Loop Inputs; Photo/Edge Inputs (P6-7-8 And 9) - Chamberlain LA400 Owner's Manual

ADDITIONAL FEATURES

LOOP INPUTS

OPEN INPUT AND EXIT LOOP
These terminals are intended for use as a general open control. Accessories such as
telephone entry systems, radio receivers (open only applications), exit loop
detectors, keypads and 7-day timers may be wired to this input.
SHADOW LOOP INPUT TERMINAL AND COMMON
This input protects cars by preventing the gate from moving off of the open or close
limit when the shadow loop input is active.
NOTE: Shadow loop is disabled when gate is moving.
INTERRUPT LOOP INPUT TERMINAL AND COMMON
This input functions to reverse a closing gate to the open limit. Latching this input
will reset the timer to close.

PHOTO/EDGE INPUTS (P6-7-8 AND 9)

TERMINAL P6 – CLOSE SAFETY EDGE
This input will reverse a closing gate. It will disable the Timer-to-Close if that feature
has been enabled. Activating this input while the gate is opening will have no effect.
Order part number LA400-BOX to enclose safety electronics.
TERMINAL P8 – OPEN SAFETY EDGE/PHOTOELECTRIC SENSOR (ENTRAPMENT)
If an Open Edge device or a Retro-Reflective Photoelectric Sensor has been
connected to Terminal P8, then this input will reverse an opening gate for 2 seconds
then stop. Activating this input with an Open Edge device or a Retro-Reflective
Photoelectric Sensor connected to Terminal P8 while the gate is closing will have no
effect.
If a Chamberlain Pulsing Photoelectric Sensor (See Accessories) has been connected
to Terminal P8, then this input will pause an opening gate until the obstruction
has been removed. Upon removing the obstruction, the gate will continue to open.
Activating this input with a Chamberlain Pulsing Photoelectric Sensor
(See Accessories) connected to Terminal P8 while the gate is closing will have
no effect.
TERMINAL P7 – OPEN SAFETY PHOTOELECTRIC SENSOR (ENTRAPMENT)
This input will pause an opening gate until the obstruction has been removed. Upon
removing the obstruction, the gate will continue to open. Activating this input while
the gate is closing will have no effect.
TERMINAL P9 – CLOSE SAFETY PHOTOELECTRIC SENSOR
This input will reverse a closing gate to the open limit. Activating this input while the
gate is opening will have no effect. The Timer-to-Close will reactivate at the open
limit.
» LOOP INPUTS + PHOTO/EDGE INPUTS (P6-7-8 AND 9)
37
LOOP
INPUTS
SHADOW
INTERRUPT
GR COM
LD
A 32V
BATT 2 BATT 1
S8
LOOP
INPUTS
C2
CLOSE
EDGE
OPEN EDGE/
PHOTO
OPEN
PHOTO
CLOSE
PHOTO
C2
NORMALLY OPEN SHADOW LOOP
NORMALLY OPEN INTERRUPT LOOP
COMMON LOOP
EXIT LOOP
NOTE: Additional enclosure required.
Refer to loop detector manufacturer
instructions for connections.
CLOSE
EDGE
OPEN EDGE
PHOTO
brown
brown
blue
blue
OPEN
brown
PHOTO
blue
CLOSE
PHOTO brown
blue