Omron E3X-NA11 2M — NPN Fiber Amplifier, Potentiometer
SKU: E3X-NA11 2MUSD 22.00
E3X-NA series digital fiber amplifier with NPN open-collector output, 4-turn potentiometer sensitivity adjustment, and 5-level LED bar display. 200 us response time, 12-24 VDC supply, IP50 body, 10x31.5x64.3 mm slim housing, 2 m pre-wired cable.
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Product Overview
The E3X-NA11 2M is Omron's standard NPN-output fiber amplifier for the E3X-NA series — the workhorse fiber-optic sensor for general-purpose detection in factory automation. The 'NA' designation refers to the analog bar display with 4-turn potentiometer sensitivity adjustment (the lower-cost alternative to the E3X-SD with digital display + pushbuttons, and the E3X-HD with advanced teach + EtherCAT). The '11' suffix encodes NPN open-collector output (vs '41' = PNP, already done in our catalog). The 200 us response time is the standard speed for general-purpose counting, position detection, and presence sensing — for 5x faster response (20 us), the E3X-NA11F high-speed variant is the right pick.
Decoding E3X-NA11 2M within the E3X-NA family
The E3X-NA@@ model code has multiple positional digits that encode output type, response time, and environmental rating. The '1' in NA11 = NPN output (vs '4' = PNP). The '1' (second position) = standard 200 us response (vs 'F' = 20 us high-speed, 'V' = water-resistant IP66). The '1' (third position) = analog potentiometer (vs '21'/'51' = self-diagnosis function). The '6' or '8' final suffix = wire-saving connector (vs '1'/'2' final = pre-wired 2 m cable). The E3X-NA11 2M codepoint thus decodes as NPN, standard 200 us, with potentiometer, pre-wired 2 m.
Sensitivity adjustment with the 4-turn potentiometer
The E3X-NA11 2M uses a 4-turn potentiometer for sensitivity adjustment, with mechanical clutches at both ends to prevent damage if the pot is turned past its stops. To set the sensitivity: (1) present the target to the fiber optic sensor, (2) turn the potentiometer clockwise until the operation indicator (orange LED) lights AND the green 'stability' LEDs on the bar display show adequate excess gain, (3) remove the target and turn the potentiometer counter-clockwise until the operation indicator goes off, (4) set the potentiometer halfway between the on and off positions for the optimum threshold.
Fiber optic cable compatibility — E32 series
The E3X-NA11 2M accepts any E32-series fiber optic cable via the standard E3X-CN@@ connector on the front face. The E32 family includes 100+ fiber variants: (a) Through-beam (E32-T11, E32-T12, E32-T14, etc.) — emitter + receiver pair for long-range (up to 3 m) detection of opaque objects, ideal for part-counting on a conveyor. (b) Diffuse-reflective (E32-D11, E32-D12, E32-D14, etc.) — single fiber that detects light reflected from the target, ideal for short-range (5-100 mm) presence detection. (c) Retro-reflective (E32-R16, etc.) — single fiber that detects light reflected from a separate reflector (E39-R1S, etc.), ideal for shiny or transparent targets.
Key Features
- E3X-NA series digital fiber amplifier
- NPN open-collector output
- 200 us operate/reset response time
- 12 to 24 VDC +/-10% power supply, 35 mA max current consumption
- 4-turn potentiometer sensitivity adjustment with mechanical clutch
- 5-level LED bar display
- Light-ON / Dark-ON operation mode selectable via wiring
- Red 4-element LED light source
- SKU: E3X-NA11 2M
- Series: E3X-NA Digital Fiber Amplifier
- Voltage: 1 V
- I/O: 0 I/O
Best-Fit Applications
- Small-part detection on a vibratory feeder bowl - E3X-NA11 2M paired with an E32-D12 diffuse-reflective fiber detects 1-5 mm metal.
- Label detection on a bottling line - E3X-NA11 2M with an E32-@G@ green-LED mark-detecting fiber discriminates the printed label from.
- Coin counting in a vending machine - E3X-NA11 2M with an E32-T11 through-beam fiber counts coins as they pass through.
- PCB component presence check - E3X-NA11 2M with an E32-D14 small-spot diffuse fiber verifies that surface-mount components are present on.
