Alarm Lock DL4100: Complete Specification and Application Guide

The Alarm Lock DL4100 is Alarm Lock's most widely specified standalone digital lock — a Grade 1 cylindrical pushbutton lock with a built-in privacy pushbutton, 2,000 user codes, and a 40,000-event audit trail that requires no wiring and no network connection. It runs on five AA batteries, operates across temperatures from -31°F to +151°F, carries a 3-hour fire-rated latchbolt, and logs every access event with a real-time clock accurate to within one second. For healthcare on-call rooms, restrooms, file rooms, dressing rooms, and any commercial space requiring both access control and occupant privacy, it is the correct standalone specification. This guide covers every spec, every feature, and what to confirm before ordering.

The Mechanical and Electronic Design Behind the DL4100

Understanding why the DL4100 holds a Grade 1 BHMA certification starts with its clutch mechanism. The outside lever free-turns in the locked position — it does not resist or bind against the lock body when an unauthorized person attempts entry. That free-turning action eliminates the spindle stress and internal loading that causes Grade 2 and residential locksets to fail under repeated forced-entry attempts. The lever retracts the latch only when an authorized PIN or remote bypass releases the mechanism. The inside lever, by contrast, is always in passage mode -instant egress from the inside is never blocked, which meets code requirements for occupied spaces across healthcare and commercial occupancies.

Internally the DL4100 uses non-volatile memory for both programming data and audit trail storage. If the batteries are removed or fully discharged, no programming is lost and no audit events are deleted. This matters in facilities where battery replacement is irregular or where the lock sits in a remote area of a building without regular maintenance access.

The 12-button all-metal keypad is weatherproof and rated for both interior and exterior installation across the full -31°F to +151°F temperature range. The housing dimensions are 8 inches high by 3-1/4 inches wide by 1-7/8 inches deep on the outside face, which fits standard commercial door dimensions without modifications.

Privacy, Residency, and Lockout: Three Features Specifiers Confuse

These three terms appear across every DL4100 listing online and are consistently misunderstood as variations of the same function. They are not.

Privacy mode is activated by the occupant pressing the pushbutton on the interior housing after entering with their PIN. Once active, no keypad code entered from the exterior will retract the latch. The tri-color LED on the exterior keypad flashes to indicate the room is occupied. The privacy session ends when the occupant opens the door from the inside, or it can be configured to time out automatically after a programmable duration. This is the function specified for single-occupancy restrooms, healthcare exam rooms, and changing rooms.

Residency mode works in the opposite direction. After a user exits through the door and closes it behind them, the lock remains in passage mode — unlocked — until it is physically relocked by entering a PIN from the outside. No key or code is needed to reenter. This is specified for residential units, on-call sleeping rooms, and any application where a user needs to step out briefly and return without credential intervention.

Temporary keypad lockout activates after three consecutive incorrect code entries from the exterior keypad. The keypad locks out for a programmable period, preventing brute-force PIN guessing attempts. This function runs automatically and does not require administrative action to reset. It is the security feature that justifies the DL4100 for sensitive applications including file rooms, executive offices, and confidential storage areas.

Full Technical Specifications

Access and programming:

• User codes: 2,000 individual PINs, 3 to 6 digits each

• Code levels: master, manager, supervisor, basic user, one-time service codes, total lockout code

• Scheduled events: 500, with four built-in time schedules and four time-out functions

• Programmable entry time: 3, 10, or 15 seconds  the window the lever remains operable after a valid PIN

• Relay programming: relay can be configured to energize when one or more selected events occur

Audit and monitoring:

• Audit trail capacity: 40,000 events, time and date stamped

• Real-time clock accuracy: events logged to within 1 second

• Per-schedule audit history: 1,600 events per timed event schedule

• Retrieval methods: AL-DTMIII handheld data transfer module, AL-PCI PC interface, AL-IR1 handheld infrared printer on site

Physical specifications:

• Outside housing: 8 inch H × 3-1/4 inch W × 1-7/8 inch D

• Keypad: all-metal weatherproof 12-button

• Door thickness: 1-5/8 inch to 1-7/8 inch standard; S6072 spacers for 1-3/8 inch doors

• Backset: 2-3/4 inch standard; 2-3/8 inch available

• Strike: 1-1/8 inch × 2-3/4 inch T strike standard; 1-1/4 inch × 4-7/8 inch ASA strike included

• Cylinder: solid brass 6-pin tumbler, SCI keyway, in standard key override models

Power and environmental:

• Power: 5 AA alkaline batteries included

• Battery life: approximately 60,000 cycles typical

• Operating temperature: -31°F to +151°F

• Audible low battery alert with visual indicator

Compliance:

• BHMA Grade 1 heavy-duty cylindrical lockset

• UL 10C Positive Pressure Specification listed

• 3-hour fire-rated latchbolt

• FCC certified

• ADA-compliant lever

IC Core Variant: What Changes and What Does Not

The DL4100IC is the interchangeable core version of the same lock. Every functional specification -2,000 user codes, 40,000-event audit trail, privacy and residency features, weatherproof keypad, fire rating - is identical. The difference is the cylinder.

