Chamberlain LiftMaster Professional SL540 Manual page 23

P R O G R A M S E T T I N G S ( D I P S W I T C H # 2 ) c o n t ' d
EDGE/PHOTO OPEN
This switch (S2-3) selects edge or photo sensor for the gate
opening protection input.
Open Photo Eye (Pause): When the controller is configured for
photo eyes, the input functions to pause the gate during the
opening cycle. Once the input is cleared the gate continues to
open.
Open Edge: When the controller is configured for safety edges,
the input functions to reverse the gate to the close limit when the
edge is activated during the opening cycle.
EDGE OPEN
S2
ON
ON
1 2 3 4
P R O G R A M S E T T I N G S ( D I P S W I T C H # 4 )
DUAL GATE COMMUNICATIONS
The controller is capable of running the operator in a master or
second mode depending on (S4) switch setting.
Before initiating any command the master unit queries for the
presence of a "second unit" for a time period of one second. If
the master gets no response the operator will operate in a stand
alone mode. NOTE: For single unit applications, a jumper must be
placed between 11 and 12 of the field wiring terminal block. In
this mode no further communications will take place during
travel. If the master detects the presence of a second unit the
master will continue to query the second unit during travel. The
second unit will send a response to the master for every query.
The second operator will stop if there is a period of one second
or more of no communications.
When two operators are connected in dual gate configuration
accessories may be connected to either the master or second.
NOTES:
• Do not run Master/Second communication wiring in the
same conduit as the power and control wiring.
• The Second unit will require a normally close stop circuit for
proper system operation.
• After Master/Second wiring has been completed and the S4
switch programmed, both units must have their power
cycled to initiate proper Master/Second communication.
• The motor learn function must be completed in stand alone
mode prior to Master/Second wiring.
PHOTO OPEN
S2
ON
ON
1 2 3 4
EDGE/PHOTO CLOSE
This switch (S2-4) selects edge or photo sensor for the gate
closing protection input.
Close Photo Eye (Reverse): When the controller is configured for
photo eyes, the input functions to reverse the gate to the open
limit when activated during the close cycle.
NOTE: Timer to close will reset if enabled.
Close Edge: When the controller is configured for safety edges,
the input functions to reverse the gate to the open limit when
activated during the close cycle. The entrapment is not cleared at
the limit and the timer to close will be disabled. The timer to
close may be enabled by activating the interrupt loop, soft open
or hard open input.
EDGE CLOSE
S2
ON
ON
1 2 3
MASTER OR STAND ALONE
GATE SETTING
MASTER
UNIT
ON
S4
SECOND
UNIT
Figure 1
TERMINAL BLOCK
12 11
Street
Second
23
PHOTO CLOSE
S2
ON
ON
4 1 2 3
SECOND GATE
SETTING
MASTER
UNIT
ON
S4
SECOND
UNIT
TERMINAL BLOCK
11 12
SHIELDED CABLE
(TWISTED PAIR)
MINIMUM 18 GAUGE
CONDUIT
Master
(Gate Conduit)
See Figure 1
Complex
6'
or
Parking Lot
4