Features and functions, S1 dip switches, Ab c – Chamberlain MADCBB User Manual
Page 13: J2 j, Fast run timer (full speed run timer), Clutch option, Handing the barrier arm, K1 relay (optional)

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FEATURES AND FUNCTIONS »
S1 DIP SWITCHES
AUX LIMITS
1
J2
J
M/S
1
R1
U4
R12
S1
D8
1
2
3
4
5
6
7
8
S2
1
2
3
4
5
6
7
8
D1Ø
R
A
B C D E
FAST RUN TIMER (FULL SPEED RUN TIMER)
DIP Switch S1-1 to S1-4
When the gate operator activates, it ramps up and slows down for a fixed 
amount of time, but will run at full speed for variable amounts of time 
depending upon the settings of the S1-1 to S1-4 DIP switches. 
Each DIP switch represents increments of 1/8 second. 
When DIP switches S1-1, S1-2 and S1-3 are in the ON position, the Fast Run 
Timer is set to 2-3/8 seconds by factory default. 
When DIP switches S1-1 to S1-4 are set in the OFF position, the full speed run 
time is 1-1/2 seconds.
The longer the operator runs at full speed, the less ramp up and slow down 
time. When adjusting, make sure the Fast Run Timer settings DO NOT overrun 
the slow down time.
SINGLE BUTTON FUNCTION (INCLUDING PULSE RADIO RECEIVER 
OPEN/CLOSE)
DIP Switch S1-5
With S1-5 DIP switch in the ON position, the Single Button Function (Command 
to Open/Command to Close) will activate, with inputs on terminal 4 and 
Common (COM) on the J5 terminal strip. Any of the terminals 9-12 on the J5 
terminal strip can be used for common.
When using this feature with the radio receiver (provided), move the radio 
wire from terminal 1 to terminal 4 on the J5 terminal strip. 
CLUTCH OPTION
DIP Switch S1-6
With S1-6 DIP switch in the ON position, and using the Clutch Option; when the 
barrier arm is manually forced UP (OPEN), the barrier arm will automatically 
CLOSE. 
If the Close Loop detects tailgating, the K1 Relay will activate. If an anti-
tailgating alarm is wired into terminal strip (J1), an alarm will sound.
NOTE: When using the Clutch Option, turn DIP switches S1-6 and S2-7 to the 
ON position (Auto Close). When this feature is activated the barrier arm will 
CLOSE by the timer whenever it is forced UP (OPEN).
A
B
C
HANDING THE BARRIER ARM
DIP Switch S1-7
The J4 Motor Wiring is controlled by DIP switch S1-7. The Handing of the 
Barrier Arm may be changed from right-hand to left-hand operation by 
reversing the factory default motor connections. 
NOTE: Right-hand or left-hand operation is determined by facing the 
control board with the barrier arm in the CLOSED position. If the barrier arm 
is to the right, it is set for right-hand gate operation.
1. Disconnect power to the operator.
2. For left-hand operation reverse the motor wires on J4-7 (blue wire) and 
J4-8 (orange wire) (see below).
3. Set DIP switch S1-7 to the ON position.
4. Turn the motor pulley until the barrier 
arm is to the left.
5. Turn the Limit Cam so the Limit Cam is
parallel to the arm and just behind the 
limit sensor. 
6. Connect power to the operator.
K1 RELAY (OPTIONAL)
DIP Switch S1-8
Auxiliary devices such as Counters, Alarms, Buzzers, and SAMS (Sequence 
Access Management System), can be wired into the K1 Relay and terminal 
strip (J1).
When S1-8 DIP switch is in the OFF position, the K1 Relay will activate 
throughout the OPEN cycle.
When S1-8 DIP switch is in the ON position, the K1 Relay will be activated 
briefly until the OPEN LIMIT (OLS) is reached.
E
D
S1 Dip Switch Block
S1 DIP SWITCHES
24VAC XFMR
ACC+
1
D12
R13
D14
U19
J4
F3
ACC–
BAT–
BAT–
MO
BAT+
MOTOR
MOTOR
Blue
Orange
CAM POSITION
(Control Board)
