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August 31, 2026 5 min read
Installation manual for the SECO-LARM Enforcer Electric Deadbolt series (SD-997A-DQ, SD-997BQ, SD-997B-GBQ).
SECO-LARM Electric Deadbolts add concealed deadbolt security to hollow metal door frames (door itself may be wood or metal). This covers the SD-997A-DQ, SD-997BQ, and SD-997B-GBQ models — electrically operated deadbolts with a stainless steel 5/8" diameter, 5/8" throw bolt, magnetic door position sensing, and adjustable lock delay timer.
| Spec | SD-997A-DQ | SD-997B-GBQ | SD-997BQ |
|---|---|---|---|
| Operation | Fail-secure | Fail-safe | |
| Operating voltage | 12VDC | 12/24VDC | 12VDC |
| Current draw (Standby) | 320mA@12VDC | 340mA@12VDC / 180mA@24VDC | |
| Current draw (Active) | 880mA@12VDC | 900mA@12VDC / 440mA@24VDC | |
| Status sensor | SPDT, 500mA @ 12VDC (NO/NC/COM) | ||
| Adjustable delay timer | 0/3/5/9 secs | 0/2.5/5/9 secs | |
| Weight | 2 lbs, 5 oz (1kg) | 1 lb, 13 oz (0.8kg) | |
SD-997A-DQ: Fail-secure (locks if power is lost), 12VDC. SD-997BQ: Fail-safe (unlocks if power is lost), 12VDC. SD-997B-GBQ: Fail-safe, 12/24VDC.
Can be mounted opposite the door hinges, on the header, or on top of the door away from the hinges. Mounting on the bottom of the door is not recommended due to possible dirt/dust buildup. Important: For vertical mounting of the SD-997B series only, wires must exit the top of the unit.
Note (SD-997A-DQ & SD-997B-GBQ only): the deadbolt automatically relocks 4 seconds after an optional external push button (egress button) is pressed, if the door was not opened. The lock body's sensor can detect if the strike plate is in close proximity (door closed); if the strike plate is misaligned, the lock body may attempt to relock multiple times and stop to prevent solenoid burnout if it fails. Important: the lock body and strike plate must be properly aligned and adjacent for correct function.
Pull the vinyl covering off the faceplate and place the faceplate over the face of the lock body, then use screws to fix the faceplate and lock body to the mounting tabs.
Important: do not cut wires before the plug, or the warranty will be voided.
| Problem | Possible Cause | Solution |
|---|---|---|
| Deadbolt does not activate when the door closes | The sensor in the lock body is too far from the magnet in the strike plate | Try adjusting the strike plate, lock body position, or shims |
| Deadbolt activates when the door is closed, but does not lock the door | Deadbolt may not be properly going into the deadbolt hole in the door | Confirm the deadbolt is entering the hole (reposition strike plate if not); if it's going in but hitting the bottom of the hole (wooden door), drill a deeper hole |
| How to reset unit | — | Momentarily ground the orange wire to reset |
| For any other problems | — | Replace the unit and test again; a working unit can be substituted in another door frame to isolate the issue |
SECO-LARM products are warranted against defects in material and workmanship for one (1) year from the date of sale to the original consumer customer, limited to repair or replacement of any defective part returned transportation prepaid to SECO-LARM. Warranty is void if damage is caused by acts of God, misuse/abuse, neglect, unauthorized repair or alteration, improper/abnormal usage, or faulty installation.
SECO-LARM U.S.A., Inc. — 16842 Millikan Avenue, Irvine, CA 92606. Phone: 800-662-0800 / 949-261-2999. Fax: 949-261-7326. Email: sales@seco-larm.com. Web: www.seco-larm.com.
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