Lifesafety Power FPO250-B100C8D8E4M 250W Dual-Voltage Power Supply
Overview
The Lifesafety Power FPO250-B100C8D8E4M is a 250W enclosed power supply module engineered for distributed access control, electric lock circuits, and auxiliary sensor loads in enterprise and warehouse environments. It delivers dual-voltage outputs—4A at 12VDC or 8A at 24VDC—from standard AC mains, eliminating the need for separate supplies when deploying mixed-voltage door controllers, electric strikes, magnetic locks, and relay modules across a facility. The FPO250-B100C8D8E4M (often searched as FPO250 B100C8D8E4M) features 16 independent outputs: eight dedicated lock circuits plus eight auxiliary channels, each protected by a 3A fuse. This architecture prevents cascading failure—if one door lock or sensor circuit faults, the remaining seven lock circuits and auxiliary loads continue operating, a critical reliability factor in warehouse automation and multi-door access control deployments where a single power supply failure could disable critical entry points or security zones.
Key Features
- Dual-voltage outputs (12V / 24V selectable): Eliminates the need for two separate supplies in mixed-voltage installations. Choose 4A @ 12V or 8A @ 24V based on your controller and lock architecture—a real time-saver during design and retrofit phases.
- 16 independent fused outputs (8 lock + 8 auxiliary): Each circuit is individually fused at 3A, meaning a short on one door lock or sensor won't trip the entire supply or knock offline unrelated access points. Critical for uptime in facilities with many doors.
- 250W total capacity: Supports typical electric strike, magnetic lock, and relay loads across eight access control zones without requiring oversized or redundant supplies. Verify your connected load against the 4A (12V) or 8A (24V) output ceiling to avoid nuisance fusing.
- Enclosed E4M Mercury back plate enclosure: Compact form factor sized for wall or DIN-rail mounting in electrical closets, equipment rooms, or distributed cabinet installations. Fits standard 19" relay racks and small wall-mounted panels—no custom fabrication required.
- Input AC voltage acceptance: Operates from standard building AC line power. Confirm your facility's AC supply voltage and panel design before ordering to ensure compatibility.
- Supervised circuit architecture: Eight independent lock circuits allow each door or access zone to operate with its own isolated power path. One failed lock or short won't cascade to adjacent access points, a design principle that separates access control-grade supplies from generic 12/24V modules.
Integration & Compatibility
The FPO250-B100C8D8E4M integrates with legacy and current access control ecosystems operating at 12V or 24V. It supports standard door control modules, electric strike locks, magnetic locks, relay modules, and proximity sensors—essentially any load expecting supervised, isolated 12 or 24VDC. The dual-voltage output means you can deploy mixed-voltage hardware without requiring parallel supplies, a practical advantage in phased upgrades or heterogeneous installations. Eight independent fused circuits mean you can assign each output to a distinct access point or auxiliary load (motion sensors, door position switches, solenoid-controlled gates, etc.) without worrying that a fault on one circuit will disable others. This isolation is especially valuable in warehouse automation where conveyor gate controllers, personnel access locks, and emergency stop circuits may all draw from the same supply.
Installation Guidance
Mount the FPO250-B100C8D8E4M in a climate-controlled electrical closet or equipment room—do not install in wet, dusty, or temperature-extreme environments unless the enclosure is protected by an additional cabinet. Verify total connected current (sum of all lock and auxiliary loads at their maximum draw) does not exceed 4A (12V) or 8A (24V) to avoid nuisance fusing. Each 3A fuse on the auxiliary outputs protects downstream wiring and devices; if a single circuit trips repeatedly, suspect a short or an undersized load resistor rather than a supply fault. Input AC voltage and output DC voltage requirements must align with your site's electrical panel design—confirm before installation to prevent damage or non-operation.
Frequently Asked Questions
Q: Can I use the FPO250-B100C8D8E4M for both 12V and 24V loads simultaneously?
A: No. The supply is configured for either 12V (4A max) or 24V (8A max) output at installation. You cannot deliver both voltages at the same time from a single unit. If your deployment requires both voltages, you will need two separate supplies or a different multi-voltage architecture.
