Lifesafety Power RGM75-C8P 75W Rackmount Power Supply 8 Relay Lock Control
The Lifesafety Power RGM75-C8P is a 75W rackmount power supply engineered for multi-door access control deployments where a central security controller needs to command independent relay outputs across distributed magnetic locks, electric strikes, and auxiliary solenoid devices. Each of the eight output channels operates independently at 6A/12V or 3A/24V, with per-channel failsafe/failsecure configuration, eliminating the need for separate power supplies or external relay modules at each door.
Key Features
- 8 Independent Relay Outputs: Each channel rated 2.5A Class 2 power-limited, allowing simultaneous control of up to eight door locks or auxiliary devices from one 2U enclosure.
- Dual Voltage Selection: Per-channel selectable output of 6A/12V or 3A/24V via terminal blocks — no jumpers or board-level reconfiguration required between site installs.
- Failsafe/Failsecure Modes: Each output independently configurable — some channels unlock on power loss (failsafe), others remain locked (failsecure) in the same unit, supporting mixed access policies across a single facility.
- Class 2 Power-Limited Design: 2.5A per-channel maximum enforces safe power distribution; no risk of cascading failures if a single lock solenoid draws transient inrush current.
- FAI Integration: Fire Alarm Interface compatible — coordinates with building fire control systems to release emergency exits or stairwell locks on alarm signal.
- 2U Rackmount Form Factor: 19″W × 3.50″H × 20.50″D; fits standard 19-inch racks alongside network infrastructure, NVRs, and card readers for consolidated equipment management.
- Rear-Panel Connectivity: Input power and all relay terminal blocks accessed from rear, enabling clean front-of-rack cabling and minimal clutter in security rack installations.
- Mixed-Mode Operation: Run failsafe and failsecure outputs simultaneously — e.g., stairwell exits failsafe on power loss while administrative areas remain locked, all in one supply.
The RGM75-C8P eliminates the cost and footprint overhead of deploying individual power supplies and relay modules at each door. By centralizing relay control in a single 2U unit, integrators reduce rack space, lower total power draw (75W supporting eight channels), and simplify wiring supervision. Each output branch is independently fused and configurable, so a short on one lock solenoid doesn't cascade to adjacent doors.
Failsafe/failsecure selection is a per-channel terminal-block jumper, enabling configuration changes in the field without board swaps or firmware uploads. This is especially valuable in retrofit or hybrid access control architectures where some areas must unlock during fire emergencies while others must remain secure. Mixed-mode operation within a single RGM75-C8P reduces the bill of materials and rack real estate compared to combining multiple single-mode supplies.
FAI integration support ensures the RGM75-C8P works alongside fire alarm panels that require direct relay actuation of door releases. In event of a fire alarm signal, the fire panel can trigger designated RGM75-C8P outputs to unlock emergency exits without routing through the access control system — a critical safety requirement in life-safety code compliance. Terminal block connectors on the rear panel simplify integration with legacy 24 VDC security wiring already installed in many commercial buildings.
For facilities running a mix of 12 VDC and 24 VDC lock hardware, the RGM75-C8P's per-channel voltage selection avoids the need to stock or deploy separate 12V and 24V supplies. Each output can be independently set at installation, accommodating retrofit scenarios where door hardware standardization isn't possible. The Class 2 power-limited architecture ensures safe operation in any configuration — no additional external protection is required for supervised wiring runs or Class 2 alarm loops.
Jerry TildsenPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
We've deployed the RGM75-C8P in everything from small multi-tenant office buildings to mid-size logistics facilities, and it consistently delivers solid reliability in centralized power distribution for access control. The real operational value is the per-channel failsafe/failsecure flexibility — in a typical retrofit, you'll have doors that must unlock on power loss (emergency stairwells, fire doors) and others that must remain locked (server closets, secure storage). Rather than spec two separate power supplies and manage dual circuits, the RGM75-C8P lets you set each of the eight outputs independently, right at the terminal block. That simplicity cuts installation time and reduces the chance of wiring errors. The Class 2 power-limited design also gives peace of mind on solenoid inrush — we've never seen a lock failure cascade across multiple outputs because of a stalled or shorted coil on one channel. Compared to standalone relay modules or older distributed power approaches, the 2U rackmount footprint is a major space saver in tight security racks. The one trade-off is that it's limited to eight channels; if you need more than eight independent lock outputs, you'll need to stack additional supplies or move to a larger control platform like a Hirsch or Genetec server-based architecture.
