Alarm Lock Trilogy DL3500DB Gr...
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$1,214.04
Alarm Lock Alarm Lock DL3500DB - Trilogy High Security Electronic Digital Mortise Locks with Deadbolt DL3500DB

Alarm Lock Trilogy DL3500DB Grade 1 Electronic Mortise Lock with Deadbolt - 300 User Codes

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Model: DL3500DBR US26D
$2,425.21
$1,214.04
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$2,425.21
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Alarm Lock Trilogy DL3500DB Grade 1 Electronic Mortise Lock with Deadbolt - 300 User Codes

Professional High Security Digital Access Control with Advanced Programming

Grade 1 mortise lock in Alarm Lock's Trilogy T3 family, offering PIN-based access, audit trail logging, and time-based scheduling in a standalone, non-networked format with classroom or deadbolt option. The Alarm Lock Trilogy DL3500DB delivers Grade 1 commercial security with electronic mortise lock functionality and integrated deadbolt protection. This battery-operated system supports 300 user codes with master, manager, supervisor and basic user levels, featuring a 12 metal button keypad for reliable access control. Compatible with door thickness range of 1-5/8" to 1-7/8" and 2-3/4" backset, the weatherproof construction operates reliably in temperatures from -31°F to +151°F for demanding commercial environments.

Professional Features & Benefits

  • Grade 1 Security Rating: Meets the highest commercial security standards for heavy-duty applications and maximum durability in high-traffic environments.
  • 300 User Code Capacity: Accommodates multiple access levels including master, manager, supervisor and basic users for comprehensive access management.
  • Extended Battery Life: 5AA battery-pak operation delivers 75,000 cycle battery life with low-battery alert for reliable long-term performance.
  • Comprehensive Audit Trail: 40,000 event audit trail provides detailed time/date-stamped logging of all electronic activity for security monitoring and compliance.
  • Advanced Scheduling: Real time clock with 500 scheduled events enables automated lock/unlock scheduling and holiday programming for operational efficiency.
  • Weatherproof Construction: Operates reliably in temperatures from -31°F to +151°F (-35°C to +66°C) for indoor and outdoor applications.
  • Flexible Programming: PC programming capability supports fingertip or Windows PC programming with data transfer via AL-PCI2 or AL-DTMIII for flexible configuration.
  • Professional Keypad: 12 metal button electronic keypad provides durable input interface for commercial applications.

Technical Specifications

  • Door Thickness: Fits 1 3/8" to 1 7/8"
  • Strike: 1 1/4" x 4 7/8" strike included
  • Handing: Specify RH or LH when ordering; lock is reversible in the field
  • Power: 5 AA alkaline batteries (included)
  • Keypad: All metal, 12 button. All functions programmed through keypad.
  • Compliances: Steelcase lock body meets BHMA specifications for Grade 1 locks. UL Listed to the 10C Positive Pressure Specification. ADA compliant levers
  • Functions: Classroom function: stainless steel latchbolt with 3/4" projection & deadlocking latch. Deadbolt function: stainless steel deadbolt with 1" projection, latchbolt with 3/4" projection & deadlocking latch. Deadbolt may be projected from key cylinder (outside) or turn-piece (inside).
  • Cylinder: 1 3/8" mortise cylinder supplied. Accepts 1 3/8" to 1 1/2" mortise cylinder.

Installation & Operation

  1. Verify door preparation meets manufacturer specifications for mortise lock installation including door thickness range of 1-5/8" to 1-7/8" and 2-3/4" backset requirements.
  2. Use manufacturer-provided templates to accurately mark mortise pocket and mounting hole locations on door and frame.
  3. Prepare mortise pocket in door and route frame for strike plate according to manufacturer specifications for T-Standard and ASA door strikes.
  4. Install mortise lock body in door pocket and secure mounting hardware per manufacturer torque specifications.
  5. Install 5AA battery-pak and configure initial programming including master codes and user access levels as required.
  6. Test lock operation including keypad entry, deadbolt function, and audit trail logging to verify proper installation and programming.
  7. Complete final inspection and document programming settings. Refer to manufacturer documentation for complete installation details and AL-PCI2 or AL-DTMIII programming instructions.

Professional Applications

  • Commercial Office Buildings
  • Healthcare Facilities
  • Educational Institutions
  • Government Buildings
  • Retail Establishments
  • Multi-Tenant Properties
  • Industrial Facilities

Why Choose Alarm Lock Quality?

Alarm Lock Trilogy electronic locks deliver proven reliability with Grade 1 commercial rating and weatherproof construction rated for temperatures from -31°F to +151°F. The 75,000 cycle battery life and comprehensive 40,000 event audit trail capability provide professional-grade security management for demanding commercial applications where dependable access control is essential.

