Connection.of.relay.photocells.and.safety.devices.with."N.c.".Contact; Connection.of.bus.photocells - FAAC 624 BLD Mode D'emploi

4.2.CONNECTION.OF.RELAY.PHOTOCELLS.AND.SAFETY.DEVICES.WITH."N.C.".CONTACT

The 64 BLD board envisages the connection of closing.safety.devices which are tripped only during the barrier closing
movement, and are therefore suitable for protecting the closing zone against the risk of impact.
If.two.or.more.safety.devices.(NC.contacts).have.to.be.connected,.put.them.in.series.with.each.other.as.
. .
shown.in.figures.3,.4,.5.under.the.heading."SAFE".
Connection of 1 pair of closure photocells
Connection of 1 pair of closure photocells
with FAIL SAFE facility
To be set in the nd programming level

4.3.CONNECTION.OF.BUS.PHOTOCELLS

Photocells using BUS technology are connected to the 64 BLD control unit ALL IN PARALLEL as shown in Fig. 7 through
single power/communication line.
.The BUS photocells do not have connection polarity.
Up to a maximum of 8 pairs of BUS photocells can be connected to the board.
The photocells are subdivided by quantity into the following groups:
Pairs of closure photocells:
Pairs of photocells for OPEN pulse:
Make sure that at the nd
programming level
:
o4 00 P4 no
= =
and
Fig. 3
Fig. 4
FS Y o 1 00
= =
: and
max 7
max 
1st Pair of photocells
5
Connection of 2 pairs of closure photocells
Connection of no safety device
1 2 3 4 5 6 7 8 9
J1
2nd Pair of photocells
Fig. 5
10 11 12 13 14 15 16 17 18 19
Fig. 6
Fig. 7