ER2-22N Fiber Optic controller
Key Specifications

• Brand/Model: BOJKE ER2-22N (NPN Type)
• Output Type: NPN switching output (complementary PNP variant is ER2-22P)
• Power Supply: 12–24 VDC (<40 mA current consumption)
• Light Source: Red LED (650 nm wavelength)
• Response Time: 100 µs (P1 mode) to 200 µs (P2 mode)
• Display: Dual digital number display (max detection value up to 9999)
• Mounting: DIN track or wall-mounted
• Operating Temperature: -25°C to +55°C 

Main Features

• Threshold & Timing: Manual and quick threshold adjustment with programmable output delays (1–9999 ms). 
• Modes: Light-on/dark-on (L-on/d-on), NO/NC switchable outputs, and frequency selection (F1–F4) to prevent mutual interference. 
• Safety & Security: Features key lock/unlock protection and a compact footprint (approx. 15 x 12 x 3 cm, 0.1 kg).

If you need help with wiring diagrams, PLC compatibility (NPN vs. PNP), or troubleshooting error codes, let me know your specific setup.