Product Specs

Series:
DL3500 Series
Grade:
Grade 1
Keypad:
Electronic, 12 metal buttons
Power:
Battery Operated
Product Type:
Mortise Locks
Application:
Pushbutton Keypad
Lock Type:
Mortise
Product Group:
Mechanical Locks
Product Subgroup:
Mortise Locks and Trim
Subcategory:
Mortise Locks
Reader Type:
Keypad
Commercial/Residential:
Commercial
Electronic:
Yes
Battery Operated:
Yes
Batteries:
5AA battery-pak operated, 75,000 cycles
Audit Trail:
Yes
User Codes:
300
Weather Proof:
Yes
Product Attribute:
Electronic Locks
Product Model:
DL3500
Product Function:
Deadbolt
Door Thickness Range:
1-5/8" to 1-7/8"
Door Strike:
T-Standard and ASA
Product Category:
Electronic Locks
Backset (Distance):
2-3/4"
Department:
Door Hardware

Alarm Lock DL3500DBR US26D – Frequently Asked Questions

1) Will the Alarm Lock Trilogy DL3500DB fit a 1-3/4 inch commercial door?
Yes. The DL3500DB electronic mortise lock covers a door thickness range of 1-5/8 to 1-7/8 inches, so a standard 1-3/4 inch commercial door sits in the middle of that band. It mortises with a 2-3/4 inch backset, which is the usual backset on commercial mortise prep. On a thinner 1-3/8 inch interior door it will not fit.
2) Will the DL3500DB deadbolt latch into my existing mortise strike, or do I have to re-prep the frame?
The lock ships with a 1-1/4 x 4-7/8 inch strike and is set up for T-Standard and ASA frame prep. If your frame already carries an ASA strike cutout from an existing mortise lock, the DL3500DB drops into it. The deadbolt throws 1 inch and the stainless latchbolt projects 3/4 inch with a deadlocking latch, so the strike pocket has to be deep enough for a full 1 inch bolt, not just a latch keeper.
3) Do I have to order the DL3500DB left hand or right hand, or is it reversible?
Handing is a required choice at order time, left hand or right hand, and both are stocked in US26D satin chrome. The lock is field reversible, so if the opening turns out to swing the other way an installer can flip it on site without a replacement part.
4) What mortise cylinder does the Alarm Lock DL3500DB take, and can I key it into my building's existing system?
A 1-3/8 inch mortise cylinder comes with the lock, and the case accepts 1-3/8 to 1-1/2 inch mortise cylinders, so you can swap in a cylinder from your own keyway to bring the door onto the building master key. Keying is a required selection when ordering: keyed different, keyed alike, or supply your own key code to match an existing system.
5) Is the Alarm Lock DL3500DB approved for a fire rated opening?
The lock body is UL Listed to the 10C Positive Pressure Specification and the steel lock case meets BHMA Grade 1 requirements, with ADA compliant levers. That combination is what a fire door assembly and an accessibility review typically call for on a commercial opening.
6) Can an electronic keypad lock like the DL3500DB go on an exterior door that sees weather?
This one can. The DL3500DB is built weatherproof and operates from -31F to +151F, so an unheated stairwell, a loading dock, or a gate house door is within range. Many keypad mortise locks are indoor-only; if the opening is exposed, that temperature band is the spec to check against your climate.
7) Does the DL3500DB need to be wired for power?
No wiring. It runs on a 5 AA alkaline battery-pak that ships with the lock, rated for roughly 75,000 cycles with a low battery alert before it dies. That is what makes it a retrofit for an opening with no power at the frame. If you do have power run to the door and want the access control system to lock and unlock it centrally, a wired device is the right call instead, such as the BEST 45HW electromechanical mortise lock with 12V/24V operation or the Command Access ML190 motorized mortise lock at 24VDC.
8) I want a card or fob credential instead of a PIN code on a mortise lock. What should I use?
The Alarm Lock DL3500DB is a keypad reader lock, so entry is by PIN code. For credential-based access on a mortise lock, the TownSteel FME-2000 is a Grade 1 heavy duty classroom mortise lockset with RFID technology, and the Dormakaba Saffire LX-I-M002 is an electronic RFID mortise lockset with BLE mobile access at BHMA Grade 2. The Accentra NTM623-NR nexTouch Generation 3 uses a capacitive touchscreen keypad with cylinder override and no deadbolt. The Schlage Electronics LEMD-GRW is a Grade 1 ENGAGE Series wireless mortise lock with a 125kHz proximity reader and a mobile enabled deadbolt.
9) What is the closest equivalent to the Alarm Lock DL3500DB if I need a keypad mortise lock with a deadbolt?