The IC Core model accepts 6 or 7-pin interchangeable cores from Arrow, Best, Falcon, KSP, and Kaba Peaks. Alarm Lock supplies the correct tailpiece for IC core cylinders. Preps for Yale, Medeco, Corbin Russwin, Sargent, and Schlage IC cores are also available. The standard model ships with the solid brass 6-pin cylinder and key override; the IC version ships less core, ready for the facility's existing IC core program.

For facilities already on a Grand Master or small format IC (SFIC) keying system healthcare campuses, universities, and government buildings being the primary examples the IC Core model is the correct specification. It eliminates a separate cylinder order and integrates the DL4100 into the facility's existing mechanical key hierarchy.

Where American Locksets Fits This Specification

Twenty-four years of supplying Alarm Lock hardware from authorized distribution means we have configured the DL4100 for enough different facility types to know where the specification decisions usually go wrong. The most common: ordering the standard cylinder model for a facility on an IC core masterkey system, or not confirming the programmable entry time requirement against the specific application before the order ships.

American Locksets stocks both the DL4100 26D Satin Chrome and the DL4100IC version from authorized Alarm Lock distribution. When the project also requires PIN plus proximity credential access on the same door, the PDL4100 adds RFID reader capability, reading most HID card and key fob formats, within the same form factor. The full Alarm Lock Trilogy line, from the DL2700 through the DL4500 mortise version, is available through our keypad and prox locks section.

For projects where the DL4100 sits alongside electronic hardware including power supplies, or alongside commercial locks on non-keypad doors in the same facility, everything ships from a single authorized dealer order. Same-day shipping from multiple US warehouses.

Call 877-471-4870 before ordering. We confirm cylinder type, finish, entry time requirement, and whether the DL4100 or a different Trilogy model fits the application before the product ships.

Conclusion

The Alarm Lock DL4100 is a standalone Grade 1 digital lock with three specific capabilities competitors lack: a privacy pushbutton that locks out all keypad codes from the entry side with a flashing LED status indicator, a residency mode that keeps the door unlocked after the user exits until physically relocked, and a 40,000-event audit trail logged to within one second by a real-time clock. It runs without wiring, retrofits most existing cylindrical door preps, and operates across -31°F to +151°F on five AA batteries. IC Core and standard key override models are both in stock. American Locksets carries the Alarm Lock DL4100 from authorized distribution with same-day shipping. Call 877-471-4870 to confirm the right variant before ordering.

Frequently Asked Questions

How many user codes does the Alarm Lock DL4100 store?

2,000 individual PINs of 3 to 6 digits, organized across master, manager, supervisor, basic user, one-time service, and total lockout levels.

What happens after three wrong PIN entries on the DL4100? 

The keypad enters a temporary lockout, blocking all further entry attempts for a programmable period. It resets automatically — no administrative action required.

How is the DL4100 audit trail accessed and how accurate is it? 

Via the AL-DTMIII module, AL-PCI interface, or AL-IR1 infrared printer. The real-time clock logs every event to within one second accuracy.

Does the DL4100 require wiring or a network connection?

 No. Five AA batteries included with the lock power the unit. Optional hardwiring with a 9VDC or 9VAC supply is available for continuous power backup.

What is the difference between the privacy and residency features? 

Privacy locks out all exterior keypad codes while the room is occupied. Residency keeps the door unlocked after the user exits, until physically relocked by PIN.

Is the Alarm Lock DL4100 fire rated?

 Yes. The latchbolt is UL Listed and 3-hour fire rated. The lock is BHMA Grade 1 and UL 10C Positive Pressure Specification listed.

Where can I buy the Alarm Lock DL4100? 

American Locksets stocks both the standard and IC Core DL4100 variants with same-day shipping. Call 877-471-4870 for specification support.

Published by the American Locksets Hardware Team. Authorized Alarm Lock Dealer, Est. 2001, Monroe, NY.