Chamberlain LIFTMASTER SL920 - Manual (Page 28)

28
NOTE:
z All open and safety devices must have
normally open contacts.
z For Devices requiring power, refer to
the specific diagram for that particular
device.
Notes
Other Commonly Used Open and Safety Devices
 Be sure to read this entire manual before attempting to
perform any type of installation or service to the gate opener.
 Once the installation has been completed, this installa-
tion and service manual becomes the property of the home
owner or end user and should be given to the new owner at that
time.
 For a personal copy of this manual, please contact a
LiftMaster.