The Alarm Lock DL3500DB is a Grade 1 electronic mortise lock with a deadbolt function and a 12 metal button keypad. The closest peers on the same idea are the Dormakaba E-Plex E5086, a Grade 1 electronic pushbutton and card mortise lock in the E-Plex 5X86 series, and the BEST 45HZ EZ Series electronic keypad mortise lock with key override. The Dormakaba E-Plex 2066 is also a pushbutton keyless mortise lock, in the E-Plex 2000 series. If the deadbolt itself is the requirement, confirm that against the peer you pick; the DL3500DB carries deadbolt as its stated function.
10) The opening does not need electronic access control. What mechanical mortise lock covers the same door?
If PIN codes, audit trail, and scheduling are not needed, a keyed mechanical mortise lock covers the same opening. The Corbin Russwin ML2003 is a Grade 1 mortise classroom lockset in the ML2000 series for 1-3/4 inch doors. The Cal-Royal NM8440 is a Grade 1 privacy mortise lockset with deadbolt for 1-3/4 inch doors, and the Cal-Royal NM8070 is the Grade 1 classroom version. The Sargent 7925 is a Grade 1 heavy duty corridor/dormitory mortise lock with rose trim and a single cylinder deadbolt. All are Grade 1, the same rating the DL3500DB carries.
11) I need the mortise lock tied into an access control panel with power at the door. Is the DL3500DB the right choice?
The Alarm Lock DL3500DB is battery operated on a 5AA battery-pak rated 75,000 cycles and is a standalone keypad lock, so it is not wired to a panel. For a hardwired opening, the BEST 45HW is a wired electromechanical mortise lock with 12V/24V operation, the Command Access ML190 is a motorized mortise lock with field selectable EL/EU operation and 24VDC power in a storeroom function, and the Schlage L9092EU with 03A trim is an electric lock/unlock outside lever mortise lock with request to exit at 12/24VDC.
12) Which keypad mortise locks look like substitutes for the DL3500DB but are not?
A few keypad and electronic mortise locks differ in ways that matter at the opening. The Accentra NTM623-NR nexTouch Generation 3 is explicitly no deadbolt with cylinder override, so it does not cover a deadbolt requirement. The Codelocks CL2255 is a medium duty electronic tubular mortise latch in the CL2000 series, a latch rather than a Grade 1 deadbolt lock. The Schlage CO-100 standalone electronic mortise lock with keypad reader is a Grade 1 privacy function, which is a different function from a deadbolt. The Alarm Lock DL3500DB is Grade 1 with a deadbolt function.
13) For a classroom door where staff need to lock down from inside, is the DL3500DB or an intruder-function lock the better fit?
The Alarm Lock DL3500DB is a Grade 1 electronic mortise lock whose deadbolt can be projected from the key cylinder outside or the turn-piece inside, and it also offers a classroom function with a 3/4 inch projection deadlocking latchbolt. Purpose-built lockdown alternatives include the BEST 45HCA heavy duty mortise lockbody with intruder function and the TownSteel FME-4000, an electronic intruder classroom mortise lockset with RFID technology at Grade 1 heavy duty on 1-3/4 inch doors. The Marks USA LA318GJ is a Grade 1 classroom security indicator mortise lockset with an ANSI strike.
14) Can I use a Schlage LE Series mobile lock in place of the Alarm Lock DL3500DB?
They are built to different ratings. The Schlage Electronics LEBMB-ADD is a Grade 2 mobile-enabled mortise lock with push button and LED, carrying a 3 hour fire rating, covering privacy, office, and apartment functions on 1-3/4 inch doors. The Alarm Lock DL3500DB is Grade 1 with a deadbolt function and a 12 button keypad for PIN entry. Within the Schlage electronic line, the LEMD-GRW is the Grade 1 ENGAGE Series wireless mortise lock with a mobile enabled deadbolt and a 3 hour fire rating, which lines up more closely on grade and deadbolt.
15) Can the deadbolt on the DL3500DB be thrown from inside without a key?
Yes. The 1 inch stainless deadbolt projects from either the key cylinder on the outside or a turn-piece on the inside, so an occupant can secure the door from within without carrying a key. The 3/4 inch deadlocking latchbolt handles normal closing; the deadbolt is the separate positive lock on top of it.
16) How many people can I give codes to on a Trilogy DL3500DB, and can I see who came through the door?
300 user codes, organized in master, manager, supervisor and basic levels so a site manager can add and delete tenants or staff without handing out the master. The lock keeps a 40,000 event audit trail with time and date stamps, and a real time clock runs up to 500 scheduled events for automatic lock and unlock windows or holidays. It is standalone, not networked, so codes and schedules are entered at the 12 button metal keypad or pushed from a Windows PC using the AL-PCI2 or AL-DTMIII transfer devices.
17) What is the difference between the DL3500DB with the deadbolt and a keypad mortise lock without one?
