Lifesafety Power RGM75B-C8PZ/T4-A 75W Rackmount Power Supply
Overview
The Lifesafety Power RGM75B-C8PZ/T4-A is a 75W, dual-output rackmount power supply designed for security integrations requiring redundant voltage rails and multiple access control relay outputs. This unit pairs a primary 6A/12V or 3A/24V output with an adjustable 5–18V secondary rail—a configuration that scales across smaller multi-door access panels and hybrid CCTV/access deployments without requiring a separate auxiliary supply. The enclosure measures 19.00W × 3.50H × 20.50D inches and mounts in a standard 2U rack position, consolidating power and relay switching into a single form factor.
Field integrators deploying the RGM75B-C8PZ/T4-A typically value its eight relay lock control outputs and per-output failsafe/failsecure selection, which eliminate the need for external relay modules in moderate-scale access systems. Each output is class 2 power limited at 2.5A maximum—sufficient for electromagnetic locks, solenoids, and alarm strobes on independent circuits.
Key Features
- Dual Primary Output: Delivers either 6A at 12VDC or 3A at 24VDC depending on your lock/solenoid voltage preference. This flexibility avoids stock-keeping headaches when integrators work across both 12V and 24V sites in the same region.
- Adjustable Secondary Rail: 5–18V @ 4A maximum output addresses auxiliary devices (notification modules, sensor supplies, auxiliary readers) on a separate, independently regulated rail. Decoupling the secondary from the primary prevents a single high-current load from collapsing voltage to your main locks.
- Eight Relay Lock Outputs: Each output is selectable for failsafe or failsecure operation and rated at class 2 power limited 2.5A per channel. This means no external relay board for an 8-door system, and on-the-fly failsafe/secure assignment eliminates field rewiring if lock strategy changes post-installation.
- 2U Mercury Rackmount Enclosure: Pre-drilled 19-inch mounting ears, articulating Z-bracket wire management, four hinged doors, and integrated MR52 / EP1502 board mounting points. Tiewraps included for bundling secondary and auxiliary wiring—standard practice for production integrations.
- Class 2 Power Limited Design: All relay and secondary outputs meet class 2 power-limited ratings, simplifying code compliance for access control and low-voltage circuits in commercial buildings. No additional current-limiting transformers required for monitored access panels.
- Compact Secondary Footprint: The articulating Z-bracket and integrated board slot reduce external wiring complexity compared to stacked 1U supplies. In tight rack environments, keeping the secondary supply and relay module in a single enclosure saves space and labor on termination.
Integration & Compatibility
The RGM75B-C8PZ/T4-A accepts Mercury MR52 or EP1502 control boards—common in mid-range access control systems. The eight relay outputs connect directly to lock magnets, exit-device solenoids, and auxiliary switching without external buffering, assuming load impedance matches the 2.5A per-output rating. The primary supply voltage is selectable at the factory or through a jumper block; confirm your order specification aligns with your primary distribution voltage (12V vs. 24V) to avoid field modifications.
Secondary circuits (5–18V adjustable) typically feed wireless reader modules, sensor inputs, or field-device communications. Test load current on the secondary rail during commissioning—the 4A limit accommodates most standard readers and sensor batteries, but high-current accessories or multiple readers may require external regulators.
What's in the Box
- 1× RGM75B-C8PZ/T4-A Power Supply Assembly (2U Mercury enclosure, pre-populated with MR52/EP1502 board)
- 1× Z-Bracket Wire Management Arm (articulating, for internal harness routing)
- Tiewraps (quantity as supplied, for secondary/auxiliary bundling)
- 4× Hinged Doors (pre-installed)
Frequently Asked Questions
Q: Can I field-switch the RGM75B-C8PZ/T4-A between 12V and 24V primary output?
A: Factory configuration locks the primary voltage choice (12V @ 6A or 24V @ 3A). If you need to change primary voltage after installation, contact the manufacturer—internal jumper or component changes may apply. Confirm output voltage at order time.
Q: What's the maximum number of locks I can control with the eight relay outputs?
A: Each of the eight outputs is rated at 2.5A maximum. For electromagnetic locks drawing under 2.5A each, you can control up to eight independent locks (one per relay). If your locks exceed 2.5A, use external relay boards or parallel multiple outputs—do not exceed 2.5A per channel.
Q: Does the RGM75B-C8PZ/T4-A include battery backup?
A: The unit does not include integrated battery or backup circuitry. To add uninterruptible power, mount an external battery module in the same rack or use a separate UPS system upstream of the 2U enclosure.
Q: What is the input voltage requirement for the RGM75B-C8PZ/T4-A?
A: Consult the product documentation or the Mercury MR52/EP1502 board specifications—input voltage is not fully detailed in available field summaries. Contact the manufacturer for exact AC input range and protection specifications.
Q: Can I mix failsafe and failsecure modes on different outputs?
A: Yes. Each of the eight relay outputs is independently selectable for failsafe or failsecure operation. This allows, for example, exits and emergency exits to fail to unlocked state while main entry doors fail to locked state—all within a single relay module.
Q: What's the adjustment range on the secondary 5–18V output?
A: The adjustable secondary rail supplies 5–18V @ 4A maximum. Most auxiliary readers and sensor supplies require 12V or 24V (via the primary rail), so the secondary is typically set to a single voltage during initial commissioning and left stationary. Potentiometer adjustment is available if your design requires 5V, 9V, or 15V auxiliary supplies.
The RGM75B-C8PZ/T4-A (often searched as RGM75B C8PZ/T4 A) consolidates two of the most common integrator headaches—primary power distribution and relay-based lock switching—into a single 2U chassis. The dual output topology (6A/12V or 3A/24V primary, plus adjustable 5–18V secondary @ 4A) makes this unit realistic for warehouse access control, small retail multi-door systems, and hybrid CCTV/access installs where you're already committing to rack-mounted infrastructure.
Technical Highlights:
- Eight Failsafe/Failsecure Relay Outputs: 2.5A per output means no external relay buffers for an 8-door system. Per-output failsafe selection eliminates costly field rewiring when code or client preference changes after commissioning.
- Adjustable Secondary Rail (5–18V @ 4A): Decoupled from primary means auxiliary loads (readers, sensors, notification modules) won't sag the voltage supplying your locks under transient spike. Standard practice in installations where multiple subsystems share the same rack.
- 2U Rackmount Density: Articulating Z-bracket and pre-drilled Mercury board mounting reduce external harness complexity. In a 42U rack with an NVR, network, and multiple power supplies, saving physical space and termination labor is real ROI.
Deployment Considerations:
- Factory-Lock Voltage Selection: 12V/24V primary is set at manufacture. If you're unsure which voltage your locks require, verify before ordering—field modification requires component swaps or jumper access inside the enclosure.
- Load Verification During Commissioning: The 4A secondary limit is adequate for most reader modules, but wireless or multi-reader setups may push auxiliary current. Test under full load (all readers powered, all sensors active) before final sign-off.
- No Battery Backup Built-In: If your access control design requires power-fail-secure (locks remain locked on power loss), you must add external battery and charging circuitry. Plan this separately—don't assume the supply includes UPS capability.
Position the RGM75B-C8PZ/T4-A for mid-scale access control deployments (4–8 doors) where you're already running a network rack and want to eliminate a separate relay module cabinet. It cuts labor on dual-supply wiring and gives you per-door failsafe flexibility—real value for correctional facilities, warehouses, and retail chains managing multiple door types on a single control panel.
