Schneider XS4P30AB120 Inductive Proximity Sensor

(Telemecanique OsiSense XS4)

Product Type: M30 Non-Flush Analogue 4–20mA Inductive Proximity Sensor

✅ Model Code Definition

XS4: XS4 series inductive proximity sensor

P: PBT plastic housing

30: M30 thread

A: Analogue output

B: Cable connection

1: DC power supply

20: 4–20mA current output

📌 Core Technical Specifications

🔌 Wiring Definition (3-core cable)

Brown: DC+ (Positive power)

Blue: DC(Negative power)

Black: 4~20mA signal output → connect to PLC analogue AI current input channel

Working principle: The closer the metal target is to the sensor, the higher the output current (rising from 4mA to 20mA).

15 mm distance = 4 mA; 1.5 mm distance = 20 mA.

Used for continuous displacement feedback and closed-loop control, not just discrete on/off switching.

📎 Typical Applications

1. Continuous position closed-loop feedback for hydraulic cylinders / pneumatic actuators (hydraulic presses, tooling clamps, lifting cylinders)
2. Workpiece thickness & gap measurement, material level monitoring
3. Continuous position feedback for manipulator soft limit & deceleration control
4. Metal workpiece distance detection on conveyor lines
5. Foot pedal position feedback (XS4P18ABxx of the same series is widely used for XPE foot pedals)

⚠️ Installation Notes & Cross-Model Reference

1. Strictly use non-flush mounting. No metal close to the sensor body, otherwise the sensing range will shrink.
2. Set the PLC AI module to 4–20mA current mode, not voltage input.
3. Same analogue sub-series comparison:

XS4P30AB110: 0~10V voltage output

XS4P30AB120: 4~20mA current output (this model, mainstream type)

4. Domestic alternative requirement: M30 non-flush, 4–20mA analogue inductive proximity sensor, Sn=15 mm, 12–24 VDC supply.

📄 Supporting Documents

Original datasheet, wiring diagrams, and PLC AI calibration examples are available on request.

XS4P30AB120 (M30, Sn15mm, 4–20mA Analogue Inductive Sensor) Field Application Cases

Core feature: Non-flush installation, metal target only, continuous distance output (1.5mm=20mA; 15mm=4mA). It is not a simple limit switch; ideal for continuous position feedback, PID closed-loop control, gap & thickness monitoring. IP67 rated for dusty, oily workshop environments.

Case 1: Closed-loop position feedback for hydraulic / pneumatic cylinders (hydraulic stations, machine tool presses, construction machinery)

Working condition: Presses, clamping jigs, lifting cylinders. Real-time rod position acquisition for PLC PID speed regulation, soft stop and buffer deceleration to avoid mechanical impact.

Installation: Fix XS4P30AB120 at the cylinder tail; mount a square steel target (45×45mm standard target) on the piston rod end. Keep the sensor axially aligned with the target, and keep the working stroke within 1.5~15 mm.

Control logic: 4mA = 15 mm (fully retracted); 20mA = 1.5 mm (fully extended). The PLC converts current value to displacement and triggers speed reduction when reaching preset positions.

Advantages: Lower cost than pull-wire displacement sensors, oil & dust resistant, simple installation for short-stroke cylinder buffering control.

1. DC 3-wire Discrete Output (P Series, PNP / NPN for PLC Digital Input)

1) PNP Output (Positive switching)

XS4P30PB340: NO normally open, 12~24VDC, 2m cable

XS4P30PB370: NC normally closed, 12~48VDC, 2m cable

XS4P30PC410: NO+NC (1NO+1NC), 12~24VDC, 4-wire cable

XS4P30PB340D: NO normally open, M12 connector

XS4P30PB370D: NC normally closed, M12 connector

2) NPN Output (Negative switching)

XS4P30NB340: NPN NO normally open

XS4P30NB370: NPN NC normally closed

III. 2-wire AC/DC Universal (M Series, suitable for relay circuits)

XS4P30MA230: NO normally open, 24~240V AC/DC, 2m cable, IP68

XS4P30MB230: NC normally closed, 24~240V AC/DC

Cable extension suffix: L1=5m, L2=10m (e.g. XS4P30MA230L1)

3. XS4P30AB Analogue Sub-series (Only 2 models available)

4. Suffix Options for Ordering

L1: Cable extended to 5 m

L2: Cable extended to 10 m

D: Replace cable with M12 4-pin connector

K: Extended body (overall length 70 mm)

5. Quick Selection Guide for XS4P30 Series
6. Displacement closed-loop, material level & gap measurement → XS4P30AB120 (4–20mA)
7. Position limit with digital switching signal → PB340 / MA230
8. Voltage analogue signal acquisition → XS4P30AB110

✅ Original Accuracy Specifications for XS4P30AB120 (Standard steel target 45×45×1 mm, 25℃)

1. Linearity error: ±2 mA

Full span 4～20mA (16mA total range), effective travel 1.5~15 mm (13.5 mm stroke).

±2mA corresponds to ±1.69 mm linear deviation.

2. Repeat accuracy: ≤3% Sr

Sr=15 mm → maximum repeat error ≤0.45 mm.

Meaning: Readout fluctuation will not exceed 0.45 mm when repeatedly positioning at the same spot.

3. Temperature drift (output current drift): Max 10% FS (full scale) across -25~+70℃

Range note: Linear performance and accuracy are only guaranteed within the effective working range of 1.5 mm (20mA) ~ 15 mm (4mA).

📌 Plain Summary

Excellent repeatability: approx. 0.45 mm, suitable for repeated positioning control.

Moderate linear deviation: ±1.7 mm, not for micron-level precision measurement; it is an industrial coarse-range analogue proximity sensor.

Additional A/D conversion error will be introduced by the PLC AI module, further reducing overall system accuracy.

⚠️ Key Factors Affecting Measurement Accuracy

Target material must be mild steel; stainless steel or aluminium will change sensitivity and increase error.

Strict non-flush mounting; no surrounding metal interference.

Strong welding electromagnetic interference, vibration and wide temperature swings will aggravate drift.