The deadbolt version adds a 1 inch stainless deadbolt on top of the 3/4 inch deadlocking latchbolt, giving a positive second lock for a door that gets secured overnight or holds valuables. A classroom-function version of the same lock body carries only the 3/4 inch deadlocking latchbolt. Among keypad mortise locks from other brands, the Accentra nexTouch NTM623-NR is a no-deadbolt mortise lock with cylinder override, and the Schlage CO-100 standalone keypad mortise lock is a Grade 1 privacy function unit for 1-3/4 inch doors.
18) I have Grade 1 mortise locks on my other doors already. Will the DL3500DB match the prep so I can standardize?
It should, if those openings are standard commercial mortise prep. The DL3500DB uses a 2-3/4 inch backset and T-Standard or ASA strike prep, the same prep family as Grade 1 mechanical mortise locksets such as the Corbin Russwin ML2003 classroom lock and the Cal-Royal NM8070. That lets you convert one or two doors to code access without recutting frames, and keep mechanical locks on the rest of the floor.
19) My door is 1-3/4 inch thick. Does the DL3500DB fit, or should I look at something else?
The Alarm Lock DL3500DB fits a door thickness range of 1-5/8 inch to 1-7/8 inch, so a 1-3/4 inch door falls inside that range. If a door in the same run is thicker, the Hager 3810E and 3810S Grade 1 passage mortise locks cover 1-3/4 inch to 2-1/2 inch, and the Baldwin 6301 entry/apartment mortise lock body covers 1-3/4 inch and over. Those are mechanical rather than keypad locks.
20) What is the difference between the Alarm Lock DL3500DB and a plain mortise deadbolt like the Sargent 4874?
The Sargent 4874 is a double cylinder mortise deadbolt with a 2-3/4 inch backset in the 4870 series - a deadbolt alone, keyed on both sides, with no latchbolt and no lever. The Alarm Lock DL3500DB is a full electronic mortise lock with a deadbolt function, a 12 metal button keypad, 300 user codes, and an audit trail, on the same 2-3/4 inch backset. The Kaba Ilco 185 Series is also a deadbolt function mortise lock with no handing. If the opening needs latching and coded entry rather than a deadbolt by itself, the two are not interchangeable.
21) I am standardizing a facility on Grade 1 mortise locks. Which peers match the DL3500DB grade for the non-coded openings?
The Alarm Lock DL3500DB is Grade 1, so pairing it with Grade 1 mechanical mortise locks keeps one standard across a facility. Grade 1 options by function include the Accentra 8805FL storeroom in the 8800 series, the Cal-Royal NM8080 storeroom with interchangeable core option, the Cal-Royal NM8050 office/entrance with auxiliary deadlatch, the Falcon MA101 heavy duty passage in the MA Series, and the Schlage PM010 passage latch mortise lock, non-keyed. That covers the coded exterior openings on the DL3500DB and the interior traffic doors on mechanical trim at the same rating.
22) Is there a mortise lock with a deadbolt that does not need battery changes?
The Alarm Lock DL3500DB runs on a 5AA battery-pak rated for 75,000 cycles with a low-battery alert. The Dormakaba PowerPlex P2066 Series mortise lock is the alternative to consider when battery service visits are the concern. If the coded entry is not required at all, mechanical mortise locks with a deadbolt need no power at all - the Cal-Royal NM8440 Grade 1 privacy mortise lockset with deadbolt and the Sargent 7925 Grade 1 corridor/dormitory mortise lock with single cylinder deadbolt both cover that.
23) I need a keypad lock on an exterior door in a cold climate. How does the DL3500DB compare to other electronic mortise locks?
The Alarm Lock DL3500DB is weatherproof and rated to operate from -31F to +151F (-35C to +66C), with an all metal 12 button keypad. Other electronic mortise locks worth weighing for an exterior opening are the Dormakaba E-Plex E5086, a Grade 1 back to back pushbutton and card lock, and the BEST 45HZ EZ Series keypad mortise lock with key override, which gives a mechanical way in if the credential fails. The DL3500DB also accepts a 1-3/8 inch to 1-1/2 inch mortise cylinder, with a 1-3/8 inch cylinder supplied.
24) What finish does the Alarm Lock Trilogy DL3500DB come in?
US26D satin chrome, in both left hand and right hand. That is the standard commercial dull chrome finish and it lines up with the satin stainless and 626 hardware most commercial buildings already run, so it will not stand out against existing levers and closers.
How fast can I get the Alarm Lock DL3500DBR US26D delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Alarm Lock DL3500DBR US26D come with a warranty?
Absolutely. The Alarm Lock DL3500DBR US26D is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Alarm Lock DL3500DBR US26D?
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