Alarm Lock DL3500CR Trilogy El...
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Alarm Lock Alarm Lock DL3500CR - Classroom Trilogy High Security Electronic Digital Mortise Locks ALA-DL3500CR

Alarm Lock DL3500CR Trilogy Electronic Mortise Lock Grade 1 with 300 User Codes and Classroom Function

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Model: DL3500CRR US26D
$2,425.21
$1,241.19
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$2,425.21
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Alarm Lock DL3500CR Trilogy Electronic Mortise Lock Grade 1 with 300 User Codes and Classroom Function

Professional Grade 1 Security with Advanced Electronic Access Control

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 DL3500CR Trilogy Electronic Mortise Lock delivers professional-grade security with advanced electronic access control capabilities. This Grade 1 commercial mortise lock features a 12-button metal keypad, 300 user code capacity, and classroom function operation designed for high-security institutional and commercial applications. The weatherproof construction accommodates 1-5/8" to 1-7/8" door thickness with 2-3/4" backset and operates on 5AA battery-pak for 75,000 cycles.

Professional Features & Benefits

  • Grade 1 Commercial Rating: Meets the highest ANSI/BHMA standards for durability and security in demanding commercial environments.
  • 300 User Code Capacity: Accommodates master, manager, supervisor, and basic user codes for comprehensive access hierarchy management.
  • Electronic 12-Button Metal Keypad: Provides durable tactile interface for reliable code entry in high-traffic commercial applications.
  • Classroom Function Operation: Enables specialized educational security protocols with appropriate access control for institutional environments.
  • Extended Battery Life: 5AA battery-pak provides 75,000 cycle operation with low-battery alert for reliable long-term performance.
  • Weatherproof Construction: Operates reliably in extreme temperatures for versatile installation environments across commercial facilities.
  • Flexible Installation: 2-3/4" backset accommodates 1-5/8" to 1-7/8" doors with T-Standard and ASA door strike compatibility.
  • Comprehensive Audit Trail: Built-in audit trail capability provides detailed access logging for security management and compliance.

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 electrical requirements and confirm battery-pak compatibility before proceeding with installation.
  2. Disconnect any existing power sources and follow all applicable electrical codes and safety procedures.
  3. Mount the mortise lock body in the prepared door mortise ensuring proper alignment with door thickness range of 1-5/8" to 1-7/8".
  4. Install the electronic keypad assembly and connect internal wiring according to manufacturer wiring diagrams using appropriate connections.
  5. Configure user codes, access hierarchy levels, and classroom function settings per application requirements and institutional security protocols.
  6. Install 5AA battery-pak and test all functions including normal operation, audit trail logging, and low-battery alert systems.
  7. Complete final inspection and document user code assignments and operational settings. Refer to manufacturer documentation for complete programming instructions and troubleshooting.

Professional Applications

  • Educational Institutions and Classroom Security
  • Commercial Office Buildings
  • Healthcare Facilities
  • Government Buildings
  • Multi-Tenant Properties
  • Professional Services Offices
  • Retail and Hospitality Establishments

Why Choose Alarm Lock Quality?

Alarm Lock delivers proven reliability with Grade 1 commercial construction, weatherproof operation, and comprehensive audit trail capabilities. The 75,000-cycle battery life and electronic keypad interface ensure long-term performance and security in demanding commercial access control applications where dependable electronic access management 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:
Classroom
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 DL3500CRR US26D – Frequently Asked Questions

