Add electric access control and advanced lock/door monitoring to a commercial opening with the ACSI ACL9080EU/EL-LMDPS Electrified Mortise Lock Body.

Built around the Schlage L9080 mortise-lock platform, this configuration combines field-selectable Fail Safe / Fail Secure electrification with two important monitoring functions:

• LM – Latch Bolt Monitor

• DPS – Door Position Sensor

The result allows an access-control system to monitor both whether the main latchbolt is fully extended and whether the door itself is open or closed.

The lock supports 12VAC, 12VDC, 24VAC, or 24VDC operation and is designed for commercial access-control and life-safety applications.

Key Features

• Genuine ACSI – Architectural Control Systems

• Model ACL9080EU/EL-LMDPS

• Based on the Schlage L9080 mortise-lock platform

• Electrified commercial mortise lock body

• Field-selectable electrical operation

• EU – Fail Secure / Power Unlock

• EL – Fail Safe / Power Lock

• LM – Latch Bolt Monitor

• DPS – Door Position Sensor

• Monitors full extension of the main latchbolt

• Monitors whether the door is open or closed

• 12VAC

• 12VDC

• 24VAC

• 24VDC

• Continuous-duty rated

• Low power consumption

• Electrically controlled outside trim

• Mechanical egress from inside in applicable configuration

• Key override capability with compatible cylinder

• Interfaces with access-control systems

• Interfaces with compatible life-safety systems

• UL Listed Series 1500 platform

• Lock body only – trim and cylinder sold separately

LM – Latch Bolt Monitor

The LM option provides a dedicated:

Latch Bolt Monitor

The switch monitors the:

Full Extension of the Main Latchbolt

This allows the access-control or security system to verify that the latchbolt has extended into its normal latched position.

LM Monitoring Can Help Determine

• Latch fully extended

• Latch not fully extended

• Door hardware not properly latched

• Possible door or strike alignment problems

• Door closed but latch not completely engaged

This provides information that a standard door-position switch alone cannot provide.

DPS – Door Position Sensor

The DPS option monitors the actual position of the door.

ACSI incorporates a:

Magnetic Sensor in the Mortise Lock

that reacts to a:

Magnet Mounted Behind the ASA Strike

When the door reaches the closed position, the magnet and sensor align and provide the appropriate monitoring signal.

DPS Can Monitor

• Door open

• Door closed

• Door held open

• Door failing to return to the closed position

The access-control panel determines how these status changes are interpreted and reported.

LM + DPS Dual Monitoring

Combining Latch Bolt Monitoring and Door Position Monitoring gives the access-control system more detailed information about the opening.

A DPS alone can indicate that the door has returned to the frame.

The LM adds verification that the:

Main Latchbolt Has Fully Extended

Together, the system can better determine whether the opening is actually closed and properly latched.

Example – Door Closed and Secure

DPS = Door Closed

and

LM = Latchbolt Fully Extended

This indicates that the door has returned to the frame and the main latch has extended.

Example – Door Closed but Not Properly Latched

DPS = Door Closed

but

LM = Latchbolt Not Fully Extended

This may indicate:

• Door misalignment

• Binding hardware

• Strike alignment problems

• Latch obstruction

• Door not completely seated in the frame

This makes the LMDPS configuration useful for openings where positive latch verification is important.

Field-Selectable Fail Safe / Fail Secure

The ACL9080EU/EL-LMDPS provides selectable electrical locking operation.

EU – Fail Secure / Power Unlock

In the Fail Secure configuration:

Power Applied = Outside Trim Unlocked

Power Removed = Outside Trim Locked

If electrical power is lost, the exterior side remains secured.

This is commonly used where maintaining security during a power failure is required.

EL – Fail Safe / Power Lock

In the Fail Safe configuration:

Power Applied = Outside Trim Locked

Power Removed = Outside Trim Unlocked

If electrical power is lost, the exterior side becomes unlocked.

Fail-safe operation may be required for specific life-safety or emergency-release applications.

Fail Mode Selection

Fail-safe versus fail-secure operation should be selected according to:

• Building code requirements

• Fire code requirements

• Security requirements

• Life-safety requirements

• Fire-alarm sequence

• Access-control design

• Authority Having Jurisdiction requirements

Electrified L9080-Style Function

The ACL9080EU/EL-LMDPS is based on the Schlage L9080-style electrified mortise-lock function.

Typical operation includes:

Outside Lever

Electrically locked or unlocked according to the selected EU/EL function.

Inside Lever

Provides mechanical egress according to the lock configuration.

Main Latchbolt

Monitored by the LM switch to verify full extension.

Door Position

Monitored by the DPS magnetic sensor.

Key Cylinder

A compatible mortise cylinder can provide mechanical override when required.

Mechanical Key Override

When equipped with the appropriate mortise cylinder, the latchbolt may be momentarily retracted mechanically by key even when the outside trim is electrically locked.

The lock then returns to its normal electrical control condition after mechanical key operation.

12 / 24 VAC or DC Operation

The ACSI Series 1500 platform supports:

• 12VAC

• 12VDC

• 24VAC

• 24VDC

This allows the lock to integrate with a wide variety of commercial access-control power systems.

Before installation, verify:

• System voltage

• AC or DC operation

• Power-supply capacity

• Wire gauge

• Wire distance

• Power-transfer capacity

• Relay ratings

Continuous-Duty Operation

The electrified lock platform is:

Continuous-Duty Rated

This allows the electrical locking function to remain energized for extended periods when properly powered.

