Panasonic CX-421 (UCX421-Z) Photoelectric Sensor 12-24VDC for Universal Insertion Machine

I. Core Part Numbers and Specifications

1. Key Part Number Information

Part Number Type | Number Details | Description

Original Model | CX-421 | Panasonic official product model, near-field diffuse reflection photoelectric switch

Complete Order Number | UCX421-Z | Complete purchase model including 2m cable, same product as CX-421

Equipment Application | Suitable for near-field component/feeding inspection scenarios using Universal insertion machines and pick-and-place machines

2. Technical Parameters

Parameter Item | Specification Details

Detection Method | Diffuse Reflective

Rated Voltage | 12~24 VDC ±10%

Output Type | NPN Open Collector Output (Sink)

Detection Distance | 0~20 mm (Standard white paper reference, high sensitivity at close range)

Response Time | ≤1 ms

Light Source Type | Infrared LED

Cable Length | 2 m (standard configuration)

Operating Temperature | -25 ~ +55 ℃

Certifications | CE, UL, RoHS Certifications

Place of Origin China (Panasonic Sensors Suzhou Production)

II. Model Analysis

CX: Panasonic Standard Series Small Photoelectric Sensor Platform, emphasizing industrial-grade stability and compact design.

421: Model suffix, representing a short-range (20mm), high-sensitivity diffuse reflection configuration with a sensitivity adjustment knob.

UCX421-Z: Complete order number, the official model identifier for procurement/customs declaration, corresponding one-to-one with CX-421.

III. Application Scenarios in Insertion Machines

1. Core Uses

Close-range component detection: Detection of the position of small components near the insertion head, cutter/forming mechanism.

Feeder material detection: Detection of the presence/absence of components in the feeding channel to prevent missed insertion.

Mechanism position feedback: Detection of the position signal of close-range cylinders and push rods to ensure action accuracy.

2. Adaptability Advantages

Short-range high-sensitivity design, suitable for close-range detection scenarios in confined spaces inside insertion machines.

With sensitivity adjustment, adaptable to small component pins/carriers of different materials and colors.

Industrial-grade anti-interference performance, able to withstand high-frequency start-stop and electromagnetic interference from equipment.

Compared with other models in the same series… The CX-441 sensor has a consistent installation size, allowing for flexible replacement in some scenarios.

IV. Usage and Maintenance Points
Standard Wiring Definitions (3-wire system)
Brown wire: Positive power supply (+12~24VDC)
Blue wire: Negative power supply (0V/OV)
Black wire: NPN signal output terminal (connected to PLC/IO card input)
Common Troubleshooting
No signal output: Check if the power supply voltage is normal; confirm that the wiring polarity is not reversed; clean the dust/oil on the sensor lens.
False detection/frequent errors: Adjust the sensitivity knob; adjust the installation angle to avoid reflection/background interference; avoid direct sunlight.
Unstable output: Check if the cable is damaged/has poor contact; confirm that the equipment power supply has no ripple interference.

Panasonic CX-421 (UCX421-Z) Photoelectric Sensor 12-24VDC for Universal Insertion Machine
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