GeoVision ST124SLD User Manual
ST124SLD Electric Strike
Featured with a built-in door status sensor, the ST124SLD is a fail-secure electric strike, but
it is field convertible from fail secure to fail safe. It can be mounted either right or left
reversibly on the doorjamb, providing remote release of a locked door.
Packing List
1. ST124SLD electric strike x 1
3. Clip nut x 2
5. Extension plate x 2
7. Varistor x 1
9. #10-32 screw x 2
2. Aluminum spacer x 6
4. Lock washer x 2
6. Clip x 2
8. M4 screw x 2
10. #8-32 flat-head screw x 2
Installation
1. Prepare the doorjamb per drawing.
Figure 1
2. Install the mounting brackets to the doorjamb by using the #8-32 x 1/2” flat-head screws
and the pressed metal nuts (Figure 2). Do not tighten yet.
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2
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3. Spacers are provided to ensure the final assembly of faceplate into the doorjamb. Add
one of spacers between the doorjamb and the mounting bracket when faceplate extends
beyond the doorjamb. When the faceplate sets inside the jamb, spacers must be added
between the mounting bracket and the tip bracket. Make sure the clearance hole in the
spacer aligns with the hole in the mounting bracket.
Figure 2
5. Install the electric strike to the doorjamb by using the #10-32 screws and the lock
washers (Figure 2).
6. Tighten the #8-32 flat-head screws to hold the mounting brackets to the doorjamb (Figure
2).
7. To prevent strike from spike, connect the Varistor between the input power wires (Figure
3).
8. To modify fail-safe to non fail-safe or vice versa.
A. Unscrew the electric strike as illustrated below.
B. Reverse the solenoid to the opposite side and then close.
Figure 4
4. Connect the wires from the low voltage side of the transformer to the black wires of the
electric strike.
Figure 3
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Wire Definition
Wire Definition
Electric Bolt
Lock Status Sensor
Door Status Sensor
Black Positive (+) or Ground (-)
Black Positive (+) or Ground (-)
Green NO
Grey COM
Orange NC
Blue NO
White COM
Yellow NC
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