Omron E3K Monitored Photoeye Kit for Automatic Gates

Long-Range Monitored Photoeye for Automatic Gate Entrapment Protection

The Omron E3K-R10K4-NR Photoeye is a heavy-duty retroreflective sensor configured for monitored automatic gate applications. The Elite E3K version incorporates a 10kΩ monitored circuit, allowing compatible gate operators to supervise the photoeye connection and detect a fault in the safety circuit.

Using a single sensor and reflector, the E3K provides a sensing distance of up to 10 meters (32.8 ft) with the included E39-R1 reflector. When the infrared beam between the sensor and reflector is interrupted by a vehicle, person, or other obstruction, the relay changes state so the connected gate operator can respond according to its programmed safety function.

The E3K is well suited to outdoor gate installations with its IP67 and NEMA 4X-rated enclosure, wide 24-240 VAC/VDC power range, adjustable sensitivity, selectable Light-ON/Dark-ON operation, and built-in interference protection. The sensor also includes status LEDs to assist with alignment, setup, and troubleshooting.

Key Features

• 10kΩ monitored photoeye for compatible automatic gate operators
• Retroreflective design uses one sensor and one reflector
• Up to 32.8 ft (10 m) sensing distance with included E39-R1 reflector
• Wide 24-240 VAC or 24-240 VDC operating range
• Adjustable sensitivity for site-specific alignment
• Selectable Light-ON or Dark-ON operation
• Pulse-modulated infrared sensing helps resist optical interference
• Built-in mutual interference protection
• Red, green, and yellow LED indicators assist with alignment and diagnostics
• DPDT relay output
• IP67 and NEMA 4X environmental protection
• Terminal-block wiring for field installation
• Includes reflector and mounting bracket
• Suitable for residential, commercial, and industrial automatic gate applications

Technical Specifications

• Manufacturer: Omron
• Model: E3K-R10K4-NR
• Product Type: Monitored retroreflective photoelectric sensor
• Application: Automatic gate entrapment protection and obstruction detection
• Monitoring Method: 10kΩ resistive monitoring
• Detection Method: Retroreflective
• Sensing Distance: Up to 10 m / 32.8 ft with E39-R1 reflector
• Power Input: 24-240 VAC, 50/60 Hz; 24-240 VDC
• Power Consumption: 10 VA maximum
• Light Source: Pulse-modulated infrared LED, 950 nm
• Operation Mode: Selectable Light-ON / Dark-ON
• Sensitivity: Adjustable
• Control Output: DPDT relay
• Maximum Relay Load: 10A at 240 VAC
• Minimum Relay Load: 1 mA at 5 VDC
• Response Time: 30 ms maximum ON / OFF
• Indicators: Red incident-light LED, green stability LED, yellow output-operation LED
• Interference Protection: Mutual interference protection
• Connection: Plated steel screw terminals
• Conduit Connection: 3/4-14 NPT
• Enclosure Rating: IP67; NEMA 1, 4, 4X, 12, and 13
• Operating Temperature: -13°F to 131°F (-25°C to 55°C)
• Approximate Dimensions: 7.32" H x 3.50" W x 2.48" D
• Included Reflector: Omron E39-R1
• Included Mounting Bracket: Omron E39-L37
• UL 325 Use: Must be connected to a gate operator that supports the sensor's monitoring method and installed according to the operator manufacturer's approved entrapment protection requirements

Available Configurations

• Full Kit Without Housing
• Full Kit With Housing

Conclusion

The Omron E3K-R10K4-NR combines 10kΩ monitoring, long-range retroreflective detection, outdoor-rated construction, and a wide power input range for automatic gate safety applications. Its adjustable sensitivity and visual indicators also make alignment and field troubleshooting easier for installers.

When using the E3K as monitored entrapment protection, confirm that the specific gate operator supports 10kΩ monitored photoeyes and follow the operator manufacturer's required wiring and placement instructions. A monitored photoeye is one component of the overall UL 325 entrapment protection system and does not by itself establish compliance for the entire gate installation.