LiftMaster BG770 Industrial-Duty Single Arm Barrier Gate Operator - Manual (Page 12)

12
VEHICLE DETECTORS
Almost all types of vehicle detectors may be used in conjunction
with both model BG770 and BG790. More than one detector may
be connected to the gate, and may be mounted inside of the
cabinet. Connect the detector(s) according to the instructions on
the wiring diagrams supplied with the gate and with the detector
itself.
FACTORY SUPPLIED PLUG-IN DETECTORS
LiftMaster P/N 71-416-7NH = 24V
PLEASE NOTE: Previous models used 115V detectors
(P/N 71-416-3NH).
OPEN LOOP DETECTOR
1. Snap the detector onto one set of the four board mount
standoffs located on the inside of the electrical cabinet. Plug the
harness into the connector marked “OPEN.”
2. Connect the two loop wires to terminals P1 and P2 as shown
on the wiring diagram.
HOLD OPEN LOOP DETECTOR
1. Snap the detector onto one set of the four board mount
standoffs located on the inside of the electrical cabinet. Plug the
harness into the connector marked “HOLD OPEN.”
2. Connect the loop wires to terminals P3 and P4 as shown on the
wiring diagram.
RADIO CONTROLS
All types of standard radio controls may be used in conjunction
with model BG770 and BG790. If the receiver is mounted inside of
the gate enclosure, a commercial coaxial antenna should be used
and extended through the side of the cabinet.
POWER CONNECTION
All radio receivers require a power supply. If the receiver requires
24Vac, you may power the unit from the gate control circuit. To
do this, connect the radio receiver power wires to Terminals #3
and #6 on the control terminal strip. If the receiver requires
115Vac or other power, you will need a separate power source.
A standard residential door radio receiver has a three wire
connection marked 1, 2, 3. If you have this type, you may connect
to operator terminals R3, R1, and R6. The transmitter button will
open the gate if it is fully closed.
CONTROL
If you have a standard residential 3 wire receiver and made the
power connection described above, you are finished with the radio
connections. If you want to use a radio control (such as a single
button), you must order an optional kit (P/N 90-PGR).
CARD READERS, KEYPADS OR OTHER
Almost all types of access control devices may be connected to
models BG770 and BG790. More than one device may be
connected in parallel. All devices connected according to the
instructions below will open the gate and reverse the gate if it
is closing.
MOUNTING LOCATION
Mount or install the access control device within sight of the gate
and according to the instructions supplied with the device. Some
devices require their own power supply. Do not use the 24 volt
power in the gate to supply other devices. Use either direct line
voltage (115V or 230V) or other external power source as
required by the particular device.
NOTE: Most access control devices have an isolated, normally
open output contact to connect to the gate. If yours does not, or if
you are unsure of or unfamiliar with these terms, consult the
supplier of the device or a qualified gate installer.
CONTROL CONNECTION
TURN OFF POWER and connect the two output terminals (or
wires) of the access control device to the terminals #1 and #3 on
the control wiring terminal strip. Use a wiring method that will
provide a permanent, durable and weatherproof connection
between the gate and the access device.
O P T I O N A L A C C E S S O R I E S
Turn off power BEFORE working inside gate enclosure.
CAUTION