Altronix T2RM7CK1DV 24VDC Rack-Mount Power Supply with Battery Failover
Overview
The Altronix T2RM7CK1DV is a 2U, 19-inch rack-mount power supply engineered for commercial security installations running on 220VAC mains — the standard in European and international deployments. It delivers 24VDC at 6A continuous, provides instantaneous battery failover on AC loss, and ships in a slim 2U enclosure sized for standard EIA 19-inch racks. If your project specifies 220V input, supervised fire alarm disconnect, and Form C dry contacts for monitoring integration, the T2RM7CK1DV is built around those requirements. Browse the full Altronix power and control catalog for complementary components.
Key Features
- 24VDC / 6A Continuous Output: Provides enough headroom to drive multiple door controllers, locks, or access readers on a single supply — reducing the number of rack units needed compared to distributing smaller supplies across the installation.
- 220VAC Input (198–256VAC, 50/60Hz): Accepts the full European and international mains voltage range. The ±28V tolerance absorbs site-level fluctuations without nuisance shutdowns — important in facilities where utility power isn't always clean.
- Instantaneous Battery Failover: On AC loss, the unit switches to sealed lead-acid or gel battery without detectable interruption. Access control panels and lock hardware stay live, preventing a power event from becoming a security event. Compatible with access control systems requiring uninterrupted 24VDC.
- 1A Unswitched Auxiliary Output: Powers auxiliary devices — keypads, sensors, or panel logic — that must remain live regardless of the main output state. Eliminates a separate small supply for always-on loads.
- Supervised Fire Alarm Disconnect (Latching or Non-Latching): Supports direct integration with fire alarm systems. Selectable latching or non-latching behavior lets the integrator match the AHJ's requirement without external relays.
- Form C AC Failure and Battery Failure Contacts: Two independent Form C dry contacts report power status back to a panel or monitoring system. You get distinct signals for AC loss versus battery fault — critical for facilities that need to distinguish between a grid outage and a degraded battery.
- Low DC Power Shutdown at 70–75%: Protects sealed lead-acid batteries from deep discharge by shutting down the load before cell damage occurs. Extends battery service life in installations where AC outages are frequent or prolonged.
- 2U / 19-inch EIA Rack Form Factor: At 3.25 × 19.0 × 33.1 inches and 40.5 lb, this unit occupies exactly 2U in a standard rack. Plan your rack layout accordingly — 33 inches of depth requires a full-depth cabinet. Pair with a compatible rack-mount UPS or power distribution unit for a complete power architecture.
- CE European Conformity: Agency-listed for CE, confirming the design meets EU safety and EMC directives. Required for deployments in EU member states and many markets that accept CE as a baseline.
- Operating Range 0°C to 49°C: Rated for standard indoor mechanical room and IDF closet environments. Not intended for uncontrolled outdoor or extreme-cold applications.
Integration and Compatibility
The T2RM7CK1DV is designed for 220VAC environments and is not a dual-voltage unit — verify your facility's mains voltage before specifying. The supervised fire alarm disconnect and dual Form C contacts make it straightforward to wire into most commercial fire and intrusion panels. Battery type is field-selected: sealed lead-acid and gel cells are both supported. Consult your security power supply selection guide to match battery capacity to your required backup runtime based on load current. The 6A continuous output suits mid-size access control deployments; larger installations with higher aggregate lock currents should evaluate higher-output units in the Altronix rack-mount line.
Frequently Asked Questions
Q: What input voltage does the T2RM7CK1DV require?
A: The T2RM7CK1DV requires 220VAC input, with an acceptable range of 198VAC to 256VAC at 50 or 60Hz. It is not designed for 120VAC North American mains — verify your facility runs 220V before ordering.
Q: What battery types are compatible with this unit?
A: The T2RM7CK1DV supports sealed lead-acid (SLA) and gel-type batteries. Specific battery capacity depends on your required backup runtime and connected load current.
Q: How does the fire alarm disconnect work?
A: The supervised fire alarm disconnect can be configured for latching or non-latching operation, allowing the integrator to match the local AHJ requirement. This enables direct integration with fire alarm panels without additional relays.
Q: What rack space does the T2RM7CK1DV occupy?
A: The unit mounts in a standard EIA 19-inch rack and occupies 2U of rack space. The enclosure depth is 33.1 inches — a full-depth cabinet is required.
Q: What agency listings does the T2RM7CK1DV carry?
A: The T2RM7CK1DV carries CE European Conformity listing, making it suitable for EU member state deployments and markets that accept CE certification.
Q: What happens to the auxiliary output during an AC failure?
A: The 1A auxiliary output is unswitched, meaning it remains live during AC loss as long as battery backup is available. This keeps always-on loads — such as panel logic or keypads — continuously powered through an outage.
The T2RM7CK1DV is one of those units that gets specified when the job is international and the power architecture can't be an afterthought. The 198–256VAC input tolerance is the detail that matters most on European and Middle Eastern sites — utility fluctuations in those markets are real, and a supply that trips at the edge of nominal becomes a service call waiting to happen.
Technical Highlights:
- 6A Continuous at 24VDC: Enough current to run a mid-size access control riser — multiple electromagnetic locks, a panel, and readers — from a single 2U slot. At 123 BTU/Hr thermal dissipation, it won't push your cabinet's thermal budget hard either.
- Dual Form C Contacts: Separate dry contacts for AC failure and battery failure mean your monitoring system can distinguish between a grid event and a degraded battery — two very different response workflows. This is the spec that separates a managed power supply from a basic one.
- Low DC Shutdown at 70–75%: The discharge cutoff protects SLA and gel cells from deep-cycle damage. In sites where outages run long, this is what keeps the battery from needing replacement after the first real event.
Deployment Considerations:
- At 33.1 inches deep and 40.5 lb, this unit requires a full-depth EIA 19-inch cabinet and a two-person lift during rack installation. Build that into your site survey and installation schedule.
- This is a 220VAC-only unit — the input fuse is rated 6.3A/250V and the circuit is not dual-voltage. Connecting to 120VAC mains will not work and may damage the supply. Confirm mains voltage at the panel before the unit ships to site.
The T2RM7CK1DV is the right specification for international access control projects — EU healthcare facilities, airport concourses, or commercial campuses running 220V infrastructure — where supervised fire integration, battery failover, and CE compliance are non-negotiable line items on the submittal.
