Photocells (Optional) Model; Radio And Radio Programming; Program / Delete Remote Controls; Diagnosis On The Control Board - Chamberlain CB124 Instructions Manual

PHOTOCELLS (OPTIONAL) MODEL: 771E
The photocells are for safeguarding the gate and must be used. The fitting location
depends on the gate's design. EN12453 specifies that a pair of photocells must be installed
at a height of 200 mm and activated to "Close". The photocells consist of a transmitter and
a receiver and must be opposite each other. The photocell is mounted on the wall using
small screws and wall plugs. To enable the "Automatic Closing" function, the Chamberlain
failsafe photocell must be installed. The Chamberlain failsafe system (2-cable system) has
small LEDs (light) that can be seen from the outside on both sides to indicate the status of
the photocell.
Programming of IR sensors:
- connect IR sensors
- program the travel of the gate.
Deletion of IR sensors:
Disconnecting already connected IR sensors will cause the control board to block the
functionality of the terminals it was connected to. To delete IR sensors correctly:
- disconnect IR sensors
- cut control board from current shortly
- program the travel of the gate.
Diagnosis of the photocell
LED constant = OK
LED flashes = photocell disables control board
LED off = no current, incorrect connection or polarity

Diagnosis on the control board

LED off = OK no photocell connected
LED flashes = photocell disables control board
Connection between 1 & COM:
Active when gate is closing
(reverses gate to open)
Connection between 2 & COM:
Active when gate is closing and opening
Connection between 3 & COM:
Active when gate is opening
(holds gate in present position until photocell is cleared;
continues when cleared)

RADIO AND RADIO PROGRAMMING

Insert radio module on designated pins, if not pre-installed.
Number of remote controls possible to memorize: 180
Notice: Do not program other remote controls than allowed.
Other brands or types may seem to work but cause functional
issues

PROGRAM / DELETE REMOTE CONTROLS

The receiver has two channels CH1 and CH2. Using the different
channels enables the opening of one wing resp. both wings. For
example, if CH2=P2 receives the code from the remote control only
one wing will open. Choosing a different button on the remote
control in combination with CH1=P1 will cause both wings to open.
PROGRAMMING
- Insert (connect) jumper "RADIO"
- In order to store a code press a previously selected button on the
remote control while simultaneously pressing the learn-buttons P1
or P2 of the logic board.
- When pushing the programming button P1 or P2 an LED will be lit
up and goes OFF once the programming was accepted.
- Repeat for all remote controls (a maximum of 180 remote controls
can be programmed to each channel).
Note: Make sure not to program the same remote control button to
CH1 and CH2, otherwise the gate will work improperly.
Redo programming if required.
- To finish: Remove (disconnect) jumper "Radio"!
DELETE
- Insert (connect) Jumper "Radio".
- Press and hold learn-buttons (P1 or P2) for approx. 10 seconds
until LED goes out again. All codes programmed to this channel
are deleted.
- Remove (disconnect) jumper "Radio"
COM COM
PHOTO
3 2 1
+ + +
STOP
EDGE
PED
PHO 3
LEARN
CH1
DGN
CH2
COM
PHOTO
PED STOP
T
3 2
COM
ACT
EDGE
8.2KΩ
8.2 Ω
+ +
+ +
+ +
COM EDGE
1 8.2KΩ
+