Altronix T316DRSTD 16-Door Mercury Access and Power Integration Kit
Overview
The Altronix T316DRSTD is a pre-engineered integration kit that combines Mercury-compatible access control hardware with a supervised DC power supply inside a single 16-AWG galvanized steel enclosure — purpose-built for TRL Systems deployments. Instead of specifying, procuring, and mounting a controller enclosure separately from a power chassis, the T316DRSTD ships as a unified assembly ready to accept one LP1502 or LP4502 Mercury controller and up to seven MR52 reader interface modules, giving you a clean path to 16 controlled doors without field-fabricating a rack or sourcing a separate power box.
For integrators wiring Mercury-based enterprise access systems, the T316DRSTD eliminates the most common pre-wire headache: enclosure real estate. The 3-inch-high finger duct and pre-punched knockout options — one 2-inch single, two sets of 1.25-inch and 1.5-inch double, and thirteen sets of 3/4-inch and 1-inch double — give you structured cable routing for every reader home run and power circuit the system will carry.
Key Features
- Dual-voltage 10A output (12VDC and 24VDC): Running 10 amps at either 12VDC or 24VDC means you can power locks, readers, and REX devices directly from this enclosure without a separate power distribution board. Dual voltage selection also lets you match lock and device requirements without adding step-down converters in the field.
- PTC output protection: Positive temperature coefficient protection on the DC outputs limits fault current automatically — no manual fuse replacement after a wiring short during commissioning, which matters when you're closing out a 16-door cutover and can't afford diagnostic time chasing a blown fuse.
- Integrated battery charger for sealed lead-acid or gel cells: The onboard charger supports both SLA and gel battery chemistries, so you're not locked into a single battery vendor. Instantaneous transfer to standby power means door control and lock power don't drop during a utility outage — critical for facilities where momentary power loss would trigger a fail-secure lock event.
- AC Fail, Battery Fail, and Battery Presence supervision: Three discrete supervisory outputs report power plant health upstream to your access control software. In a managed TRL deployment, these feeds back into your monitoring platform rather than requiring a technician to physically inspect the enclosure to confirm battery status.
- AC input and DC output LED indicators: Local visual status at the enclosure saves a truck roll when a door goes offline — the first diagnostic step is confirming whether the power plant is healthy, and panel-front LEDs answer that in under five seconds.
- 16-AWG galvanized steel enclosure: Commercial-grade steel construction provides tamper resistance appropriate for IDF rooms and utility closets where the enclosure may not be in a secured server room. Galvanized finish resists corrosion in environments with humidity variation typical of mechanical rooms.
- 3-inch finger duct wire management: Structured cable routing inside the enclosure keeps home runs separated and traceable at the punch-down level — reduces troubleshooting time on intermittent reader faults by keeping wiring organized from day one.
- Pre-punched knockout pattern (16 total): One 2-inch single, two double 1.25-inch/1.5-inch pairs, and thirteen double 3/4-inch/1-inch pairs accommodate the conduit and cable entry combinations typical of a 16-door installation without requiring field drilling into the enclosure.
Integration and Compatibility
The T316DRSTD is sized and configured specifically for Mercury-protocol controllers used in TRL Systems deployments. The enclosure accommodates one LP1502 or LP4502 as the primary controller, with mounting provisions for seven MR52 reader interface modules — the combination that drives 16 supervised door points. This is not a generic power-and-rack kit; the controller mounting positions, wiring channels, and power sizing are matched to this specific hardware combination.
Input power is 115VAC, which is standard North American line voltage. No step-down transformer or special circuit is required beyond a dedicated 20A branch circuit appropriate for a 10A continuous DC load. The T316DRSTD draws from a single access control power feed and distributes to all downstream devices within the enclosure.
For integrators building out Altronix power and integration solutions, the T316DRSTD fits within the broader family of Altronix multi-door integration kits, which follow a consistent wiring and supervision architecture across different door counts and controller families. If you are evaluating access control power distribution options for smaller deployments, Altronix offers single- and four-door variants in the same product line.
Frequently Asked Questions
Q: What Mercury controllers does the T316DRSTD support?
A: The T316DRSTD is configured for one LP1502 or LP4502 Mercury controller and up to seven MR52 reader interface modules, supporting a total of 16 controlled door points.
Q: What are the DC output specifications for the T316DRSTD?
A: The T316DRSTD provides 10 amps at 12VDC or 10 amps at 24VDC. Output is protected by PTC (positive temperature coefficient) devices — no manual fuse replacement is required after a fault.
Q: What battery types does the T316DRSTD charger support?
A: The onboard battery charger supports sealed lead-acid (SLA) and gel cell batteries. Transfer to standby battery power is instantaneous on AC loss.
Q: What supervisory outputs does the T316DRSTD provide?
A: The T316DRSTD supervises AC Fail, Battery Fail, and Battery Presence — three discrete conditions that can feed into an access control management platform for remote monitoring.
Q: What is the input voltage requirement for the T316DRSTD?
A: Input is 115VAC — standard North American single-phase line voltage. No step-down transformer is required.
Q: How many conduit knockouts does the T316DRSTD enclosure provide?
A: The enclosure includes 16 knockouts total: one 2-inch single, two double-knockout pairs (1.25-inch and 1.5-inch), and thirteen double-knockout pairs (3/4-inch and 1-inch), covering the conduit and cable entry combinations typical of a 16-door installation.
The T316DRSTD earns its place on TRL System deployments because of one specific design decision: the instantaneous battery transfer. On a 16-door system, a momentary AC dropout that takes even 200ms to transfer to battery can trigger a nuisance unlock event on fail-secure hardware — that's a security incident, not just a power annoyance. Altronix built the T316DRSTD to transfer without a break, which is the correct behavior for any access control power plant in a security application.
Technical Highlights:
- 10A dual-voltage output: 10 amps at 12VDC or 24VDC is sized for a full 16-door Mercury deployment including reader power — no auxiliary power distribution module required in most installations.
- Three-point power supervision (AC Fail, Battery Fail, Battery Presence): These feed actionable alarm data upstream; in a monitored TRL deployment you get remote visibility into power plant health rather than discovering a dead battery on the day you need it.
- PTC output protection: Self-resetting faults mean a wiring short during commissioning doesn't become a parts run — the circuit recovers once the fault is cleared, which matters when you're on a tight cutover schedule.
Deployment Considerations:
- The enclosure is sized for exactly one LP1502 or LP4502 plus seven MR52s — confirm your Mercury controller model before ordering; the LP1502 and LP4502 are not interchangeable in terms of door capacity and software licensing, even though both physically fit this kit.
- Battery type flexibility (SLA or gel) is a real advantage in jurisdictions where gel cells are preferred for sealed mechanical rooms, but confirm battery dimensions against the enclosure's battery compartment — Altronix kits at this power level typically spec a specific AH range for runtime calculations, and oversized batteries may not physically fit.
The T316DRSTD is the right specification for a ground-up TRL Systems deployment in a mid-size commercial building — 16 doors in a single managed enclosure with supervised power is a cleaner infrastructure story than distributed power taps, and it simplifies both the initial inspection and any future service call where power troubleshooting is the first step.
