Chamberlain LiftMaster BARS1 Mode D'emploi page 69

• SERIAL COMMUNICATION
o Inactive for these barrier models
• LOOP – output to loop
o Only if socket VEHICLE DETECTOR SOCKET is occupied
o The functionis identical to output: Vehicle Detector Signal
• PHOTO SIGNAL INPUT
Terminal for Photocell input N/O contact (closer)
2 modes of operation possible:
Adjustment via DIP switch 3
DIP switch 3 OFF:
Photocell keeps barrier from closing. If automatic closing is activated (preset time), this time runs
in the background (= is not reset to beginning). After release of photocell the barrier closes
immediately.
Note 1: Install Photocells in height of vehicle body (sheeting height), not in height of wheels
(600-800mm)
Note 2: Photocells are installed after barrier has been mounted – as a second safety device
Note 3: A unit where automatic closing is activated should not be secured solely by means of
photocells. A loop is more suitable. Especially bear this in mind with fast closing barriers
(1&3 seconds)
DIP switch 3 ON:
Photocell opens. As soon as Photocell is interrupted the barrier opens. If automatic closing is
activated (preset time) this time runs in the background (0 is not reset). After time has elapsed
the barrier closes, no matter if the Photocell is still active. This mode of operation is only suitable
to let a single vehicle exit.
Note: the automatic closing time is reset when, while the barrier is open, another command is
given for the barrier to OPEN, which is applied for at least 1 second.
• UP LIMIT OUTPUT: terminal for signal forwarding barrier OPEN to peripheral equipment or
controls
o Voltage-free output. Not suitable for 230Volt or load operation
o COM: joint contact
o N/O: Normally open – closer
o N/C: Normally closed - opener
• SIGNAL INPUT: input for switch
o All terminals N/O (closer)
o COM: joint connection
o UP: input barrier open
o DOWN: input barrier close
o STOP: input stop-switch
Note: if there is a continuous signal applied at the UP contact the barrier remains open. If a closing
time has been preset the timer will start countdown after contact has been released.
• VEHICLE DETECTOR SOCKET: plug-in socket for loop diagnosis with universal socket
o The socket in question is a universal socket which can be used with standard loop diagnosis
units. The loop itself is connected via the outputs: LOOP.
Note1: Prior to installation ensure that the applied detector fits into the control box (overall height),
otherwise a different model must be fitted externally
Note 2: Prior to usage of diagnosis unit check compatibility. See Terminal occupancy of socket.
A list of reference with compatible diagnosis units may be obtained through the customer service
department (August 2008 in preparation)
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Notes