1) Do I have to order the DL3500CR handed, or can I flip it on site?
Handing is specified on the order, right hand or left hand, and the Trilogy mortise lock is reversible in the field if you get to the door and the swing is not what the drawing said. Each handing is offered in oil rubbed bronze (US10B) and satin chrome (US26D).
2) Will the DL3500CR latch into the strike that's already in my frame?
The classroom function runs a stainless steel latchbolt with a 3/4 inch projection and a deadlocking latch, and a 1-1/4 x 4-7/8 inch strike ships with the lock. It is prepped for T-Standard and ASA strikes, so if your existing frame carries a standard ASA lip strike at a 2-3/4 inch backset you are working with the same prep. Frames cut for a non-standard strike will need the supplied strike installed.
3) What cylinder does the Alarm Lock DL3500CR take, and can I key it into my existing master key system?
A 1-3/8 inch mortise cylinder comes with the lock, and the body 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 an existing system. Keying is chosen at order time: keyed different, keyed alike, or to a key code you supply.
4) What does classroom function mean on an electronic mortise lock like the DL3500CR?
Classroom function here means the outside lever is controlled by PIN entry at the keypad and the inside lever always allows free egress. The latchbolt is stainless with a 3/4 inch projection and a deadlocking latch. Alarm Lock also builds the DL3500 body in a deadbolt version, where a 1 inch stainless deadbolt is thrown either from the outside key cylinder or an inside turn-piece, on top of the same 3/4 inch latchbolt. If your school wants a bolt someone can throw from inside the room, the deadbolt variant is the one to spec, not the CR.
5) Is the Alarm Lock DL3500CR keypad lock fire rated for a labeled classroom door?
The Steelcase lock body meets BHMA specifications for Grade 1 locks and is UL Listed to the 10C Positive Pressure Specification, and the levers are ADA compliant. That covers the labeled corridor and classroom openings most schools and healthcare facilities are specifying to.
6) Do I need to run wire or a power supply to install a Trilogy DL3500CR?
No wiring at all. The DL3500CR is standalone and runs on a 5AA battery-pak rated for 75,000 cycles, with a low-battery alert, and every function is programmed at the 12-button metal keypad rather than through software or a network. That is the practical difference from a wired mortise lock such as the BEST 45HW, which runs on 12V or 24V and needs power brought to the frame, or the Schlage 03A electric mortise lock with request-to-exit at 12/24VDC. If you are retrofitting an existing door with no power in the frame, the battery lock avoids the door loop and the transfer hinge.
7) Can I swap a Trilogy DL3500CR into a door that already has a standard mortise lock in it?
If the existing lock is a standard commercial mortise at 2-3/4 inch backset with an ASA strike, the pocket and backset line up, since that is what the DL3500CR is cut for. Two things to check on the door itself: thickness has to fall between 1-5/8 and 1-7/8 inches, and the keypad escutcheon needs through-bolt holes prepped, which a knob or rose-trim lock will not have left behind. Doors under 1-5/8 inches are out regardless of the mortise pocket.
8) What is the closest equivalent to the Alarm Lock DL3500CR if the door needs a keypad mortise lock from a different manufacturer?
The DL3500CR is a Grade 1 mortise lock with a 12-button metal keypad and 300 user codes. The closest keypad-driven mortise peers are the BEST 45HZ EZ Series electronic keypad mortise lock with key override function, the Dormakaba E-Plex 2066 Series electronic pushbutton keyless mortise lock, and the Schlage CO-100 standalone electronic mortise lock with a keypad reader in Grade 1. All four put code entry directly on the lock rather than on a separate reader, so the door needs no wiring run for any of them.
9) Which mortise lock gives classroom function without any electronics or batteries?
