Altronix T1MK1F4DQ 4-Door PTC Power Distribution Module for Mercury LINQ

Overview

The Altronix T1MK1F4DQ is a mountable, 4-door power distribution module engineered specifically for Mercury LINQ-based access control systems. Where generic power supplies leave integrators managing individual fuses and tracing faults manually, the T1MK1F4DQ uses Positive Temperature Coefficient (PTC) resettable over-current protection on each output — one protected output per door, four doors total. That means a shorted lock or reader on Door 3 doesn't take down Doors 1, 2, and 4, and you don't need to stock fuses or pull a panel to restore power after a fault clears. For enterprise access control builds running Mercury hardware, this is purpose-built infrastructure, not an afterthought.

Key Features

• 4-Door Coverage with Per-Output PTC Protection: Each of the four outputs carries independent PTC over-current protection. A fault on one door circuit self-limits and auto-resets once the load is removed — no manual fuse replacement, no service call to restore a tripped circuit. In multi-door installations this is the difference between a one-door incident and a wing-wide outage.
• Mercury LINQ Compatibility: The T1MK1F4DQ is designed to integrate directly with Altronix Mercury LINQ access control architectures. LINQ-based systems distribute intelligence and power over a shared bus, and this module slots into that topology cleanly — no external adapters, no compatibility guesswork.
• Mountable Form Factor: The panel-mountable design keeps power distribution consolidated inside the same enclosure as the access control hardware. Cleaner wire runs, easier inspection during audits, and faster troubleshooting since everything is in one location.
• UL and cUL Listed: Both UL and cUL certifications mean the T1MK1F4DQ meets North American safety standards — relevant for any installation where the AHJ (Authority Having Jurisdiction) reviews the hardware list, which is most commercial and institutional projects. Specifying UL-listed components is often a contract requirement in government, healthcare, and education builds.
• PTC Over-Current Output Protection: Unlike thermal fuses or glass fuses that fail permanently, PTC devices are resettable. When a circuit overloads, resistance spikes and current is limited; once the fault is resolved, the PTC resets automatically. This dramatically reduces service visits for nuisance trips and extends the operational life of the protection mechanism itself.
• Purpose-Built for Access Control Power Distribution: General-purpose power supplies don't differentiate outputs per door. The T1MK1F4DQ is architected for access control power distribution specifically — four discrete protected circuits mapped to four physical doors, which simplifies both the initial wiring design and ongoing fault isolation.

Integration & Compatibility

The T1MK1F4DQ is built for Mercury LINQ access control platforms. Mercury-based panels are widely deployed in enterprise and institutional environments and supported by major access control software platforms — integrators running Mercury-compatible systems will find the T1MK1F4DQ slots into their standard panel build. Confirm your Mercury panel model supports LINQ topology before specifying this module; it is not a universal-fit power supply for non-LINQ Mercury hardware or third-party controllers.

The mountable form factor is compatible with standard access control enclosures used in multi-door panel assemblies. Verify enclosure depth and backplane dimensions against your enclosure spec before ordering — the T1MK1F4DQ is designed for panel mounting, but exact fit depends on the enclosure model selected for your installation.

For larger deployments requiring centralized power management and monitoring across many doors, pair this module with compatible Altronix power management hardware. The UL/cUL listing on the T1MK1F4DQ also simplifies compliance documentation for system-level UL listings, particularly relevant on UL 2050 or similar monitored system specs.

Frequently Asked Questions

Q: Is the T1MK1F4DQ compatible with all Mercury access control panels?

A: The T1MK1F4DQ is designed for Mercury LINQ-based systems specifically. It is not a universal fit for all Mercury hardware — confirm your panel supports the LINQ topology before specifying this module.

Q: Does the T1MK1F4DQ require manual fuse replacement after a fault?

A: No. The T1MK1F4DQ uses PTC (Positive Temperature Coefficient) resettable protection on each output. Once the fault condition is cleared, the PTC resets automatically — no fuse replacement required.

Q: How many door circuits does the T1MK1F4DQ support?

A: The T1MK1F4DQ supports 4 independently protected door circuits, each with its own PTC over-current protection.

Q: Is the T1MK1F4DQ UL listed?

A: Yes. The T1MK1F4DQ carries both UL and cUL listings, meeting North American safety standards applicable to commercial and institutional access control installations.

Q: Can the T1MK1F4DQ be panel-mounted inside a standard access control enclosure?

A: Yes, the T1MK1F4DQ is designed for panel mounting. Verify your enclosure's available depth and backplane dimensions against the module's physical footprint before installation.

Q: What happens if one door circuit faults — do the other three doors lose power?

A: No. Each of the four outputs has independent PTC protection, so a fault on one circuit is isolated and does not affect the remaining three door circuits.

Jerry Tildsen

The T1MK1F4DQ addresses one of the most common pain points in multi-door Mercury LINQ builds: power fault isolation. With four independently PTC-protected outputs, a shorted mag-lock or reader on any single door self-limits without pulling down adjacent circuits — that's operationally significant in occupied buildings where a wing-wide access failure triggers a security response.

Technical Highlights:

• PTC Per-Output Protection: Resettable over-current protection on each of the 4 outputs auto-resets when the fault clears — eliminates fuse stock requirements and reduces truck rolls for nuisance trips.
• Mercury LINQ Architecture Fit: Designed specifically for LINQ topology, meaning the module integrates into the distributed power-and-intelligence bus without the adapter layers or signal translation that generic power supplies require.
• UL and cUL Listing: Dual safety listings satisfy AHJ requirements on commercial, healthcare, and government projects where unlisted power components can fail a system-level inspection.

Deployment Considerations:

• Confirm LINQ topology support on the specific Mercury panel revision in your BOM — not all Mercury hardware generations implement LINQ identically, and this module is not rated for non-LINQ configurations.
• PTC protection is self-resetting, but sustained or recurring faults on a circuit indicate a wiring or hardware problem that won't resolve on its own — use the isolation benefit to diagnose, not to defer the repair.

The T1MK1F4DQ is the right specification for a 4-door Mercury LINQ panel in a commercial office, education, or healthcare environment where maintenance access is limited and fault isolation between door circuits is operationally non-negotiable.