Altronix T1RHW3F4 2U Rack-Mount 4-Door Access Control Power System
The Altronix T1RHW3F4 is a fully integrated, 2U rack-mount power and access control distribution system engineered for Honeywell-compatible 4-door deployments. It combines an eFlow6NB power supply, VR6 voltage regulator, PDS8 power distribution module, and ACM4 access power controller into a single 19-inch rack chassis — eliminating the wiring overhead and enclosure juggling that typically slows down multi-door installations. If you're deploying a 4-door Honeywell access control system and want all power, regulation, and distribution consolidated in one serviceable rack unit, the T1RHW3F4 is worth a close look.
Overview
Rack-integrated access control power systems like the T1RHW3F4 exist because distributed power architectures — individual supplies wired door-by-door — create maintenance headaches, inconsistent voltages at the panel, and cabinets full of mismatched components. This Altronix solution standardizes all of that into a 3.375" × 19.0" × 26.5" 2U chassis pre-configured for Honeywell 4-door controllers. The included access control hardware — ACM4 controller, PDS8 distribution module, VR6 regulator, and eFlow6NB supply — ships as a validated assembly rather than a parts kit, which matters for integrators who need to move fast on commercial fit-outs.
Key Features
- 24VDC Main Output at 5.4A: The regulated 24VDC bus at 5.4A provides enough headroom to power four doors' worth of electrified hardware — strikes, maglocks, and readers — without the voltage sag that unregulated supplies produce under load. Stable voltage at the panel means fewer nuisance unlocks from undervoltage trips.
- 32V Auxiliary Output at 3.5A: The 32V/3.5A auxiliary rail gives you a separate power path for auxiliary loads — supplemental readers, output devices, or relay-driven hardware — so door-locking circuits don't compete with ancillary equipment on the same bus. This separation simplifies troubleshooting: if an aux device misbehaves, it can't drag down the primary locking circuit.
- Input Voltage Range 20.28–26.4 VDC: The input accepts a 20.28–26.4 VDC range, which means it can be fed from a range of upstream power sources without a dedicated transformer change-out. Worth noting during retrofit installs where the upstream supply voltage isn't always clean.
- Integrated VR6 Voltage Regulator: The VR6 regulator actively holds output voltage steady regardless of input fluctuation within spec. In commercial buildings where HVAC load cycling causes brownout-level dips on the panel, this prevents the false unlocks and panel resets that plague installations relying on raw unregulated DC.
- ACM4 Access Power Controller: The ACM4 manages power distribution to individual door circuits with per-output control — allowing integrators to cut power to a specific door's lock or reader without taking down the entire system. That's critical for service calls where you need to troubleshoot one door without disrupting others.
- PDS8 Power Distribution Module: The PDS8 provides eight supervised distribution outputs. Supervision means the system can detect a wiring fault or short on any output independently, giving your monitoring station a precise fault location rather than a system-wide alarm.
- 10A/250V Input Fuse + 15A/32V Output Fuse: Dual fuse ratings — 10A on the input, 15A on the 32V output — provide fault protection at both the supply side and the distribution side. This layered protection prevents a downstream wiring fault from taking out the supply, and vice versa.
- 2U 19-Inch Rack Form Factor (3.375" × 19.0" × 26.5"): The standard 19-inch rack footprint fits directly into IT-style telecom cabinets and AV racks already common in commercial facilities. At 2U, it occupies minimal rack real estate while keeping all components front-accessible for maintenance.
- CE Agency Listing: CE listing confirms the unit meets European conformity requirements for electrical safety and electromagnetic compatibility — relevant for deployments in CE-jurisdiction facilities or multi-national enterprise campuses with standardized procurement requirements.
- Included Tamper Switch and Cam Lock: The integrated tamper switch triggers an alert if the chassis is opened without authorization, adding a physical security layer to the power infrastructure itself. The cam lock prevents casual access to internal components in shared or publicly accessible equipment rooms.
Integration and Compatibility
The T1RHW3F4 is purpose-built for Honeywell 4-door access control configurations, with the ACM4 controller and supporting components pre-matched to Honeywell panel requirements. Integrators deploying Honeywell Pro-Watch, WIN-PAK, or compatible controllers should verify panel input voltage and current draw against the 24VDC/5.4A main output to confirm headroom before specifying this unit for high-door-count lock combinations. For broader Altronix power solutions across your project, the brand's modular architecture often allows the eFlow6NB supply to be upgraded within the same chassis footprint if future expansion requires higher current. Pair this unit with a compatible managed PoE switch for IP reader infrastructure in the same rack to keep the installation clean and consolidated. If you're selecting components for a full access control buildout, the access control power supplies category covers additional Altronix configurations for larger or smaller door counts.
Frequently Asked Questions
Q: What access control platform is the T1RHW3F4 designed to work with?
A: The T1RHW3F4 is configured specifically for Honeywell 4-door access control deployments. It includes the ACM4 access power controller, PDS8 distribution module, VR6 voltage regulator, and eFlow6NB power supply pre-matched for Honeywell panel compatibility.
Q: What are the main and auxiliary output voltages and current ratings?
A: The main output is 24VDC at 5.4A. The auxiliary output is 32V at 3.5A. These are separate regulated rails, so auxiliary loads do not compete with primary door-locking circuits.
Q: What rack space does the T1RHW3F4 require?
A: The unit occupies 2U in a standard 19-inch rack. Physical dimensions are 3.375" (H) × 19.0" (W) × 26.5" (D).
Q: What input voltage does the T1RHW3F4 accept?
A: The input voltage range is 20.28 to 26.4 VDC. Confirm your upstream power source falls within this range before installation.
Q: What agency listings does the T1RHW3F4 carry?
A: The T1RHW3F4 carries a CE listing, confirming compliance with European electrical safety and EMC requirements.
Q: What physical security features are included in the T1RHW3F4 chassis?
A: The unit includes a tamper switch that triggers an alert on unauthorized chassis access, a cam lock to restrict physical access to internal components, and mounting hardware for rack installation.
The T1RHW3F4 is one of those assemblies that saves integrators real time on 4-door Honeywell buildouts — the 24VDC/5.4A main rail paired with the ACM4 and PDS8 means you're not sourcing and sizing individual components; Altronix has already validated the stack. I reach for it when a customer needs a clean rack installation and doesn't want three separate enclosures managing what one 2U chassis can handle.
Technical Highlights:
- Dual regulated outputs: 24VDC at 5.4A (main) and 32V at 3.5A (auxiliary) operate on independent rails — keeps lock circuits isolated from auxiliary device loads, which simplifies fault isolation significantly.
- Layered fuse protection: 10A/250V on the input side and 15A/32V on the output side means a downstream wiring fault won't cascade into the supply — each protection layer is independently replaceable without touching the other.
- Supervised PDS8 distribution: Eight supervised outputs let the monitoring platform pinpoint which door circuit has a fault rather than triggering a blanket system alarm — that's a material difference during after-hours service calls.
Deployment Considerations:
- The input range tops out at 26.4 VDC — verify your upstream DC source stays within the 20.28–26.4 VDC window under full load; exceeding spec will void the protection stack's design assumptions.
- The 3.375" × 26.5" depth profile is deeper than a shallow-depth wall-mount rack can accommodate — confirm cabinet depth before specifying this unit in tight IDF closets.
The T1RHW3F4 is the right call for commercial office or campus deployments where a Honeywell 4-door controller is already specified, the integrator is working from a telecom rack, and a single serviceable power assembly beats a multi-enclosure DIY approach on every maintenance visit after commissioning.
