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4.C
REMOTE SIGNALS (OPTIONAL)
The electronic control board can be improved adding the following optional features:
Ventilation status (ON/OFF)
It is possible to obtain a 12 Vdc output to connect a led light or alternatively a Normally Open voltage free
contact to be connected to an external circuit.
There are two different working possibilities:
1
the signal starts when ventilation is turned ON and stops when ventilation is OFF.
2
the signal is flashing during the start up phase of the ventilation and is ON when the correct air flow
conditions are reached.
Correct air flow conditions
It is possible to obtain a 12 Vdc output to connect a led light or alternatively a Normally Open voltage free
contact to be connected to an external circuit. That signal is closed when air flow rate is in the correct range
and it is open in case of any flow alarm.
External consent
On request it is possible to allow ventilation to be turned ON by a remote volt free contact. When the
ventilation is turned ON the cabinet stay in stand by (start up) till the remote normally open contact is closed.
If during normal ventilation the remote contact is open the following message will appear "REMOTE
CONTACT OFF" and the operator has to switch OFF ventilation as soon as possible and then check the
reasons of the failure.
00055EN Rev.10 – 12/2011
9
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