Altronix TLM400K1D 4-Door Access Control and PoE Power Integration Kit
Overview
The Altronix TLM400K1D is a factory-assembled, 4-door access control and power integration kit built specifically for deployments that pair LiftMaster Smart Access controllers with Altronix power infrastructure. Everything ships pre-wired inside a single 12"W × 15.5"H × 4.5"D Trove enclosure — a power supply/charger, a 4-output access power controller, a 5-port PoE+ hardened switch, and a factory-installed LiftMaster CAP2D mounting bracket. For integrators running access control across entry points that mix door hardware with IP devices, this kit eliminates the wiring rework and layout time that comes with building the same stack from discrete components.
The kit is TAA, NDAA, and BAA compliant, making it a valid option for federal, state, and education projects where procurement compliance is a hard gate. Components carry CE compliance and UL Listed sub-assembly ratings — verify the specific sub-assembly listings against your AHJ requirements before submitting for permit.
Key Features
- 24VDC @ 4A Continuous Output (eFlow4NB): The power supply delivers a regulated, filtered 24VDC rail at 4A continuous — enough headroom to drive four door controllers plus auxiliary loads simultaneously without voltage sag. Overvoltage protection is built in. The factory default is 24VDC; the unit is also field-configurable for 12VDC if your hardware demands it.
- Battery Backup up to 65AH: The charger supports sealed lead acid or gel batteries up to 40AH (same enclosure) or 65AH with a separate battery enclosure. On AC loss, failover is instantaneous — no gap in door control. Form "C" contacts report both AC failure and battery status back to your panel or monitoring system, so you know about a dead battery before a power event, not during one.
- Low DC Shutdown at 70–75% Threshold: If battery voltage drops below 70–75% of nominal (24V units), the supply shuts down DC output terminals automatically. This prevents deep discharge damage to the battery, which matters when batteries sit in enclosures for years between events.
- Four Independent PTC-Protected Outputs (ACM4CB): Each of the four access outputs is independently PTC-protected at 2.5A. You get fail-safe and/or fail-secure power outputs, Form "C" relays rated at 28VAC/VDC @ 2.5A, and unswitched auxiliary power taps — configurable in any combination per door. A fault on one output doesn't take down the others.
- 5-Port PoE+ Hardened Switch (NetWay5P): The integrated switch delivers up to 30W per port across four PoE/PoE+ ports, with a total PoE budget of 120W when running at 24VDC (60W at 12VDC). All five ports run at 10/100/1000 Mbps with auto-negotiation and auto-crossover over CAT5 or better to 100m. Integral surge protection is included — important when switch gear lives in an IDF closet or door-side enclosure exposed to transients. For integrators building out PoE network switches infrastructure alongside access control, having this switch in-enclosure removes a separate device from the BOM.
- LiftMaster CAP2D Integration (LMBK2 Bracket Factory-Installed): One LMBK2 mounting bracket for the LiftMaster Smart Access 2-Door Controller comes factory-installed in the enclosure. The kit supports up to two CAP2D modules, covering up to four doors without external hardware. If your project specifies LiftMaster as the access credential engine, this kit is the cleanest integration path available.
- Trove Wire Management: The Trove backplane organizes board layout and wire routing inside the enclosure. On a multi-door installation with home-run cabling for readers, REX devices, and door hardware, tidy wire management is not cosmetic — it directly reduces troubleshooting time during commissioning and maintenance callbacks.
- NDAA / TAA / BAA Compliant: All three federal procurement compliance designations are verified for the TLM400K1D. For government facility, education, or publicly funded projects, these designations are a project eligibility requirement, not a marketing detail. Confirm with your procurement officer which specific sections apply to your contract vehicle.
Integration and Compatibility
The TLM400K1D is purpose-built for LiftMaster Smart Access CAP2D integration and is designed around Altronix's own eFlow4NB, ACM4CB, and NetWay5P sub-assemblies. The NetWay5P switch supports standard 802.3af/at PoE devices — IP readers, cameras, intercoms — on any of its four powered ports, making it practical to co-locate IP edge devices at the door without running separate network drops. Compatible accessories from Altronix include the LINQ2 network communication module (for remote power supply diagnostics and monitoring), and WM-series magnetic cable tie mounts for additional wire management. Batteries are sold separately; the charger accepts sealed lead acid or gel types — size your battery bank to your required hold-up time using Altronix's published battery calculator before ordering enclosures.
