HES WEMB-CL-42 Electro-Mechanical Bar 42in Clear
The HES WEMB-CL-42 is a 42-inch electro-mechanical bar designed for commercial access control and high-traffic facility entry points. The clear finish preserves door visibility while the electro-mechanical mechanism integrates seamlessly with door-release controllers and badge readers. This product handles sustained daily use in multi-tenant buildings, healthcare facilities, and institutional environments where retrofit compatibility and reliable solenoid-driven operation are non-negotiable.
Key Features
- 42-inch Length: Fits standard commercial doorways (36–42 inch frames). Retrofit-compatible with existing frame hardware; no structural modification required.
- Clear Finish: Transparent design preserves sight lines through the door while the electro-mechanical bar remains operational and durable.
- 30VDC Operation: Standard access control voltage — compatible with most commercial card readers, keypads, and standalone solenoid-release controllers without additional power conditioning.
- Electro-Mechanical Design: Proven solenoid-latch mechanism; fewer moving parts than fully mechanical bars reduces maintenance cycles in high-traffic settings.
- High-Traffic Rated: Engineered for 500+ daily cycles without functional degradation. Common in healthcare, education, and office-tower environments.
- Standard Frame Installation: Mounts directly into commercial hollow-metal or wood door frames using industry-standard strike hardware. No special adapters or door modifications.
Integration and Deployment
The WEMB-CL-42 integrates into access control systems via standard 30VDC wiring from a card reader controller or intercom release circuit. It does not require ONVIF, IP connectivity, or network configuration — the bar operates as a fail-safe electro-mechanical relay. This simplicity is a significant advantage in retrofit scenarios where running new network cabling is costlier than adding 24–30VDC power runs. Pair it with a six-pin or eight-pin relay module on your access control panel to control entry/exit or emergency egress sequencing.
Installation takes 30–45 minutes on a standard door. Align the bar latch with the strike plate, secure the mounting bracket to the frame, and wire the solenoid coil to your controller. Power consumption is minimal (typically <2W at 30VDC when energized), making it viable for PoE-to-24VDC converters if your infrastructure already supports Ethernet delivery. Test the strike before live operation: a sluggish latch release often indicates worn strike geometry or insufficient solenoid voltage — verify panel output before troubleshooting the bar itself.
The clear finish supports visual inspection of latch position and wear — facility managers can quickly assess whether the mechanism requires lubrication or adjustment without disassembling the door hardware. This transparency is especially valuable in healthcare and educational facilities where maintenance staff need to perform walkthroughs without tools. Over 3–5 years of daily operation, expect wear on the strike plate and occasional solenoid coil replacement; parts availability through HES channels is good, and replacement cost is low relative to full bar replacement.
Compliance and Lifecycle
The WEMB-CL-42 meets UL 1034 for electro-mechanical strikes and complies with ADA accessibility requirements when paired with proper egress signage and emergency release buttons. It is manufactured in the United States and carries no country-of-origin restrictions for federal procurement (NDAA Section 889 compliant). Facilities in sensitive security contexts (government offices, military bases, research institutions) often prefer domestic-sourced access control hardware; HES's US production footprint is a material differentiator versus imported alternatives. For end-users evaluating total cost of ownership, the bar's low power draw (no heater, no active cooling), simple wiring, and proven electro-mechanical reliability translate to minimal operational overhead. If your facility already deploys HES exit devices, strike plates, and latch hardware, standardizing on the WEMB-CL-42 reduces spare-parts inventory and integrator training time.
Marty AllisonPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
We've deployed hundreds of HES electro-mechanical bars across office parks, hospitals, and data centers, and the WEMB-CL-42 remains a workhorse in retrofit projects. The 42-inch form factor covers the vast majority of commercial doorways without requiring site-specific engineering, and the clear finish is a practical choice for facilities where facility managers need to see latch position at a glance. In our experience, the bar's simplicity — purely electro-mechanical, no electronics, no network dependency — is both its strength and its constraint. It will never fail due to a firmware bug or a lost WiFi connection, but it also won't talk back to your access control system or send alerts when someone forces entry. For perimeter security or sensitive server-room doors, that's acceptable trade-off. For a high-volume corporate lobby where you need real-time audit trails and anomaly detection, you'd be looking at a smart electronic strike paired with a networked controller instead. The bar is rated for high-traffic — 500+ daily cycles without wear-out — and we've seen units survive 10+ years in healthcare environments. Maintenance is minimal: occasional lubrication on the latch pivot, and strike-plate replacement every 5–7 years if the facility is truly high-traffic. Power consumption is trivial (<2W), so it plays well with legacy 24–30VDC access panels as well as modern IP-centric installations.
Technical Highlights:
- 42-inch Bar Length: Covers all standard commercial door frames from 36–42 inches. Retrofit applications need no door modification, just wiring. Frame-mounted strike plate is included.
- 30VDC Solenoid Operation: Direct compatibility with analog access control panels, card reader outputs, and intercom release circuits. No power supply conversion required; draws <2W during actuation.
- Clear Finish: Maintains visibility of the latch mechanism and allows facility staff to inspect wear or misalignment without disassembly. Aesthetic appeal in customer-facing areas without compromising visibility.
- Electro-Mechanical Design (No Electronics): No firmware, no WiFi, no microprocessor — reliability is mechanical only. Fail-safe defaults can be configured at the controller level (e.g., locked on power loss, or energized-to-unlock for emergency egress).
- US Manufactured: Domestic production — compliant with NDAA Section 889, federal procurement, and foreign-restriction environments. Spare-parts sourcing is direct through HES supply channels.
Deployment Considerations:
- Electro-mechanical operation means no real-time audit trail or integration with VMS or access control software. If forensic entry logging is required, you'll need a separate controller that logs relay actuation upstream.
- Strike-plate geometry matters: worn or misaligned frames lead to sluggish latch release or full solenoid stall. Inspect frame condition and strike alignment before installation; retrofit projects often reveal bent or corroded strike hardware.
- High-traffic environments (500+ daily uses) will see strike-plate wear; plan for replacement every 5–7 years. Keep a spare strike plate on hand during maintenance windows.
- Pair with ADA-compliant egress signage and emergency release buttons if the bar is on a life-safety exit. Code enforcement and insurance carriers will require explicit manual override capability.
- Wiring runs should be shielded (twisted pair, grounded) if the bar is near RFID readers or cellular equipment. Solenoid coil noise can couple into unshielded card reader circuits.
The WEMB-CL-42 is the right choice for integrators building retrofit access control systems on legacy analog infrastructure, or for facilities that prioritize simplicity, reliability, and US sourcing over real-time audit capabilities. If your facility is already invested in HES hardware (exit devices, strikes, latches), standardizing on this bar will streamline maintenance and spare-parts management. Explore the full HES catalog for complementary strike hardware and electro-mechanical door control solutions.
