LV-N12N Keyence Digital Laser Sensor Amplifier – Cable Type Expansion Unit
Model: LV-N12N | Brand: Keyence | Series: LV-N series
This digital laser sensor amplifier is a cable-type expansion unit for the LV-N series. It delivers fast response, flexible timer functions, and stable performance for industrial automation. The unit supports LIGHT-ON/DARK-ON selection, one control output, and one external input. It has no built-in network port. You can add NU series network units for communication. The amplifier is active in Keyence production as of September 2026.
Why Buy From Oiltech Controls?
- 15+ years in industrial automation spare parts
- Global shipment support
- Tested industrial surplus and refurbished options
- 12-month warranty on every unit
- Technical verification before shipment
- Support for obsolete control systems
Questions? Email info@oiltechcontrols.com or message us on +86 158 8020 0923 (WhatsApp).
Technical Specifications
| Brand | Keyence |
| Model | LV-N12N |
| Series | LV-N series |
| Product type | Digital laser sensor amplifier |
| Type | Expansion unit |
| Cable/connector | Cable type |
| Output selection | LIGHT-ON / DARK-ON (switch-selectable) |
| Control outputs | 1 output |
| External input | 1 input |
| Monitor output | None |
| Timer function | OFF / OFF-delay / ON-delay / One-shot; 1 ms to 9,999 ms; ±10% max error |
| Response time | 80 µs (HIGH SPEED) / 250 µs (FINE) / 500 µs (TURBO) / 1 ms (SUPER) / 4 ms (ULTRA) / 16 ms (MEGA) |
| Unit expansion | Up to 17 units total (2-output type counts as 2 units) |
| Interference prevention | 0 to 4 units, depends on mode and sensor head |
| Supply voltage | 24 VDC nominal (10 to 30 VDC, ripple P-P 10% max) |
| Power consumption | 830 mW max normal (at 30 V); 30 mA at 24 V |
| Output type | NPN open collector |
| Control output rating | NPN open collector 30 V, residual voltage 1 V or less; 100 mA max per output |
| Protection circuit | Reverse polarity, over-current, surge absorber |
| Operating temperature | -20 to +55 °C (No freezing; derating applies with multiple units) |
| Relative humidity | 35 to 85 % RH (No condensation) |
| Protection rating | Not available |
| Vibration resistance | 10 to 55 Hz, double amplitude 1.5 mm, 2 hours in each X, Y, Z direction |
| Shock resistance | 500 m/s², 3 times in each X, Y, Z direction |
| Dimensions (H×W×D) | 32.6 × 9.8 × 78.7 mm |
| Weight | Approx. 65 g |
| Case material | Polycarbonate |
| Cable material | PVC |
| Built-in ports | None |
| Protocols | None (network compatible via NU series units) |
| Communication expansion | NU series network units available separately |
| Lifecycle | Active; official Keyence production status confirmed |
Installation Guide
Mount the LV-N12N on a DIN rail. Use the cable-type connection for power and signal. Keep the unit away from heat, moisture, and strong vibration. Do not exceed 55 °C ambient temperature. When you stack multiple units, apply derating. Connect the external input for timing or reset functions. Set LIGHT-ON or DARK-ON with the switch before power-up. For network use, add an NU series unit separately. No special tools are needed. The compact size (9.8 mm wide) saves panel space.
Debugging and Maintenance
Use the timer settings to match your machine cycle. Response time is selectable from 80 µs to 16 ms. This helps you balance speed and noise immunity. The unit has reverse polarity, over-current, and surge protection. Check wiring if the output does not switch. Clean the cable and connectors with a dry cloth. Do not open the case. There are no user-serviceable parts inside. The NPN open collector output drives relays, PLC inputs, or counters. For unstable readings, adjust the interference prevention mode. This reduces crosstalk between units. Always verify the sensor head matches the amplifier settings. No monitor output means you need an external meter for live signal checks.
Compatibility Notes
The LV-N12N works as an expansion unit in the LV-N series. It connects to a main amplifier unit. You can expand up to 17 units total. A 2-output type counts as 2 units. The unit has no built-in network port. For Ethernet, PROFINET, or other protocols, use NU series network units. The NPN output is common in Asian and global automation systems. It is not a PNP type. Check your PLC input card before wiring. The cable type is fixed; it is not a connector type. This unit replaces or extends existing LV-N series setups. It does not include a sensor head. You must order the head separately.
Certification and Packaging
This product carries Keyence production status. Official certification details are available on the Keyence product page. The package includes 1 LV-N12N amplifier unit, 1 cable, and a quick guide. No sensor head, no mounting bracket, and no power supply are included. Warranty: 12 months from Oiltech Controls. We ship by FedEx, UPS, or DHL. You can track your order online. Contact us for bulk or urgent shipments.
Typical Applications
- Presence detection on conveyors
- Part counting in packaging lines
- Position sensing on small assembly machines
- Edge detection for web materials
- Obsolete control system upgrades
- High-speed sorting with 80 µs response
Diagnostic Capability
The LV-N12N gives basic diagnostics through its output and timer behavior. It has no digital display or monitor output. You can check power at the cable terminals. If the output stays ON or OFF, verify the LIGHT-ON/DARK-ON switch. Test the external input for proper signal. Use an oscilloscope or meter on the output line. The protection circuits prevent damage from wiring errors. For system-level diagnostics, add an NU series network unit to read status over the network. The timer error is ±10% maximum. This helps you plan maintenance windows.
FAQ
Q: Is this a complete sensor?
A: No. It is an amplifier unit. You need a compatible LV-N series sensor head.
Q: Can I use this without a main unit?
A: No. It is an expansion unit. It must connect to a main amplifier.
Q: Does it have Ethernet or IO-Link?
A: No. Add an NU series network unit for network communication.
Q: What is the warranty?
A: 12 months from Oiltech Controls.
Q: How fast is the response time?
A: As fast as 80 µs in HIGH SPEED mode. You can slow it to 16 ms for noisy environments.
Q: What output type is it?
A: NPN open collector, 30 V, 100 mA maximum.
Q: Do you ship worldwide?
A: Yes. We use FedEx, UPS, and DHL. Contact info@oiltechcontrols.com or +86 158 8020 0923.
Copyright © 2026 Oiltech Controls Limited. All rights reserved.
Original Source: https://www.oiltechcontrols.com/
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