FS23MIV dual failsafe feature is available only from SDC. Conventional failsafe locking bolts
rely solely on a spring to retract the bolt while the FS23M bolt will unlock with or without the
assistance of the spring. This is the only electric bolt lock listed by the California State Fire
Marshal for locking of perimeter entrance and emergency exit doors after-hours.

Face Plate: 8”L x 1-1/2”W x 1/8”D - standard
Strike: 4”L x 1.5”W x 1-9/16”D
Bolt Material: Nylon with Center Magnet
Bolt Diameter: 5/8”
Bolt Throw: 5/8
Mounting Tabs: Two Aluminum Mounting Tabs Are Provided for Easy Lock Installation
Dual Voltage Coil:         0.45 Amp @ 24VDC Continuous Duty
                                         0.9 Amp @ 12VDC Continuous Duty

SPECIFICATION GRADE SOLENOIDS
All Spacesaver® lock solenoids are manufactured by SDC
to precision specifications. SDC solenoids are capable for
superior overall performance in both force and longevity,
providing years of service compared to other manufacturers off-the-shelf or commercial grade designs.

DUAL FAILSAFE
The SDC designed and patented
FS23M
is locked when
energized. Recommended for safety applications, the door
unlocks automatically when power is interrupted by the
access control, power failure or a signal from the fire life
safety system.
Large repelling magnets are located within the bolt and
strike. When power is interrupted the bolt is retracted and
held back by a spring. Should the spring fail, repelling
magnets eject the bolt from the strike, unlocking the door.
While designed for perimeter applications the performance
characteristics of the
FS23M
make it the first choice for all
interior or exterior openings where the use of an electric
bolt lock is applicable.

BOLT DESIGN
The bolt is made of a lightweight and extremely resilient
nylon material. While lack of weight enables the magnet to
eject the bolt, an inherent feature is powerful and smooth
operation. The longevity of this lock is unsurpassed compared to electromechanical locks with steel bolts with abrasive metal to metal interaction.
Additional bolt features include:
• 2500lbs Bolt Strength
• Hardened Magnet Core, Resistant to Metal Cutting Saws