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LR: Door Interlock
For Use With Retiring Cam
This interlock has two contacts, wired in series
together as part of the safety circuit. The upper
is the door contact, the lower is the locking
contact which is both electrical and mechanical.
The interlock mounts on the door jamb or frame
inside the hoistway. The locking latch mounts to
the inside door edge. When the door is closed,
the upper (door) contact is made. When the
retiring cam is retracted the bottom contact is
made and the solid brass hook catches behind
the locking bar, mechanically locking the door.
When the car stops at a floor the retiring cam
pushes the release roller, mechanically unlocking
the door and opening the bottom electrical
contact. When the door is opened the top
contact drops by gravity.
Although this is designed for use with a retiring
cam it can be used with a stationary cam.
The LR is made for either right-hand or left-
hand mounting. The hand is determined by
standing inside the elevator looking out. The
side on which the lock is to be mounted (left or
right) is the hand to be ordered.
MODELS AVAILABLE
STANDARD-HEAVY DUTY
78202-RH
LR: Right Hand
78202-LH
LR Left Hand
HAZARDOUS LOCATION
78202HS-RH
LR: Right Hand
78202HS-LH
LR Left Hand
(Class 1, Division 2)
ACCESSORIES
790-501
ARC Retiring Cam
77784-C
EB-Surface Mounting
Emergency Box with
Glass Cover
77784-K
KEB-Surface Mounting
Emergency Box with
Lockable Metal Cover
Ordering Information
239
Item: 790-501
ARC Retiring Cam
Specify Voltage
LR Left Hand Interlock Pictured
Item: 77802HS-LH
Hazardous Location, Sealed Contacts
LR Door Latch
Item: 77802HS-LH
Three different views, Front, End & Top