
Otherwise, make sure to use a shielded cable.
An automatic cut-off switch (appropriately identified as device sectioning of the detector) should be
incorporated in the electrical system, adequately located and easily accessible.
Deleting or disabling the probes
monitored gas type selection
Power terminal block
Signal terminal block
S1
S2
S3
1 2 3 4
2)
Operating mode of the main alarm relay.
4)
Selection for oxygen detection
3)
Selection of MEMORY.
1)
Selection of intrinsic safety
N.B.
you can remove the selection of memory
when the gas CO is selected.
S3)
switch group reserved to the probe N° 3
Legend setting switches
S1)
switch group reserved to the probe N° 1
S2)
switch group reserved to the probe N° 2
Diagram of the terminal block relay
PLEASE NOTE!
All relays are free of voltage
Power supply
230 VAC
PH
N
4
5
6
7
8
9
10 11 12
C NC
NO
C NC
NO
C NC
NO
C NC
NO
Fault
1st
threshold
2nd
threshold
Main Alarm
Connection of probes and eventual battery
12 V
+
+
Optional
3 2 1
Probe 1
3 2 1
Probe 2
3 2 1
Probe 3
1
2
3
4
5
6
7
R1
R2
R3
Manual Alarm
Switch 1
Intrinsic safety selection
Switch 2
Main alarm relay functioning mode
Switch 3
Maintaining of the memory of alarm,
only when you set the CO gas
Switch 4
Selecting OXYGEN mode
When the switch is opened, the control unit
activates the audible and visual alarm signal
(buzzer and LED), the general alarm and 2nd
threshold relays switch. When the switch is
closed the alarm stops. Press the RESET button
to restore normal operation.
5
external
push-button (N.C.)
terminal block
