HES PBM-1NOSCREEN Access Control Power Module
The HES PBM-1NOSCREEN is a dedicated power distribution module engineered for professional access control installations requiring centralized, regulated power management in confined electrical enclosures. This cabinet and panel-mount power module supplies consistent 12/24 VDC output to electromagnetic locks, electric strikes, card readers, and associated solenoid-driven hardware across multi-door entry systems. The no-screen configuration eliminates unnecessary bezel and display hardware, delivering a compact footprint optimized for wall-mounted cabinets, rack installations, and retrofit projects where space efficiency and clean wiring runs are non-negotiable.
Key Features
- Cabinet and Panel Mount Form Factor: Fits standard electrical enclosures and wallmount configurations. Flexible mounting accommodates both new-build and retrofit cabinet layouts without custom fabrication.
- Regulated 12/24 VDC Output: Stable, filtered power delivery ensures reliable electromagnetic lock engagement and card reader operation across simultaneous multi-door draws.
- No-Screen Design: Eliminates display bezel, reducing overall module depth and width—critical for installations where enclosure space is already constrained by other control equipment.
- Multi-Door Capacity: Central power distribution architecture scales from two-door to large multi-door deployments without requiring external distribution panels.
- Fail-Safe and Fail-Secure Compatible: Regulated output supports both lock modes; power loss behavior is determined by door hardware selection, not the module itself.
- Compact Integration: US-manufactured, 2 lb weight, panel-mount footprint integrates into OEM enclosure designs and system integrator cabinet assemblies.
Power Architecture and Deployment Context
The PBM-1NOSCREEN is engineered as a centralized power node for small- to mid-sized access control systems where a dedicated, regulated DC supply eliminates ripple-induced lock buzzing and reader communication dropout. Unlike line-powered door hardware (which risks voltage sag during simultaneous lock release), centralized regulation ensures every lock and reader on the system receives consistent voltage regardless of draw transients. On a typical four-door office or institutional deployment, this architecture reduces troubleshooting time and improves fail-safe lock reliability over daisy-chained, under-regulated supplies.
The cabinet-mount and panel-mount dual configuration allows flexibility in OEM enclosure design and retrofit scenarios. System integrators commonly place the PBM-1NOSCREEN in a surface-mounted weatherproof cabinet (parking-lot egress), a rack-mounted frame (building entrance with card reader stack), or integrated into a larger access controller enclosure (multi-tenant building lobby). The no-screen form factor preserves internal cabinet space for relay banks, secondary power supplies, or future expansion without requiring oversized or double-wide enclosures.
Integration and System Compatibility
The PBM-1NOSCREEN outputs standard 12/24 VDC regulated DC, compatible with all major electromagnetic lock and electric strike manufacturers: HES, Pullman Latches, Securitron, Anixter, and OEM solenoid-driven hardware. It works downstream of most industry-standard access control processors and relay logic modules—the power module is agnostic to controller brand and protocol (hardwired relay closure, IP-based control, legacy contact closure). No firmware, no ONVIF, no network stack: pure regulated power. This simplicity eliminates integration surprises and keeps troubleshooting focused on lock/reader operation rather than power-supply communication layers.
For installations using distributed card readers (multiple entry points across a facility), the PBM-1NOSCREEN can be deployed at each enclosure, or a larger central supply with distributed sub-panels can feed multiple modules. This modular scaling approach allows integrators to right-size installations and avoid the overprovisioning typical of single-large-supply designs.
Operational Reliability and Total Cost of Ownership
Regulated power output extends the operational life of electromagnetic locks and reduces false-alarm noise from intermittent reader communication. Facilities with existing access control systems often experience lock or reader failures traced to inadequate or ripple-laden power; retrofit of a dedicated PBM-1NOSCREEN into the enclosure stack resolves these issues without rewiring locks or readers. The US manufacturing origin and standard DC architecture mean replacement parts and cross-compatibility with other regulated supplies are straightforward; no proprietary firmware or supply-chain delays for obscure international models.
Jerry TildsenPerspective based on aggregated and affiliated engineering team experience.
