SDC 1490AI Failsafe Extra Narrow Concealed Mortise Bolt Lock

Quick Guide from the Manual

The SDC 1490AI is a failsafe, extra narrow concealed mortise bolt lock designed for metal doors and frames. Installation involves mortising a cutout, attaching wiring, and securing the lock with mounting tabs. The unit features an adjustable Auto Relock Switch (ARS) to compensate for door gaps. For optimal performance and heat reduction, the use of the included PR-1000 Power Regulator is recommended.

Installation Instructions

Overhead Installation (Horizontal):

1. Examine the top rail of the door to locate the strike plate position. Mark the door for the end of the strike closest to the lock stile and make a corresponding mark on the header.
2. Locate the center line of the door thickness on the header. Attach the adhesive cutout template, center punch the tab-mounting screw locations, and counter-sink for #10 screws.
3. Saw or rout out the cutout area.
4. Attach mounting tabs inside.
5. Connect power supply and access control leads to the lock leads. Insert wiring into the header cavity carefully.
6. Insert the lock (bolt end nearest the lock stile) and secure with #10-32 machine screws.
7. Using the strike plate as a template, mark and drill screw holes. Mortise as required and attach the strike.

Sidejamb Installation (Vertical):

1. Examine the lock stile jamb for the point nearest the center of the door height. Mark the door stile horizontal for the top end of the strike plate and make a corresponding mark on the jamb.
2. Locate the center line of the door thickness on the jamb and attach the adhesive cutout template.
3. Center punch the tab mounting screw locations, counter-sink for #10 screws, and saw or rout the frame cutout.
4. Attach mounting tabs inside and proceed with wiring and lock insertion as described in the overhead installation steps. The bolt must be at the top end of the cutout.

Auto Relock Switch (ARS) Adjustment

The ARS is factory-set for a 1/8 inch clearance between the top of the door and the transom bar or head jamb. If there is a wider gap, you can compensate by:

• Loosening the lock nut.
• Turning the switch assembly clockwise until the proper adjustment is reached.
• Tightening the lock nut securely.

Wiring and Power Configuration

The solenoid is rated for continuous duty, but the PR-1000 Power Regulator is recommended to reduce power consumption and heat. The unit supports both 12VDC and 24VDC configurations. Ensure the power supply matches the solenoid voltage requirements. Detailed wiring diagrams for configurations with and without the PR-1000 are provided in the manual.

Troubleshooting

• Bolt does not project: Check voltage and alignment of the strike.
• Bolt projects but chatters: Voltage is too low.
• Bolt will not retract: Strike is mis-aligned.

Technical Data

• Face Plate: 8" x 1-1/4" x 1/8"
• Strike: 4" x 1-1/2" x 1/8"
• Bolt: 5/8" diameter, solid stainless steel
• Bolt Throw: 1/2"
• Power Requirements: 12VDC @ .9 Amp (Max) or 24VDC @ .45 Amp (Max)