Typical applications include:

• Scheduled access

• Business-hours unlocking

• Controlled office entrances

• Stairwell doors

• Secure rooms

• Institutional access control

Access-Control Integration

The ACL9080EU/EL-LMDPS can interface with compatible:

• Access-control panels

• Card readers

• Keypads

• Mobile credential systems

• Time schedules

• Building management systems

• Security-management systems

• Remote release switches

• Fire-alarm interfaces

Advanced Door Status Monitoring

The combination of LM and DPS can provide useful information to the access-control system.

Depending on system programming, the controller may distinguish between:

• Door open

• Door closed

• Door properly latched

• Door closed but latch not extended

• Door held open

• Door failing to secure

This can improve troubleshooting and security reporting on monitored openings.

LM vs. RX

The LM option should not be confused with RX / Authorized Egress monitoring.

LM

Latch Bolt Monitor

Monitors whether the main latchbolt is fully extended.

RX / AE

Request to Exit / Authorized Egress

Monitors operation of the inside trim.

Therefore:

ACL9080EU/EL-RX monitors egress activity.

ACL9080EU/EL-LMDPS monitors latchbolt extension and door position.

DPS Installation

The DPS system uses:

• Magnetic sensor incorporated into the mortise lock

• Magnet located behind the compatible ASA strike

Correct magnet-to-sensor alignment is important for reliable monitoring.

ASA Strike Requirement

Because the DPS magnet is positioned at the strike location, verify:

• Strike type

• Frame preparation

• Strike alignment

• Door/frame clearances

before installation.

Life-Safety Integration

ACSI Series 1500 electrified mortise locks are designed to interface with compatible life-safety systems.

Depending on the opening, the system may be integrated with:

• Fire alarm controls

• Emergency release circuits

• Stairwell unlocking

• Security systems

• Building access-control systems

The required operating sequence depends on the selected electrical function and applicable code requirements.

Fire-Rated Applications

For a fire-rated opening, verify the complete assembly including:

• Door

• Frame

• Mortise lock

• Lever trim

• Cylinder

• Electrification

• Strike

• LM monitoring

• DPS monitoring

• Wiring

• Power supply

• Access-control system

The complete opening must maintain the required fire-door listing.

Common Applications

Ideal for:

• Server rooms

• Data centers

• Hospitals

• Healthcare facilities

• Schools

• Universities

• Government facilities

• Secure offices

• Controlled laboratories

• Pharmaceutical storage

• Employee-only areas

• Institutional facilities

• Stairwell openings

• High-security commercial doors

• Doors requiring latch-status verification

• Access-controlled openings requiring door-position monitoring

Product Specifications

Brand: ACSI
Manufacturer: Architectural Control Systems, Inc.
Model: ACL9080EU/EL-LMDPS
Series: 1500 Electric Lock
Product Type: Electrified Mortise Lock Body
Platform: Schlage L9080-Type Mortise Lock
Electrical Function: Field Selectable Fail Safe / Fail Secure
EU: Fail Secure / Power Unlock
EL: Fail Safe / Power Lock
LM: Latch Bolt Monitor
LM Function: Monitors Full Extension of Main Latch
DPS: Door Position Sensor
DPS Function: Monitors Door Open / Closed Position
Voltage: 12/24VAC/DC
Duty Rating: Continuous
Outside Trim: Electrically Controlled
Inside Egress: Mechanical in Applicable Configuration
Key Override: With Compatible Cylinder
Lock Body: Included
Lever Trim: Not Included
Cylinder: Not Included

Monitoring Functions

LM – Latch Bolt Monitor

Monitors:

Full extension of the main latchbolt

DPS – Door Position Sensor

Monitors:

Door position through a magnetic sensor in the mortise lock and magnet behind the ASA strike

What's Included

Typical ACL9080EU/EL-LMDPS configuration includes:

• ACSI-modified L9080 electrified mortise lock body

• EU/EL electrical control

• LM Latch Bolt Monitor

• DPS Door Position Sensor

• DPS magnetic strike component as applicable

• Electrical connector and internal wiring

• Required internal monitoring components

Exact factory packaging may vary.

Not Included

Unless specifically stated:

• Exterior lever trim

• Interior lever trim

• Rose

• Escutcheon

• Mortise cylinder

• Interchangeable core

• Keys

• Access-control reader

• Keypad

• Power supply

• Power transfer

• Access-control panel

• Door

• Frame

• Installation labor

Important Ordering Information

Before ordering, verify:

• Model ACL9080EU/EL-LMDPS

• Fail-safe or fail-secure requirement

• LM latch-monitoring requirement

• DPS door-position monitoring requirement

• Supply voltage

• AC or DC operation

• Door thickness

• Backset

• Lever trim

• Rose or escutcheon

• Cylinder format

• Finish

• ASA strike preparation

• DPS magnet installation

• Power-transfer requirement

• Fire-rating requirement

• Access-control inputs available

Monitoring Model Comparison

ACL9080EU/EL
Electrified lock body – no added LM/DPS monitoring

ACL9080EU/EL-RX
Electrified lock body + Request-to-Exit monitoring

ACL9080EU/EL-RXDPS
Electrified lock body + Request-to-Exit + Door Position Sensor

ACL9080EU/EL-LMDPS
Electrified lock body + Latch Bolt Monitor + Door Position Sensor