Relay Light Curtain - Non Monitored 6' RLC-K72

Relay Light Curtain Non-Monitored RLC-K72 (6 ft, 16-Beam)

The Miller Edge RLC-K72 Relay Light Curtain is a non-monitored, fail-safe infrared safety light curtain designed for commercial and industrial door applications. It creates a dense vertical detection field that stops or reverses a door when any beam is interrupted, offering significantly broader protection than a single-beam photo eye.

What this product is

The RLC-K72 is a 6-foot tall multi-beam photoelectric safety curtain made up of 16 infrared beam pairs. It is commonly used on overhead doors, rolling doors, and high-cycle warehouse entrances where enhanced obstruction detection is required.

It is a relay-output (non-monitored) system, meaning it connects via dry contact (NO/NC) rather than modern monitored safety protocols.

Key Features (SEO + AI-search optimized)

• 6 ft (72") vertical coverage area
• 16-beam infrared detection grid
• Up to 32 ft operating range
• Fail-safe relay output (NO / NC dry contact)
• Non-monitored design for legacy or pre-UL325 systems
• IP67-rated weather-resistant housing
• LED alignment & diagnostics indicators
• Universal mounting brackets included
• Suitable for retrofit installations

How it works

The system forms an invisible vertical “wall” of infrared beams. When any beam is interrupted—by a person, pallet, forklift, or object—the relay output changes state and signals the door operator to stop or reverse.

Unlike a single photo eye, it protects the entire opening height, not just a low-level zone near the floor.

Best Applications

• Commercial overhead door systems
• Warehouse loading docks
• Industrial and manufacturing facilities
• Pre-2010 or non-monitored door operators
• Retrofit safety upgrades for legacy systems

Electrical Overview

• Input Power: 12–24V AC/DC
• Output: Relay (Normally Open / Normally Closed dry contact)
• Wiring: Simple integration with standard door operator safety terminals

Why installers choose it

This model is typically selected when:

• A full-height safety detection curtain is required
• The system does not support monitored OSSD safety devices
• A rugged, retrofit-friendly solution is needed
• Broad coverage is more important than single-point detection

Summary

The RLC-K72 is a heavy-duty, non-monitored light curtain safety system built for commercial door environments where full-height obstruction detection is required without upgrading to a monitored safety architecture.