User Guide

PAGE 3
IB/B-T/06
INTERLOCK INSTRUCTION MANUAL
KIRK Door/Access Interlocks (Type D, Type DM, Type DY)
Type D Door Interlock
All Type D interlocks have two parts: a main body with one or more cylinders and a latch block. Proper alignment of both
parts is crucial to the operation of a Type D interlock. When the main body is separated from the latch block, the lock bolt
is retained in the withdrawn position by concealed latch pins. Thus the key(s) is always held in the lock whenever the two
parts are separated. When the door on which the interlock is mounted is properly closed, the key(s) can be turned to
extend the lock bolt into the latch block, securing the door. Only extending the lock bolt, after properly closing the door,
should allow release of the key(s). An exception to this rule is a multiple cylinder Type D interlock which allows release of
a "personnel" key when the door is opened. The personnel key can be put in the pocket of the maintenance person
ensuring that the door cannot be closed and locked as long as he holds the personnel key.
Type D Terminology
Lock Body
Latch Block
The key is trapped in type D interlock when the door is open.
Mounting Options for Type D Locks and Latch Blocks
KIRK door interlocks should not be used to align the door, or be the latching means for holding the door in the closed
position. Type DM or DY interlocks should be utilized in situations where the door and door-frame are ill-fitting, and a
degree of latitude is required.