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Omron Retro-Reflective Photo Eye | E3K-R10K4-NR-1

Omron  |  SKU: E3K-R10K4-NR-1
$189.97
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Fits Overhead Door SEL and SEL+ operators.

Gives a commercial door or gate a working safety sensor, so it can close on a single press instead of someone holding the button down.

The sensor mounts on one side of the opening and bounces an infrared beam off a reflector on the other side. Wire only runs to one side. When something breaks the beam, the operator stops or reverses the door.

It runs on 24 to 240 volts, AC or DC, and has a full DPDT relay. That lets it work on older contactor-driven operators that were not built for two-wire sensors.

Specifications
Best Use Commercial
Hertz (Hz) 50/60 Hz
Length (In) 2 1/2"
Width (In) 3 1/2"
Height (In) 7 5/16"
Sensing method Retro-reflective
Sensing distance 33 ft (10 m) with included E39-R1 reflector; 40 ft (12 m) with a 3-inch reflector
Minimum detectable object 56 mm with E39-R1; 80 mm with a 3-inch reflector
Supply voltage 24–240 VAC ±10%, 50/60 Hz; 24–240 VDC ±10%
Power consumption 13.75 VA max (AC); 3.75 W max (DC)
Control output DPDT relay, 10 A at 240 VAC / 10 A at 28 VDC
Response time 30 ms max
Light source 950 nm pulse-modulated infrared LED
Directional angle Sensor 0.5° to 3°; reflector 40° min
Indicators Light incident (red), output stability (green), output operation (yellow)
Operation mode Light-ON / Dark-ON, switch selectable
Connections Screw terminal strip, 3/4-14 NPSM conduit hub
Enclosure UL Type 1
Operating temperature -13°F to 131°F (-25°C to 55°C)
Operating humidity 45 to 85% RH
Housing VALOX 553 PBT, PMMA lens, NBR seal, zinc-plated steel bracket
Depth with bracket 4 in
Weight 20.5 oz (580 g)
Approvals UL Recognized (file E333436); UL 325-2018 and CSA C22.2 No. 247-92 cRUus

Features
  • Wire runs to one side only. The reflector on the far jamb needs no power.
  • Universal 24–240 V AC or DC supply.
  • Full DPDT relay for older contactor-driven operators.
  • 10K resistor built in for UL 325 monitored inputs.
  • Light-ON or Dark-ON, set with a switch.

What's Included
  • (1) Omron E3K-R10K4-NR-1 retro-reflective photoelectric sensor
  • (1) E39-R1 reflector
  • (1) E39-L37 two-piece steel mounting bracket with hardware
  • (1) LY2-DC12 plug-in relay output module, installed

Compatible Operators
  • Overhead Door SEL
  • Overhead Door SEL+

Replaces

  • Direct replacement for an existing E3K-R10K4 or E3K-R10K4-NR
  • Also sold as the E3K-2018 through MMTC

How to check your operator

Open the operator's electrical box and find the wiring diagram inside the cover. Look for terminals labeled SE, sensing edge, photocell, or reversing device, and note the control voltage. Anything from 24 to 240 V, AC or DC, works.

Installation

Wiring methods

  • Traditional non-monitored (dry contact): for older operators with a plain sensing-device input. Power to terminals 7 and 8, safety relay to terminals 4 (NC2) and 6 (C2).
  • UL 325-2018 10K resistor method: power to terminals 7 and 8, safety relay to terminals 1 (C1) and 3 (NC1). The 10K resistor is built into this model, so there is nothing to add.
  • UL 325-2018 normally-closed method: power to terminal 7 (negative) and 8 (positive), safety relay to terminals 5 (NO2) and 6 (C2), with a jumper from terminal 6 to terminal 7.

Overhead Door Model SEL and SEL+: use the traditional non-monitored method. Overhead Door's external wiring diagram for these operators shows two-wire sensing devices landing across the C3 and SE terminals on the operator's control strip, and states that a sensing device should be installed if the door is to have momentary contact close. Without one, the operator has to be closed with constant pressure on the button. The SEL control circuit runs at 24 VAC off a 28 VAC 30VA transformer, well inside the E3K's supply range.

Mounting and setup

  • Disconnect power to the operator before wiring.
  • Mount the sensor and reflector at the same height on opposite sides of the opening, square to each other. The two-piece bracket gives a full 360° of horizontal rotation and tilts the sensor up to 45°; it secures with three 1/4-20 bolts at 120° spacing.
  • Terminals accept up to 14 AWG solid. Tighten to 9.8 in-lb (1.1 N-m).
  • Set the Light-ON / Dark-ON selector to Light ON for all three door and gate wiring methods.
  • Turn the sensitivity potentiometer to maximum, then confirm the green stability LED stays lit across the full opening with the door moving.
  • Do not run sensor wiring in the same conduit as line-voltage or motor leads. Use shielded cable if you have no choice.
  • Do not power an AC-supplied sensor from a variable-frequency drive or other high-frequency source.
  • The sensor needs 100 ms after power-up before it is live. If the sensor and the operator are on separate supplies, power the sensor first.

Warning: Impact damage can permanently compromise the housing seal. Mount it, don't drive it. Never use a constant-contact close to override a sensing device that isn't working, and test the reversal after installation and at every service call.

Questions

Do I need to run wire to both sides of the door?

No. Only the sensor is wired. The reflector on the opposite jamb needs no power.

Is the reflector included?

Yes. The E39-R1 reflector comes in the box, along with the mounting bracket and relay module.

What voltage does it need?

Anything from 24 to 240 volts, AC or DC. The Overhead Door SEL runs at 24 VAC, which is inside that range.

Can I use this outdoors?

We list it as an indoor sensor. Its only third-party enclosure listing is UL Type 1, and Omron's manual says not to use it in rain or outdoors. If you mount one on an exterior opening, keep it under cover, out of direct spray and direct sun, and add a reflector hood.
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