Omron Inductive Proximity switch E2B-M12LS04-WP-B1 WP-C1 E2B-M12LS04-WZ-C1 WZ-C2

Omron inductive proximity switch E2B-M12LS04-WP-B1 WP-C1 E2B-M12LS04-WZ-C1 WZ-C2

1. General Description – E2B Series

The Omron E2B series is a general-purpose inductive proximity sensor line designed for reliable detection of metal objects in industrial automation environments.

These sensors operate by generating a high-frequency electromagnetic field at the sensing face. When a metal object enters the sensing range, the electromagnetic field is disturbed, causing the output to switch state.

They are widely used for:

• Metal part detection

• Position sensing

• End-of-travel detection

• Counting metal components

• Machine automation feedback

2. Common Technical Specifications (E2B-M12LS04 Base Model)

The “M12” indicates a 12 mm diameter threaded body.
The “LS04” indicates approximately 4 mm sensing distance.

Because this is a flush (shielded) type, it can be mounted flush with metal surfaces without affecting detection stability.

3. Model Differences and Output Types

The difference between WP and WZ versions primarily relates to output polarity and wiring configuration.

A) E2B-M12LS04-WP-B1

• Output type: NPN

• Switching mode: Normally Open (NO)

• Wiring: Pre-wired cable

• Typical application: PLC systems configured for sinking inputs

B) E2B-M12LS04-WP-C1

• Output type: NPN

• Wiring configuration variant (connector or cable specification differs from B1)

• Same sensing distance: 4 mm

• Same mechanical size: M12

C) E2B-M12LS04-WZ-C1

• Output type: PNP

• Switching mode: Normally Open (NO)

• Wiring: Typically connector type

• Used for PLC systems requiring sourcing inputs

D) E2B-M12LS04-WZ-C2

• Output type: PNP

• Connector or wiring configuration variant

• Same sensing and mechanical characteristics

4. NPN vs PNP Output Explanation

NPN Output:

• When the sensor detects metal, the output switches to 0 V (ground).

• Used with PLC inputs configured as sinking type.

PNP Output:

• When the sensor detects metal, the output switches to +24 V.

• Used with PLC inputs configured as sourcing type.

It is critical to match the sensor output type with the PLC input configuration.

5. Electrical Wiring (Typical 3-Wire DC Sensor)

Standard wire colors:

Brown → +24 VDC
Blue → 0 V (GND)
Black → Output signal

Incorrect polarity connection may damage the sensor.

6. Installation Considerations

• Maintain proper mounting torque on the M12 threaded body.

• Ensure no unintended metal objects are within sensing range.

• Confirm the target size is sufficient to achieve full sensing distance.

• For flush types, follow recommended installation spacing from adjacent sensors.

7. Typical Industrial Applications

These sensors are suitable for:

• Conveyor metal detection

• Metal bracket presence verification

• Machine tooling position feedback

• Robotic fixture detection

• End-stop detection in automation equipment

8. Summary Comparison

All models are electrically similar except for output polarity and connection style.