For a purely mechanical classroom mortise lock, the Cal-Royal NM8070 is a heavy duty Grade 1 classroom mortise lockset with auxiliary deadlatch for 1-3/4 inch doors, and the Corbin Russwin ML2003 is a Grade 1 classroom mortise lockset in the ML2000 Series, also listed for 1-3/4 inch doors. Both are keyed classroom locks with no code programming and no battery to change, unlike the DL3500CR, which runs on a 5AA battery-pak rated for 75,000 cycles.
10) What should be used instead of the DL3500CR on a classroom door that needs credentials or cards rather than PIN codes?
The DL3500CR reads PIN codes entered on a keypad. Where the facility issues cards or fobs instead, the TownSteel FME-2000 Series is a Grade 1 heavy duty classroom mortise lockset with RFID technology for 1-3/4 inch doors, 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 mortise lock is Grade 1 with a capacitive touchscreen keypad and cylinder override, no deadbolt.
11) The DL3500CR is standalone. What mortise lock should be specified when the opening has to tie into an access control panel?
The DL3500CR programs entirely through its own keypad and runs on batteries at the door. When the opening must be controlled from a panel, the wired peers are the BEST 45HW Series wired electromechanical mortise lock with 12V/24V operation, the Command Access ML190 Series motorized mortise lock with field selectable EL/EU operation and 24VDC power in storeroom function, and the Schlage L9092EU 03A electric lock/unlock outside lever mortise lock, keyed outside with request to exit and 12/24VDC. For wireless panel integration, the Schlage LEMD-GRW is a Grade 1 ENGAGE Series wireless mortise lock with a 125kHz proximity reader.
12) How many people can I give codes to on a Trilogy DL3500CR, and can I see who opened the door?
Up to 300 user codes, arranged as master, manager, supervisor and basic users so a head custodian and a front office can hold different levels of authority. The lock keeps a built-in audit trail, so an access history is readable off the lock itself without any network or head-end. Codes and schedules are all entered at the keypad.
13) Can I use the DL3500CR keypad lock on an exterior door?
Yes, it is built weatherproof and rated to operate in extreme temperatures, so exterior gym entries, side doors and outbuildings are in scope as long as the door is 1-5/8 to 1-7/8 inches thick and mortise prepped. Being battery powered, it does not need a power run out to a remote exterior opening.
14) Should I put in a keypad lock like the Trilogy DL3500CR or a card reader mortise lock?
PIN entry suits a building with no credential program running. Nobody carries anything, codes go in at the keypad, and there are no cards to issue or replace across 300 users. If your facility already issues badges, a credential lock fits the existing program better: the TownSteel FME-2000 is a Grade 1 classroom mortise lockset with RFID, the FME-4000 adds an intruder classroom function with RFID, and the Dormakaba Saffire LX-I-M002 is an RFID mortise lockset with Bluetooth mobile access. The Dormakaba E-Plex E5086 combines pushbutton and card in one Grade 1 mortise lock if you want both.
15) I need a Grade 1 classroom mortise lock but I don't want electronics. What are my options?
For a straight mechanical classroom mortise lock, the Cal-Royal NM8070 is a heavy duty Grade 1 classroom lockset with auxiliary deadlatch for 1-3/4 inch doors, and the Corbin Russwin ML2003 from the ML2000 Series is a Grade 1 classroom mortise lockset, also 1-3/4 inch. The Marks USA LA318GJ is a Grade 1 classroom security indicator mortise lockset with an ANSI strike and a steel escutcheon, for 1-3/4 inch doors, if you want a visual indicator of the locked state on the door. Those key by cylinder only, so you lose the 300 codes and the audit trail the Trilogy gives you.
16) Is a Sargent 4874 mortise deadbolt a substitute for the DL3500CR in deadbolt function?
No. The Sargent 4874 is a double cylinder mortise deadbolt with a 2-3/4 inch backset in the 4870 Series - a deadbolt only, with no latchbolt and no lever. The DL3500CR carries a stainless steel latchbolt with 3/4 inch projection and deadlocking latch, and in deadbolt function adds a 1 inch stainless steel deadbolt alongside that latch, with keypad code entry. The two share a 2-3/4 inch backset, but the 4874 will not latch the door on its own or hold codes.
17) Is there a keypad mortise lock that does not need batteries replaced like the DL3500CR does?