For projects integrating IP cameras alongside access control, review the PoE planning guide to confirm your total port-watt budget before assigning devices to the NetWay5P. At 24VDC input, the 120W total PoE budget is the ceiling across all four powered ports — a full load of four 30W devices exhausts it. Mixed loads (readers + a single camera) are well within range. Explore the full Altronix access power product line for compatible enclosures, battery cabinets, and expander modules.
What's in the Box
- 1× TM400 Trove enclosure with Trove backplane
- 1× eFlow4NB 24VDC/4A power supply/charger
- 1× ACM4CB 4-output access power controller
- 1× NetWay5P 5-port PoE+ hardened switch
- 1× LMBK2 LiftMaster CAP2D mounting bracket (factory installed)
Frequently Asked Questions
Q: Is the TLM400K1D NDAA Section 889 compliant?
A: Yes. The TLM400K1D carries verified NDAA, TAA, and BAA compliance designations. Confirm applicability to your specific contract vehicle with your procurement officer.
Q: How many doors does the TLM400K1D support?
A: Up to four doors. The kit includes one factory-installed LMBK2 bracket for a LiftMaster CAP2D 2-door controller module; a second CAP2D can be added to reach four-door coverage in a single enclosure.
Q: What is the total PoE budget on the integrated switch?
A: 120W total when powered at 24VDC, or 60W total at 12VDC, distributed across four PoE/PoE+ ports rated up to 30W each. The fifth port is an uplink data-only port with no PoE.
Q: Are batteries included with the TLM400K1D?
A: No. The eFlow4NB charger supports sealed lead acid or gel batteries up to 40AH in the same enclosure or up to 65AH with a separate battery enclosure. Batteries must be ordered separately.
Q: What is the operating temperature range for the TLM400K1D?
A: Operating range is 0°C to 49°C (32°F to 120°F). Storage range extends from -20°C to 70°C. This is a standard indoor enclosure rating — do not install in unheated exterior cabinets in cold climates without supplemental heating.
Q: Can the TLM400K1D output 12VDC instead of 24VDC?
A: Yes. The eFlow4NB power supply ships factory-set at 24VDC but is field-configurable for 12VDC. Note that total PoE output drops from 120W to 60W when running at 12VDC.
The TLM400K1D is one of the more complete single-enclosure integration solutions I've spec'd for LiftMaster-based access deployments. The factory-installed LMBK2 bracket and pre-wired Trove layout mean you're not reverse-engineering a parts kit on site — the assembly work is done. What I pay attention to on this unit is the 70–75% low DC shutdown threshold: that automatic cutoff protects the battery from deep discharge, but it also means if you're undersized on battery capacity and have a long outage, the system goes dark faster than you might expect. Size the battery bank to your hold-up requirements before the job closes, not after.
Technical Highlights:
- 120W PoE Budget at 24VDC: Four ports at up to 30W each with integral surge protection — practical for co-locating IP readers, intercoms, or a single camera at the door frame without a separate network closet drop.
- Instantaneous Battery Failover: The eFlow4NB switches to battery with no gap on AC loss, and Form "C" contacts report both AC failure and battery state — meaning your panel knows about a dead battery before a power event triggers it.
- Independent PTC Outputs at 2.5A: Each of the four ACM4CB outputs is individually protected. A wiring fault or shorted lock on door 3 doesn't pull down doors 1, 2, and 4 — a real differentiator when you're commissioning a high-traffic entry point that can't go fully offline.
Deployment Considerations:
- The operating ceiling is 49°C — adequate for a conditioned IDF room or electrical closet, but marginal in an unventilated telecom cabinet in a sun-exposed exterior enclosure. Confirm ambient temps before mounting.
- The 65AH battery option requires a separate enclosure. If your project spec calls for extended hold-up (>4 hours at full load), budget for and order that enclosure at the same time as the kit — field additions after rough-in are messy.
This kit is the right call for commercial building lobbies, parking garage entry points, or campus gate deployments where LiftMaster Smart Access is the specified credential platform and the integrator needs a single, compliance-verified enclosure to pass inspection and hand off to the facilities team.
