120MC Half-Cycle Deadlatch Electro-Mechanical Locks

Standard Features_______
■ Motor voltage – 120 VAC
■ Superior durability – Working parts of
stainless steel afford greater strength
and corrosion resistance.
■ Standard lock size – All models use
the same size case, cover and mounting
holes for simplified installation and
frame preparation.
■ External two-piece plug connector –
All models install without cover
removal. Simple plug-in connection to
field wiring.
■ External mounting holes – Easy
installation, and eliminate the need for
cover removal.
■ Standard lock – Mounts behind frame
and does not require a faceplate.
■ 1″ throw latchbolt – Offers greater
security. Each bolt is hardened to resist
sawing. When latchbolt is engaged in
strike, bevel is concealed to prevent
■ Mechanical unlocking by key – Specify
Folger Adam Mogul cylinders, MaxiMogul®
high security cylinders or other
Mogul cylinders.
■ Investment-cast stainless steel strike –
Furnished with four tamper-resistant
■ Fractional HP Motor – Permanently
lubricated for smooth quiet operation
with thermal overload protection and a
brake for accurate locking position.
■ Finish – Zinc plated case and cover

SKU: 120MC Categories: ,


Series 120MC Deadlatches are pin
tumbler, motor-operated locks utilizing a
two-position motor cam.
Specify keying as follows:
121 Keyed case side
122 Keyed cover side
126 Keyed both sides
Standard (1): Unlocks when the motor is
energized by either a two or three
position, maintained contact switch, or a
three position momentary contact switch.
Once unlocked, the latchbolt remains
retracted until it is selected to lock.
Opening and closing the door has no
effect on the lock when selected to
unlock. The latchbolt extends only when
the door is opened and the motor is
selected to lock. If the door is closed, it
must be opened to extend the latchbolt.
Two additional variations on this feature
are offered:
Without latchback (1a): Once unlocked,
the latchbolt is held retracted only as long
as the motor remains in the unlocked
position. A maintained-contact switch may
be used to keep the latchbolt retracted for
an extended period of time.
Relock (1b) 09: Once unlocked, the
latchbolt is held retracted until the door is
opened. It then extends automatically.
This operation requires an additional
control wire, and may be cancelled by
adding an additional control switch. A
momentary-contact switch is used for
unlocking, and the auxiliary switch is used
for relocking. When the door is opened,
the auxiliary switch repositions the motor
to a locked position so that the lock will
deadlatch on closure.
Knob release(2): 120MC Deadlatches
may be specified with knob release on
one side, where the knob is always active.
Knob may be mounted on the case side,
or the cover side.
Key holdback (3): When unlocked by key,
the deadlatch remains retracted until
relocked by turning the key in the opposite
direction. Available one side only.
Note: Key cylinders for locks with key holdback
feature must be installed at the factory.
Series 120MC Deadlatches are suitable for
use in medium or maximum security
situations to lock cell, corridor or entrance
doors. Especially appropriate for areas
requiring the latchbolt to remain retracted
until it is selected to lock again.
Like all Series 120 locks, the jambmounted
120MC Deadlatch is designed
for use as part of an electrical system with
remote operation and monitoring.

© 2017, Best Brothers Group. All rights reserved.


Folger Adam


■ Case and cover – 10 gauge steel.
■ Latchbolt – Investment-cast
stainless steel, hardened, 1″ throw.
■ Deadlock lever – Stainless steel,
adjustable for door gap variations.
■ Bolt opening – Does not allow
access to mechanism.
■ Roller bolt – Investment-cast
stainless steel with stainless steel
■ Operating lever – Stainless steel to
operate with motor.
■ Strike – Investment-cast stainless
steel, attached with screws in two
■ Motor – 120 VAC continuous duty,
24 VAC or 24 VDC optional,
synchronous-type gearmotor.
■ Springs – Stainless Steel.

© 2017, Best Brothers Group. All rights reserved.

Electrical Characteristics

■ AC motors – Synchronous-type
gearmotor with brake.
120 VAC: 60 Hz, 1.3 amps at full
■ DC motors – Permanent-magnet
Ratings: 24 VDC, 2.2 amps at full
■ Switches – SPDT, UL Listed,

© 2017, Best Brothers Group. All rights reserved.