Lifesafety Power RGM150B-C8PD8PZ 4 Door 150W Integrated Mercury

We've deployed the RGM150B-C8PD8PZ across office parks, healthcare facilities, and multi-tenant campuses where 4-door power consolidation is the baseline requirement. What differentiates this unit is the marriage of 150W capacity with integrated battery charging—a combination that eliminates a separate charger module and simplifies electrical enclosure design. On a typical 16-door deployment (four of these supplies stacked), removing four external chargers saves cabinet space equivalent to roughly three vertical inches and reduces interconnect labor by 8–10 hours. The Mercury architecture's dual-voltage output is operationally useful; we've seen retrofits where existing 12V mag-locks remain in service on doors 1–2 while new 24V electronic locks are installed on doors 3–4, all fed from the same supply. No voltage conversion hardware needed. Against alternatives like four standalone PSUs plus a central charger, the RGM150B-C8PD8PZ trades slightly higher per-unit cost for dramatically lower system cost and labor when you account for cabling, fusing, and commissioning time. The one trade-off: if your site requires asymmetric load distribution (e.g. one door pulling 50W continuous while others draw 10W standby), you must calculate the full 150W budget conservatively. Oversizing is rare, but undersizing guarantees a callback.

Technical Highlights:

• Integrated Battery Charger: Built-in float charging eliminates the need for a separate PSU charger module. Typical charger draws 50–100mA in float mode, negligible within the 150W budget. Reduces cabinet component count from three units to one and simplifies electrical schematics.
• Dual Voltage Output (12VDC / 24VDC): Independently regulated rails allow simultaneous 12V legacy loads and 24V modern locks on the same supply without cross-interference. Voltage drop across each rail is typically <2% under full rated load, maintaining lock actuation time within manufacturer tolerance.
• Four Pre-Wired Door Circuits: Each circuit is fused individually (typically 15A–20A per door, depending on lock type). Field-ready harnesses eliminate 4–6 hours of termination labor and reduce wiring error risk on high-touch installations.
• 150W Total Power Budget: Scaled for 4-door deployments at typical 30–40W per door draw. A 24VDC electronic lock plus solenoid strike draws 35–45W in duty cycle; a 12V mag-lock draws 25–35W. The supply assumes 80–90% utilization across all four doors simultaneously, leaving 15–20W headroom for transient inrush current.
• Thermal Stability: Designed for continuous 24/7 duty in climate-controlled electrical rooms (65–95°F ambient). No derating in normal office/data-center environments. In unconditioned outdoor cabinets, thermal management and ventilation are critical—oversizing or active cooling may be required.

Deployment Considerations:

• Load Calculation is Non-Negotiable: Verify the sum of all four door loads (lock + solenoid + reader + PIR if applicable) stays below 120W continuous, leaving 30W headroom for inrush peaks. Exceeding 150W total will trigger current limiting or shutdown. We've seen integrators assume 20W per door and then discover a mag-lock retrofit consumed 45W; the result is undersized supply and nuisance resets during peak access periods.
• Battery Backup Scope Definition: Decide upfront which doors require UPS egress and which can remain unpowered in a mains failure. The charger maintains *all* connected batteries, but you must specify which circuit relays are energized by battery power. Typical practice: energize release-on-loss circuits (all doors unlock) or select critical egress paths (main lobby, emergency stairs). Document this in commissioning notes.
• Enclosure Environment Matters: This supply is rated for climate-controlled cabinets. If mounted in an outdoor electrical enclosure or unheated warehouse, temperature extremes will shorten component life and may trigger thermal shutdown. Add a thermostat-controlled heater or fan if outdoor mounting is unavoidable.
• Cable Gauge and Run Distance: 12VDC and 24VDC outputs have different voltage-drop sensitivity. For a 24VDC mag-lock 50+ feet from the supply, use 10 AWG or larger to keep drop under 2%. 12VDC locks are more forgiving; 12 AWG is acceptable to 30 feet. Undersized cable lengthens lock actuation time and may cause solenoid chatter.
• Access Control System Integration: Confirm your access control panel supports independent 12VDC and 24VDC load switching. Most modern systems (Honeywell, Lenel, Salto, Genetec) handle this natively; legacy panels may not. If your panel only supports 24VDC switching, the dual-voltage feature is unutilized—which is fine, but don't pay for a feature you can't use.

The RGM150B-C8PD8PZ is the right choice for integrators building 4-door access systems in commercial real estate, healthcare, or multi-tenant facilities where power consolidation and integrated backup charging are baseline requirements. Specifying this supply versus four separate PSUs is an instant win on cost, labor, and cabinet real estate. See the Lifesafety Power catalog for complementary power supplies, batteries, and backup modules.