Only one monitored photocell can be connected to the
Closing or Opening safety inputs. More than one photocell
or other device can be connected to the safety inputs, but
they will not be monitored.
Other devices connected to the safety inputs must have
normally closed contacts and wired in series with the main
monitored sensor.
See the following example of one closing safety monitored
photocell and one non monitored one.
Closing Safety Devices
Opening Safety
Devices
Opening/Closing
Safety Devices
Opening/Closing Safety Devices:
They operate during the gate opening and closing move-
ments and are suitable to protect the opening and closing
areas against the risk of impact. Typically these photocells
work in combination with other monitored photocell pro-
tecting closing or opening entrapment zones. In that case
they can’t be monitored so they can only protect against
potential impact on vehicles.
CLOSE SAFETY MONITORED
CL OP
FSW
OPEN / CLOSE SAFETY NOT MONITORED
RX
TX
RX
TX
OPEN SAFETY MONITORED
RX
TX
Connection of Two Pairs of Closing Photocells, One
Monitored and One non Monitored
Fig. A8
Connection of One Pair of Closing Photocells
(monitored), One Pair of Opening Photocells
(monitored) and One pair of Opening/Closing
Photocells (non monitored)
Fig. A10
Fig. A9
CLOSE SAFETY NOT MONITORED
CL OP
FSW
CLOSE SAFETY MONITORED
RX
TX
RX
TX
RX= Receiver Photocell
TX= Transmitter Ptotocell
RX= Receiver Photocell
TX= Transmitter Ptotocell
16” or less
DS1
DS1
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