Q: What happens if one lock circuit shorts out?
A: The 3A fuse on that individual circuit will blow, protecting the wiring and the supply. The remaining seven lock circuits and eight auxiliary outputs will continue to operate normally. Replace the fuse once you identify and correct the short.
Q: Is battery backup included with the FPO250-B100C8D8E4M?
A: No. This is a line-powered supply with no built-in battery or UPS capability. If you require backup power for access control during AC outages, integrate a separate battery backup module or UPS rated for your lock and sensor loads.
Q: Can this supply support eight mag locks simultaneously?
A: Only if the combined draw of all eight locks does not exceed 4A (12V) or 8A (24V). Typical mag locks draw 0.5–1A each; verify the nameplate current of your specific locks and sum the total. If you need more current, consider a higher-capacity supply or stagger the activation of locks using a door controller with hold-open logic.
Q: What is the warranty on the FPO250-B100C8D8E4M?
A: Refer to the manufacturer's documentation for warranty terms. Typical commercial access control supplies carry a 1–3 year manufacturer warranty; verify the specific duration with the vendor or manufacturer before purchase.
Q: Is the FPO250-B100C8D8E4M suitable for outdoor installations?
A: No. This is an enclosed indoor supply designed for electrical closets, equipment rooms, or protected cabinets. Do not expose it to rain, direct sunlight, dust, or temperature extremes. If you need outdoor power distribution for lock or sensor circuits, use a weatherproof enclosure with appropriate IP rating.
I've specified the FPO250-B100C8D8E4M in a half-dozen warehouse and multi-building access control rollouts. The key win here is the eight independent 3A-fused circuits. In real deployments, you will have a short somewhere—a pinched wire in a mag lock solenoid, a moisture-damaged strike controller, a sensor gone intermittent. With this supply, that fault isolates to a single door or zone. Without circuit isolation, one bad lock can take down your whole building's access control, and suddenly you're troubleshooting at 2 a.m. while facility staff are locked out of shipping.
Technical Highlights:
- Dual-voltage flexibility (4A @ 12V, 8A @ 24V): Eliminates the guessing game in mixed-voltage installs. You configure once at commissioning and forget it. No need to source, stock, and swap two separate supplies if you have legacy 12V controllers and new 24V locks in the same building.
- Individual 3A fuses per lock and auxiliary circuit: This is not a distributed relay board with a single input fuse. Each of the 16 outputs is protected independently. A fault on circuit four will not trip circuits one, two, or three. In a 20-door facility, that means 19 doors stay operational while you fix one short.
- 250W capacity with 8A (24V) or 4A (12V) ceiling: Sufficient for typical electric strike and mag lock loads across eight zones. A standard electric strike draws 0.8–1.2A momentarily and holds at ~0.5A; eight strikes will fit easily within the 8A budget if you use a door controller with timed unlock logic (not held open continuously).
Deployment Considerations:
- Size your load carefully. If you sum eight strikes at full hold current (0.5A each = 4A) plus auxiliary motion sensors (0.1A each), you're already pushing against the 8A ceiling. A brief overload from a sensor short will blow the 3A fuse on that circuit—by design—but sustained overload across multiple circuits could trip the main supply. Total connected current (sum of everything) must stay below 4A (12V) or 8A (24V).
- This supply has no battery backup. If your access control system requires hold-up power during AC mains failure, you must add a separate UPS or battery module. Many access control installations include 12 or 24V battery packs for this reason—do not assume this supply will keep locks energized when the building loses power.
- Install in a climate-controlled electrical room, not outdoors or in an unheated garage. The enclosed E4M enclosure is rated for indoor use. Moisture and temperature swings will shorten the life of the board and fuses.
For warehouse automation with multiple conveyor gate solenoids, personnel access locks, and sensor circuits, the FPO250-B100C8D8E4M is a solid, isolation-focused choice. It's not the lowest-cost supply, and it's not aimed at single-door garage door openers. It's built for integrators who understand that circuit isolation prevents cascading failures and reduces on-site troubleshooting time. Size your load, fuse your circuits, and you will have fewer 2 a.m. calls.
