Altronix T14DRSTD Dual PTC Class 2 Power Supply for TRL Systems

Overview

The Altronix T14DRSTD is a compact power supply designed specifically for TRL (Timed Relay Locking) systems, delivering 12VDC or 24VDC at up to 1.75A across two independently protected Class 2 outputs. If you're wiring electric strikes, magnetic locks, or access-controlled door hardware in a commercial or institutional environment, this unit handles the power conversion and circuit protection in one purpose-built package — no add-on fuse boards required.

The T14DRSTD accepts standard 115VAC from any commercial branch circuit and steps it down to your choice of 12 or 24VDC field-selectable output, making it straightforward to match the voltage requirement of whatever locking hardware you're deploying. It's part of the broader Altronix power and access control line, which has long been a default choice for integrators specifying lock power in the physical security channel.

Key Features

• Dual PTC Class 2 Outputs: Two Positive Temperature Coefficient (PTC) protected outputs mean there's no fuse to replace when a wiring fault trips a circuit. The PTC resets automatically once the fault clears — a real operational advantage in multi-door installations where a tripped fuse on a Friday afternoon would otherwise mean a service call. Class 2 rating limits output power per NEC Article 725, which simplifies wiring inspections and code compliance on commercial projects.
• 12/24VDC Selectable Output: Field-selectable output voltage means a single SKU covers both 12V and 24V locking hardware. If your hardware mix changes mid-project — or if you're stocking a van for multiple sites — you're not carrying two different power supplies. Set the voltage at the unit before installation.
• 1.75A Output Current: At 1.75A, this unit can drive a typical magnetic lock (which draws 500–600mA at 12V) with comfortable headroom, or handle a pair of lower-draw electric strikes simultaneously. Verify your total lock draw before paralleling loads across both outputs — the 1.75A ceiling is shared across the unit.
• 115VAC Input: Standard North American commercial single-phase input, compatible with any 15A or 20A branch circuit. No special transformer or step-down required. Wires directly to a standard junction box on the same circuit as your access control panel.
• Purpose-Built for TRL Systems: The T14DRSTD is specifically configured for use with Altronix TRL (Timed Relay Locking) systems, where door hardware power must be coordinated with relay timing sequences. Using a matched power supply simplifies integration with TRL modules and ensures voltage and current delivery aligns with what the relay timing board expects.
• Compact Form Factor: Designed to mount inside standard Altronix enclosures or alongside TRL module boards, keeping the installation footprint minimal at the door or in the IDF closet. Reduces wiring runs when the power supply lives close to the hardware it feeds.

Integration & Compatibility

The T14DRSTD is explicitly designed for use with Altronix TRL access control systems and pairs naturally with Altronix timing and relay modules in the same product family. The dual Class 2 outputs are compatible with UL 294 access control installations where Class 2 wiring methods are required or preferred. If your project calls for more outputs or higher aggregate current — for example, a multi-door corridor with four strikes — consider stepping up to an Altronix multi-output power distribution unit in the same family that offers 4, 8, or 16 fused or PTC-protected outputs at higher amperage ratings. For access control power supplies with battery backup capability, Altronix offers charger-integrated variants; the T14DRSTD does not include a charging circuit, so battery backup would require an external UPS or a different model. Wiring the outputs to electric locks and strikes is straightforward — each PTC output terminates independently, so a fault on door 1 doesn't interrupt door 2.

Frequently Asked Questions

Q: Can the T14DRSTD output both 12VDC and 24VDC simultaneously on its two outputs?

A: No. The T14DRSTD is a single voltage-selectable supply — both outputs operate at the same voltage (either 12VDC or 24VDC), set at the unit. If you need simultaneous 12V and 24V outputs, you'll need two separate power supplies or a dual-voltage unit.

Q: What does 'PTC Class 2 output' mean in practice for installation?

A: PTC (Positive Temperature Coefficient) protection means the output self-resets after a fault clears — there's no fuse to replace. Class 2 limits the output power per NEC Article 725, which allows simplified wiring methods and typically eases code inspection on commercial access control installs.

Q: Does the T14DRSTD include battery backup?

A: No. The T14DRSTD does not include a battery charger or backup capability. If your installation requires backup power for lock hardware, you'll need to pair it with an external UPS or select an Altronix power supply with an integrated battery charger.

Q: What input voltage does the T14DRSTD require?

A: The T14DRSTD requires 115VAC input — standard North American single-phase commercial power. It is not rated for 220VAC input without a separate step-down transformer.

Q: How much current can each output handle on the T14DRSTD?

A: The unit delivers 1.75A total across both outputs combined. Plan your lock draw budget accordingly — a pair of 500mA magnetic locks draws 1A total, leaving 0.75A headroom. Do not assume each output independently supports the full 1.75A.

James Everett

The T14DRSTD is a narrow-purpose unit — and that's exactly what makes it useful. When you're specifying power for a TRL-based door control setup, pulling a matched Altronix supply rather than a generic 12V wall brick means your voltage, current, and output protection characteristics are already engineered to work with the timing relay board. The 1.75A ceiling and dual PTC Class 2 outputs cover the common two-door scenario without over-specifying.

Technical Highlights:

• PTC Self-Reset Protection: Both outputs use PTC devices rather than fuses — a wiring fault that trips the circuit clears automatically when the short is resolved. No service call to replace a blown fuse, which matters in unmanned mechanical rooms or remote door locations.
• Voltage Selectability (12/24VDC): Single-unit flexibility covers both common lock voltages. Setting voltage at the supply before installation means you don't need to stock separate 12V and 24V SKUs across a multi-site job.
• 115VAC Input: Direct connection to any standard 15A or 20A commercial circuit — no step-down transformer, no special wiring. Reduces BOM and keeps the installation straightforward for the electrician of record.

Deployment Considerations:

• The 1.75A output is a combined budget for both outputs — not 1.75A per output. Map out your lock current draws before wiring; a single high-draw magnetic lock plus an electric strike can approach that ceiling quickly.
• No battery charger is integrated, so this unit offers no ride-through on power loss. For any door that requires fail-secure operation with backup power, you'll need to add a UPS or select a charger-integrated Altronix supply instead.

This unit fits cleanest in single-entry or two-door TRL installations — a small office, server room, or equipment cage where you need clean, code-compliant lock power without the overhead of a full multi-output distribution board.