EsiWelma s.r.l.
rev. 01 of 01-09-10 / pg.
4
___________________________________________________________________________________________
Wiring diagrams:
Example a):
- Command of a solenoid valve (Normally Open); in this mode, when the alarm threshold is ex-
ceeded, the solenoid valve will close and therefore the gas supply will be cut-off.
Example b):
- Command of a solenoid valve (Normally Closed); in this mode the solenoid valve will close and
therefore the gas supply will be cut-off when: the alarm threshold is exceeded, if there is a
power failure and if the actual solenoid valve is disconnected.
Example c): -
Command of a solenoid valve (Normally Closed) and of visual and audible alarms from several
locations. The contacts must be connected in series.
Example d):
- Command of a solenoid valve (Normally Open) from several locations.
The outputs (up to 9) must be connected in parallel, respecting the polarities.
___________________________________________________________________________________________
___________________________________________________________________________________________
Connection
diagrams
Installation
data
To be filled in by Installer
Installer's stamp
Installation site
Product order number
Part number
Installation date
230Vac or 12Vac/dc or 12…24Vac/dc
L+
N -
a)
ESN.0.G./.P.
4
3 5
7 6
NO
230Vac or 12Vac/dc or 12…24Vac/dc
L+
N -
b)
ESN.0.G./.P.
4
NC
7 6
3 5
230Vac or 12Vac/dc or 12…24Vac/dc
L+
N -
c)
ESN.F.0./.P.
4
NC
L+
N -
ESN.0.G./.P.
4
3 5
3 5
7 6
7 6
Max 9 detectors in parallel
230Vac or 12Vac/dc or 12…24Vac/dc
L+
N -
d)
ESN.0.G./.P.
4
L+
N -
ESN.0.G./.P.
4
3 5
3 5
7 6
7 6
NO