Buying Checklist
- Pick E3X-NA11 2M for NPN fiber amplifier with potentiometer and 2 m cable - standard NPN fiber amp for NPN-input PLCs
- Pick E3X-NA41 2M for PNP fiber amplifier with potentiometer - for PNP-input PLCs
- Pick E3X-NA11F 2M for NPN high-speed 20 us - for high-speed counting at 1 kHz+ rates
- Pick E3X-NA41F 2M for PNP high-speed 20 us - high-speed PNP amplifier
- Pick E3X-NA11V 2M for NPN water-resistant IP66 - for washdown or outdoor environments
- Pick E3X-NAG11 2M for NPN mark-detecting green LED - for color-mark discrimination on labels
Technical Specifications
| Model | E3X-NA11 2M |
|---|---|
| Series | E3X-NA Digital Fiber Amplifier |
| Type | Fiber amplifier, NPN output, potentiometer, 2 m cable |
| Output Type | NPN open-collector (sinking) |
| Output Configuration | Light-ON / Dark-ON selectable via wiring (white wire to +V for Light-ON, to 0V for Dark-ON) |
| Load Current | 50 mA max |
| Residual Voltage | 1 V max (at 50 mA load) |
| Load Supply Voltage | 26.4 VDC max |
| Power Supply Voltage | 12 to 24 VDC +/-10%, ripple p-p 10% max |
| Current Consumption | 35 mA max at 24 VDC |
| Display | 5-level LED bar (4 green + 1 red excess-gain indicator) + operation indicator (orange LED) |
| Compatible Fiber Series | E32-T@@@ (through-beam), E32-D@@@ (diffuse), E32-R@@@ (retro), E32-A@@@ (area), E32-@5@ (chemical), E32-@H@ (heat 200 C), E32-@R@ (oil), E32-@V@ (vacuum) |
| Through-Beam Sensing Distance | Up to 3 m (with E32-T11 fiber) |
| Diffuse-Reflective Sensing Distance | Up to 100 mm (with E32-D12 fiber on white paper 100x100 mm) |
| Retro-Reflective Sensing Distance | Up to 200 mm (with E32-R16 fiber and E39-R1 reflector) |
Resources & Downloads
FAQ for E3X-NA11 2M
What's the difference between E3X-NA11 2M and E3X-NA41 2M?
Both are E3X-NA series digital fiber amplifiers with the same potentiometer sensitivity adjustment, same LED bar display, same fiber-optic compatibility (E32 series), same IP50 body, same 12-24 VDC power supply, same 35 mA consumption, and same 10x31.5x64.3 mm housing. The only difference is the output type: E3X-NA11 2M (this SKU) is NPN open-collector (sinks current to 0V when output is ON), E3X-NA41 2M (already done) is PNP open-collector (sources current from +V when output is ON).
What fiber optic cables can I use with the E3X-NA11 2M?
The E3X-NA11 2M accepts any E32-series fiber optic cable via the standard E3X-CN@@ connector on the front face. The E32 family is Omron's fiber optic cable line with 100+ variants in several categories: (a) Through-beam (E32-T@@@) - emitter + receiver pair, 50 mm to 3 m sensing range; models include E32-T11 (standard 1 m), E32-T12 (long-range 3 m), E32-T14 (right-angle), E32-T16 (screen fiber for sheet detection), E32-T51 (chemical-resistant Teflon jacket), E32-T61 (heat-resistant 150 C).
How do I set the sensitivity on the E3X-NA11 2M?
Set the sensitivity on the E3X-NA11 2M using the 4-turn potentiometer on the front face. Procedure: (1) Present the target to the fiber optic sensor at the actual operating distance. (2) Turn the potentiometer clockwise until the operation indicator (orange LED) lights AND the green 'stability' LEDs on the 5-level bar display show adequate excess gain (typically 2-4 green LEDs lit).
Can the E3X-NA11 2M detect clear or transparent objects?
The standard E3X-NA11 2M with a diffuse-reflective fiber (E32-D@@@) CANNOT reliably detect clear or transparent objects (clear glass, transparent films, PET bottles) because the light passes through the target rather than reflecting back. For transparent objects, use: (a) Retro-reflective fiber (E32-R@@@) with a separate reflector (E39-R1 or E39-R1S) - the fiber detects light bouncing off the reflector; when a transparent object is in the beam path, some light is refracted/reflected away and the sensor triggers.
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