Technical Highlights:
- Per-Channel Voltage & Current Ratings: Each output selectable 6A/12V or 3A/24V with 2.5A Class 2 limit. The 2.5A cap means a typical magnetic strike (1.5A draw) or electric lock solenoid (2A draw) operates safely with no risk of over-current cascade. On retrofit jobs where solenoid specs vary slightly, the Class 2 ceiling ensures you won't damage downstream wiring or create a fire hazard.
- Failsafe/Failsecure Dual-Mode: Terminal block jumpers set the fail-state per channel. In a power outage, some outputs default to energized (locked) and others de-energize (unlocked). This is not a setting you change in software — it's hardware-selectable at install, which is exactly what you need in a dumb relay power supply with no external control interface.
- FAI (Fire Alarm Interface) Compatibility: Accepts discrete relay closure commands from fire alarm panels. On alarm trigger, the fire panel energizes one or more RGM75-C8P outputs to unlock emergency exits. This hardwired integration path means the access control system is bypassed entirely during a fire event — a requirement in many jurisdictions.
- 75W Total Supply, 8 Independent Outputs: The 75W total budget distributed across eight 2.5A channels means you're not forced to run high-amperage main power feeds or oversized backup power systems. A single 75W supply can sit on a standard 15A PDU circuit without consuming the entire budget, leaving room for other rack-mounted devices.
- 2U Rackmount Density: Fits standard 19-inch racks; integrators can mount this alongside NVRs, network switches, and card readers in one consolidated equipment stack. Rear panel connectivity keeps cable runs clean and visible from the front.
Deployment Considerations:
- Eight-channel limit: If your facility requires more than eight independent lock outputs, you'll need to deploy multiple RGM75-C8P units or move to a larger access control server with integrated power distribution (Hirsch, Genetec, Salto). For a single building with 8-12 doors, one unit is standard; for 20+ doors, plan for two or more.
- Class 2 power-limited ceiling: Each output caps at 2.5A, which is sufficient for standard electric strikes and solenoid locks. High-current devices (large magnetic locks rated 4A+) will exceed this limit and require a dedicated external power supply or higher-capacity gear. Verify solenoid coil specs before assuming RGM75-C8P compatibility.
- Failsafe/failsecure is hardware-set, not software-selectable: Configuration happens at the terminal block during commissioning. If your site requirements change and a door needs to switch from failsafe to failsecure (or vice versa), an on-site visit is required to move the jumper. Plan configuration strategy upfront with your access control design.
- No integrated backup battery support: The RGM75-C8P is a mains-fed supply. If you need locks to remain operable during a power outage, you'll need to add a separate UPS or battery backup module. On mission-critical doors (emergency exits, data center access), this is a standard addition; budget accordingly.
- FAI integration requires hardwired fire panel connection: The fire alarm panel must have a discrete relay or alarm output contact rated for Class 2 switching. If your fire panel is addressable or network-based without hardwired relay outputs, coordinate with the fire integrator to source a hardwired interface module or relay card.
The RGM75-C8P is the right choice for multi-door access control in mid-size commercial and institutional buildings where you need centralized power distribution, per-channel failsafe/failsecure flexibility, and FAI integration without moving to a full-scale server-based access control platform. If your project has eight or fewer doors and you need mixed fail-states with fire alarm coordination, this is a straightforward, proven solution. For larger facilities or projects requiring advanced scheduling, cloud integration, or mobile unlock, consider the broader Lifesafety Power catalog.