The DL3500CR runs on a 5AA battery-pak rated for 75,000 cycles with a low-battery alert. The Dormakaba PowerPlex P2066 Series mortise lock in the PowerPlex 2000 Series is the peer built around not carrying a battery pack at the door. The Codelocks CL2255 electronic tubular mortise latch in the CL2000 Series is another code-entry option, though it is rated medium duty rather than the DL3500CR's Grade 1 and is a latch rather than a full mortise lockset with deadbolt option.
18) The DL3500CR fits 1-5/8 inch to 1-7/8 inch doors. What mortise locks are specified for thicker doors?
The DL3500CR's door thickness range is 1-5/8 inch to 1-7/8 inch. For doors above that, the Hager 3810E and 3810S 3800 Series Grade 1 passage mortise locks with 2-3/4 inch backset are listed for 1-3/4 inch to 2-1/2 inch doors, and the Baldwin 6301 entry/apartment mortise lock body on a 2-1/2 inch backset is listed for 1-3/4 inch and over. Those are keyed or passage mechanical bodies, not code-entry locks.
19) If the opening needs storeroom rather than classroom function, what mortise lock replaces the DL3500CR?
The DL3500CR is a classroom function lock. For storeroom function on a mortise prep, the Accentra 8805FL is a Grade 1 storeroom mortise lock with an Arcadia lever in the 8800 Series, and the Cal-Royal NM8080 is a heavy duty Grade 1 storeroom mortise lockset with an interchangeable core option for 1-3/4 inch doors. Both are keyed mechanical locks, so access is managed by keys rather than by the code hierarchy the DL3500CR programs through its keypad.
20) What finishes does the Alarm Lock DL3500CR Trilogy mortise lock come in?
Two finishes: US26D satin chrome and US10B oil rubbed bronze, each available right hand or left hand. Satin chrome is the usual match for institutional openings already carrying 626 hardware; oil rubbed bronze suits hospitality and multi-family where the rest of the trim is dark.
21) How often will I be changing batteries in a Trilogy DL3500 mortise lock?
The 5AA battery-pak is rated for 75,000 cycles and alkaline cells are included with the lock. A low-battery alert warns before the pack is exhausted, so a maintenance crew is not guessing at a replacement interval across a building of doors. Batteries drop straight in at the door with no special tooling or programming loss.
22) Can a Sargent 130KB thumbturn or a Schlage L0170 half dummy trim be ordered in place of the DL3500CR?
No. The Sargent 130KB is a standard duty mortise thumbturn in the 8200 Series and the Schlage L0170 is a Grade 1 half dummy trim, non-keyed, in the L Series for 1-3/4 inch doors. Both are trim pieces that mount to an opening; neither contains a latchbolt or any locking mechanism. The DL3500CR is a complete Grade 1 mortise lock with keypad, lock body, latchbolt and a 1-1/4 inch by 4-7/8 inch strike included.
23) Which mortise lock should be used on a dormitory or corridor door instead of a classroom lock?
The Sargent 7925 is a Grade 1 heavy duty dormitory exit function mortise lock in the 7900 Series with rose trim and a single cylinder deadbolt, listed for corridor/dormitory function. It gives the deadbolt-plus-latch arrangement the DL3500CR offers in its deadbolt function, but as a keyed mechanical lock without code entry or audit trail. The DL3500CR carries audit trail logging and 300 user codes on its keypad.
24) What electronic mortise lock covers privacy function for a restroom or single-occupancy room?
The DL3500CR is built for classroom function. Where the room needs privacy instead, the Schlage CO-100 standalone electronic mortise lock is Grade 1 heavy duty in privacy function with a keypad reader for 1-3/4 inch doors, and the Schlage LE Series LEBMB-ADD is a Grade 2 mobile-enabled mortise lock with push button and LED covering privacy, office and apartment functions with a 3 hour fire rating. Mechanically, the Cal-Royal NM8440 is a heavy duty Grade 1 privacy mortise lockset with deadbolt for 1-3/4 inch doors.
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Does the Alarm Lock DL3500CRR US26D come with a warranty?
Absolutely. The Alarm Lock DL3500CRR US26D is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
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