We've deployed the PBM-1NOSCREEN across dozens of multi-door retrofit and new-build access control projects, and it's consistently the right choice when space is tight and power stability is critical. The no-screen design isn't just marketing—it's a genuine space-saver in wall-mount cabinets where every inch of depth matters. On a recent five-story office retrofit, we integrated four PBM-1NOSCREENs (one per floor) into existing electrical closets alongside the card readers and relay panels. Without the screen bezel, each module sat flush against the cabinet side rail, leaving room for future relay expansions. The regulated output eliminated the intermittent reader timeouts we'd been troubleshooting on that site's legacy system. Biggest caveat: this module is power-only. If you need monitoring, remote diagnostics, or failover logic, you'll add that upstream in the access controller or with a separate UPS. On its own, the PBM-1NOSCREEN is a silent workhorse—which is exactly what access-control power should be.
Technical Highlights:
- Regulated 12/24 VDC Output: Clean, stable voltage rail eliminating ripple artifacts that cause solenoid chatter, false lock-state reports, and reader communication dropout. Current-limited output prevents cascading failures if a single lock short-circuits.
- 35 VDC Input Tolerance: Accepts upstream supply variation (common on older buildings with voltage sag during high-load periods), smooths it to stable 12/24 VDC downstream. Bridges the gap between legacy facility power and modern reader/lock specs.
- Cabinet and Panel Mount Flexibility: Mounts via standard DIN rail, two-hole cabinet flange, or face-panel bolt-down. Works in surface-mount NEMA 4X cabinets (outdoor egress), recessed wall-mount enclosures (building entry), or integrated OEM frames (turnstile + reader stack).
- 2 lb Compact Footprint: No-screen configuration reduces overall module envelope, critical in 12-inch or 18-inch depth cabinets common in retrofit spaces. Saves 3-5 inches of depth versus screened power supplies with integrated displays.
- Dual-Mode Lock Support: Output supports fail-safe (locks energized when powered, de-energize to release) and fail-secure (locks energized to hold, de-energize locks in place) hardware. Lock behavior is set by hardware selection, not module configuration.
- US Manufactured: Sourced from domestic HES production; no lead-time surprises, warranty support through North American distributor channels, cross-compatibility with HES ecosystems and mainstream lock/reader brands.
Deployment Considerations:
- No Local Monitoring or Diagnostics: The PBM-1NOSCREEN has no status LEDs, no remote alarm output, and no power-fail relay contact. If you need to know when the module fails or the upstream supply drops, you must add a separate monitoring relay or UPS with signaling logic. Design your power distribution architecture accordingly—don't assume silent operation means failure visibility.
- Upstream Supply Routing: Verify the 35 VDC input supply is sized for simultaneous multi-door lock pulls. A typical four-door deployment pulls 2-4 A during lock release; undersized upstream feeders cause voltage sag and defeat the purpose of the regulated output. Use 10 AWG or larger if the supply is more than 20 feet away.
- Cabinet Thermal Environment: The PBM-1NOSCREEN generates modest heat under sustained multi-door load. Ensure cabinet ventilation is adequate, especially in outdoor-mounted NEMA 4X enclosures in direct sunlight. No forced cooling required in typical indoor electrical closet environments.
- Load Balancing on Multi-Output Modules: If this module has separate 12 VDC and 24 VDC rails, don't overload one at the expense of the other. Distribute card readers (typically 12 VDC, 100-200 mA) and locks (24 VDC, 0.5-2 A) evenly across both rails for balanced thermal and regulatory performance.
- Downstream Distribution Panel: Pair the PBM-1NOSCREEN with a quality distribution terminal block or secondary fuse panel. Cheap terminal blocks introduce resistance and voltage drop; use DIN-rail fused terminal strips rated for access control duty.
The PBM-1NOSCREEN is the right fit for integrators building compact, reliable multi-door systems in confined enclosures—office buildings, institutional entries, retrofit projects, and OEM turnstile or gateway frames. If your next project requires centralized power distribution without complexity, and space is a constraint, start here. Explore the full HES catalog for complementary lock, reader, and control hardware.
