LOX EM3500DM Monitored Double Electromagnetic Lock – 280kg Per Leaf (560kg Total), Dual Voltage, Fire Rated
Overview
The LOX EM3500DM is a premium slimline double-door electromagnetic lock built for high-security commercial and industrial access control across Australia. Delivering 280kg (600 lb) of holding force per door leaf — 560kg total — and featuring an integrated Hall Effect Lock Status Sensor (LSS) and Reed Switch Door Status Sensor (DSS), the EM3500DM provides complete real-time visibility over both lock engagement and door position. With a 4-hour fire rating, lifetime warranty, and dual 12V/24VDC compatibility, it is the industry-standard monitored double maglock for Australian security installations.
Description
Where a single maglock secures one door leaf, the EM3500DM secures both — in a single, slimline 476mm body that mounts cleanly across the top of a double door frame. The dual monitoring system sets it apart from the non-monitored EM3500D: the Hall Effect LSS confirms the lock is properly engaged, while the reed switch DSS detects whether each door leaf is physically closed. Together, they give your access control panel the full picture — essential for alarm integration, audit trails, and compliance-driven environments.
The anti-tamper mounting plate conceals all fixings once installed, deterring forced entry attempts, while zero residual magnetism ensures instant door release the moment power is cut — critical for safe egress in fire or emergency situations. Built-in MOV surge protection guards the internal circuitry against voltage spikes, and the high-visibility red/green LED panel gives security staff and installers immediate visual confirmation of lock status. Tested to over 1,000,000 cycles and backed by a lifetime warranty, the EM3500DM is built for the long haul.
Key Features
280kg Holding Force Per Leaf (560kg Total): Industry-standard double door holding force — tested to over 1,000,000 cycles for maintenance-free commercial reliability.
Dual Monitoring – Hall Effect LSS & Reed Switch DSS: Real-time lock status and door position feedback to your access control panel — essential for alarm integration and audit trail compliance.
4-Hour Fire Rating: Certified to Australian Standards (AS) for use on fire-rated double door assemblies.
Fail-Safe Operation: Releases instantly when power is removed — correct configuration for commercial and fire-rated door applications.
Zero Residual Magnetism: Innovative coil design ensures immediate door release on power loss, critical for safe emergency egress.
Anti-Tamper Mounting Plate: Conceals all fixings once installed, deterring unauthorised removal and forced entry attempts.
Red/Green LED Indicator: High-visibility panel provides instant visual confirmation of locked or unlocked status.
Dual Voltage – 12VDC / 24VDC: Compatible with the vast majority of access control power supplies and panels used in Australian installations.
Built-In MOV Surge Protection: Guards internal circuitry against voltage spikes — extends product life in variable power environments.
Lifetime Warranty: Manufacturer’s lifetime warranty for long-term peace of mind.
Use Cases
Commercial office building double door entry and exit points
Government buildings and council facilities
Retail shopfronts with double inward or outward-swing doors
Schools, universities, and TAFE campuses
Hospitals and healthcare facility controlled entry points
Data centres and server room double door access
Strata and apartment building common area double doors
Industrial facilities requiring high-security double door access control
Technical Specifications
Specification
Detail
Model
LOX EM3500DM (Monitored)
Holding Force
280kg (600 lb) per leaf | 560kg total
Operating Voltage
12VDC / 24VDC (Dual Voltage)
Current Draw
530mA @ 12VDC | 260mA @ 24VDC (per lock body ×2)
Monitoring
Hall Effect LSS (Lock Status) & Reed Switch DSS (Door Status)
Lock Type
Double Electromagnetic (Fail-Safe)
Dimensions (Lock Body)
476mm (L) × 48mm (H) × 26mm (D)
Operating Temperature
-20°C to +60°C
Fire Rating
Up to 4 Hours (AS Certified)
LED Indicator
Red/Green High-Visibility Panel
Surge Protection
MOV Varistor (Built-In)
Residual Magnetism
None (Instant Release)
Cycle Rating
1,000,000+ cycles
Warranty
Lifetime (Manufacturer)
Certifications
CE, C-Tick, 4-Hour Fire Rated
Recommended Accessories & Compatible Products
LOX AMZB4D-LP Double L & Z Bracket – Required for inward-opening double door installations; ensures correct armature plate alignment for full holding force.
LOX AMZB4D-BLK Double L & Z Bracket (Matte Black) – Matching black bracket for the EM3500DM-BLK black series variant.
LOX AMLB4 Adjustable L-Bracket – For outward-opening double door configurations where a direct frame mount is not possible.
Access Control Power Supply (12VDC / 24VDC) – Regulated power supply with battery backup to maintain lock operation during power outages.
Exit Button / Request-to-Exit (RTE) – Surface-mount or flush egress buttons for compliant door release on double door installations.
Door Controller / Access Panel – Single or multi-door panels compatible with the EM3500DM’s LSS and DSS monitoring outputs for full system integration.
Door Closer – Overhead door closer to ensure both door leaves return to the locked position; required for fire door compliance in Australia.
LOX EM3500D – Non-monitored version of this lock; suitable where LSS/DSS monitoring is not required.
Frequently Asked Questions
What is the difference between the EM3500D and the EM3500DM?The EM3500D is the non-monitored version — it locks and unlocks but provides no status feedback. The EM3500DM adds dual monitoring via Hall Effect LSS (lock status) and reed switch DSS (door status), an anti-tamper mounting plate, and is the correct choice for access control systems requiring real-time feedback, alarm integration, or audit trail compliance.
Is the EM3500DM fail-safe or fail-secure?The EM3500DM is a fail-safe electromagnetic lock — it releases (unlocks) when power is removed. This is the standard and required configuration for most commercial and fire-rated double door applications in Australia.
What brackets do I need for the EM3500DM?The correct bracket depends on your door swing direction. For inward-opening double doors, use the LOX AMZB4D-LP (or AMZB4D-BLK for black finish). For outward-opening double doors, the LOX AMLB4 adjustable L-bracket is the correct choice. Using the wrong bracket will result in misalignment and reduced holding force.
Is the EM3500DM suitable for outdoor use?The EM3500DM is designed for indoor use or weather-protected environments. For fully exposed outdoor installations, an IP-rated electromagnetic lock is recommended. Contact us for guidance on outdoor-rated options.
What voltage does the EM3500DM operate on?The EM3500DM supports both 12VDC and 24VDC operation, making it compatible with the vast majority of access control power supplies used in Australian installations.
Is the EM3500DM suitable for fire-rated double doors?Yes. The EM3500DM is certified to Australian Standards (AS) for use on fire-rated door assemblies for up to 4 hours, meeting Australian building code requirements for fire-rated access control hardware.
Do you ship Australia-wide?Yes. We ship to all states and territories including NSW, VIC, QLD, WA, SA, TAS, ACT, and NT. Contact us for bulk order pricing and project quotes.
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