
Electrified Locks Functions and Parts
3–4 W Series Service Manual
Electrified
cylindrical
functions
The following lists describe how the latchbolt, outside lever/knob, and
inside lever/knob operate for each electrified cylindrical function.
TRIM COMPONENTS
Refer to the figures and tables that follow to find the part you need or to
convert the function of the lock.
Figure 3.2 Understanding cylindrical function drawings
DEL–Electrically Locked–Fail Safe DEU–Electrically Unlocked–Fail Secure
Latchbolt operated by:
■ inside lever/knob
■ outside lever/knob when
electric power is removed
from the solenoid
■ outside key
Outside lever/knob locked
by:
■ applying 24 VDC to the
solenoid; remains locked only
while power continues to be
applied
Outside lever/knob unlocked
by:
■ removing 24 VDC from the
solenoid
Inside lever/knob is always
unlocked
Latchbolt operated by:
■ inside lever/knob
■ outside lever/knob when
electric power is applied to
the solenoid
■ outside key
Outside lever/knob locked
by:
■ removing 24 VDC from the
solenoid
Outside lever/knob unlocked
by:
■ applying 24 VDC to the
solenoid; remains unlocked
only while power continues
to be applied
Inside lever/knob is always
unlocked
InsideOutside
Latchbolt
View looking down
at the top of the door
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