NPN Light-ON / Dark-ON Photoelectric Sensor – CDD-11N

The CDD-11N photoelectric sensor is designed for non-contact object detection in industrial machinery, production lines and automation systems.

This model uses Diffuse Reflective sensing technology. The sensor emits light and detects the light reflected directly from the target, eliminating the need for a separate reflector.

The CDD-11N features an NPN Open Collector output, operates on 12–24 VDC, and provides a nominal sensing range of approximately 10 cm, specified using a 100 × 100 mm white paper target. The operating mode can be selected between Light-ON and Dark-ON through the white control wire

The sensor uses a 4-wire connection:

• Brown: +12–24 VDC
• Blue: 0 V / GND
• Black: NPN Output
• White: Light-ON / Dark-ON selection

Operating mode selection:

• Light-ON: connect the white wire to Brown (+V) or leave the white wire open
• Dark-ON: connect the white wire to Blue (0 V)

Wiring Diagram:

+12...24 VDC
     │
     └──── BROWN

0 V / GND
     │
     └──── BLUE

NPN Output
     │
     └──── BLACK ──────> PLC Digital Input


OPERATING MODE SELECTION

LIGHT-ON:
WHITE ─────> BROWN / +V
or leave WHITE open

DARK-ON:
WHITE ─────> BLUE / 0V

As an NPN output sensor, the active output switches toward 0 V, so the PLC digital input must be suitable for NPN sensor operation.

Main Specifications:

• Model: CDD-11N
• Type: Photoelectric Sensor
• Sensing Method: Diffuse Reflective
• Output Type: NPN Open Collector
• Operating Mode: Selectable Light-ON / Dark-ON
• Power Supply: 12–24 VDC
• Sensing Distance: up to approx. 10 cm
• Number of Wires: 4
• Wire Colors: Brown, Blue, Black, White
• Maximum Output Current: 100 mA
• Response Time: max. 1 ms
• Current Consumption: max. 15 mA
• Housing Thread: M18 × 1
• Housing Material: Brass / metal
• Protection Rating: IP67
• Reverse polarity protection
• Short-circuit protection
• Sensitivity adjustment
• LED operation indicator

Typical Applications: product detection, object counting, positioning, packaging machines, filling machines, conveyor systems, production lines and PLC-based industrial automation.

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