Chamberlain BG790 - Manual (Page 5)

General Product Information
5
Doc 01-G0674
Rev E
OPERATION
Prewired terminal strip accepts field connection of any access control device with normally open
(N.O.) output contact (most access control equipment) and when required, a separate
OPEN/CLOSE pushbutton (supplied).
Plug-in connectors are included for addition of a loop detector to open and/or a loop detector to
hold open (not supplied). Activation of access device open button, or loop detector to open will
raise gate. Gate will lower automatically unless hold open loop detector is activated or unless
CLOSE button wiring has been made, in which case gate will remain open until CLOSE button is
pushed.
An optional timer will extend the time that the gate remains open. AUTO/MANUAL switch holds
arm in vertical position.
SPEED REDUCTION
Wormgear-in-oil-bath, 60:1
ARM TYPE
MODEL BG770: One piece type to 12 feet.
MODEL BG790: Counterweighted wishbone type to 24 feet.
ARM SPEED
MODEL BG770: Opens in 4 seconds
MODEL BG790: Opens in 11 seconds
LUBRICATION
Permanently lubricated bearings in motor. Low temperature gear oil normally never needs
replacement. Gear oil is Mobil SHC 630 or equivalent.
MOUNTING
Pad mount
ENCLOSURE
Weatherproof, heavy gauge, pregalvanized steel, powdercoat finish, top and side access covers
with key lock.