WIKA PSD-4-ECO Electronic Pressure Switch

ماركة: WIKA (ألمانيا). Full model designation: PSD-4-ECO. It belongs to the PSD series economical OEM programmable electronic pressure switch.

1. Product Profile

Designed for OEM mass equipment integration. It combines pressure measurement, العرض الرقمي, switch outputs, analogue and IO-Link communication. Factory pre-configuration is available for direct installation upon delivery. Ideal for mass production of automation equipment, hydraulic stations, lubrication systems, cooling circuits, air compressors and other machinery. Cost advantage over the standard PSD-4 version.

2. المواصفات الفنية الرئيسية
3. الهيكل الميكانيكي & عرض

Compact body with Φ29 mm outer diameter; display head rotatable through 335°, screen supports 180° electronic flip for easy reading in confined spaces.

4-digit LED display with tri-colour status indication: green when pressure is within set range; red for alarm / out-of-range condition. Local parameter configuration via 3 push-buttons.

2. Measurable Media: Non-hazardous gases and liquids (gauge pressure measurement).
3. Pressure Ranges: Vacuum from -1 bar up to 7500 رطل لكل بوصة مربعة (تقريبا. 500 حاجِز), multiple ranges available.
4. دقة: ≤ ±0.5% FS, low long-term drift.
5. Electrical Outputs (configurable options)

Two PNP/NPN switch points, independently configurable setpoint, reset point, hysteresis and delay; مفتوحة عادة / normally closed programmable.

Analogue output: 4-20 مللي أمبير / 0-10 فولت; optional IO-Link 1.1 digital communication for pressure reading, diagnostics and remote parameterisation.

6. المقاومة البيئية

درجة حرارة التشغيل: -40 ℃ ~ +125 درجه مئوية

مقاومة الصدمات: ما يصل الى 50 ز; switch service life ≥100 million switching cycles.

7. مزود الطاقة: DC 10…30 V.
8. Pressure Process Connections: G1/4, 1/4 NPT and other thread options.
9. التسميات النموذجية (PSD-4-ECO)

PSD: Pressure Switch Digital, electronic pressure switch with display

4: سلسلة المنتجات

ECO: Economical OEM variant (bulk simplified packaging, factory pre-configuration for machinery OEM volume procurement)

مقارنة: PSD-4 (الإصدار القياسي) with identical functions for project / spare part orders. PSD-4-ECO targets OEM mass orders with better pricing and factory preset parameters.

4. التطبيقات النموذجية

Pressure monitoring and protection for hydraulic stations and lubrication systems

Pressure alarm for air compressors, refrigeration and cooling systems

Automation pressure control for construction machinery, packaging machines and machine tools

Water treatment and general industrial fluid monitoring

5. تثبيت & Commissioning Guidelines
6. تصاعد: Avoid heavy vibration. Lock the rotating head after adjustment. Use PTFE tape for thread sealing on the pressure port. Do NOT torque the display housing.
7. Parameter setup: Local configuration via 3 push-buttons for switch threshold and hysteresis. IO-Link master enables remote parameter editing and device diagnostics.
8. Media limitation: Not suitable for strongly corrosive media. Medium temperature must not exceed sensor limits.
9. استكشاف أخطاء المرجع السريع وإصلاحها

7. مرجع الاختيار البديل
8. Same brand upgrade: PSD-4 (النسخة القياسية, better stock availability)
9. البدائل المحلية: Kangyu, Xingyi, Meikong digital pressure switches (تكلفة أقل, most without IO-Link)
10. Other imported brands: IFM PN series, SICK pressure transmitters with switch output

WIKA PSD-4-ECO Wiring Definition & IO-Link Register Description

تواصل: رابط الإدخال والإخراج 1.1, كوم2 (38.4 kbit/s), minimum cycle time 2.3 آنسة, Port Class A. IO-Link only available on PNP models; NPN versions do NOT support IO-Link.

موصل: M12×1, available as 4-pin (single switch) and 5-pin (dual switch + التناظرية) variants.

1. M12 Pin Assignment (Text-based Wiring Diagram)

1) 4-pin M12 (Single switch SP1, IO-Link optional)

2) 5-pin M12 (Dual switch SP1+SP2, التناظرية / IO-Link optional)

✅ IO-Link Wiring Key Points:

1. IO-Link uses pin 4 (C/Q), power via pin1 & pin3. No extra signal wire required.
2. Hardware multiplex of IO-Link and SP1. Device automatically switches to IO-Link mode when connected to IO-Link master.
3. كابل: Standard shielded IO-Link M12 cable, الأعلى. طول 20 م.
4. Master port: Port Class A.

⚠️ Wiring Prohibitions:

No AC power input; avoid reverse polarity of U+/U-.

4–20 mA analogue is 3-wire; S+ must NOT be shorted to power.

إخراج بي إن بي: High level (~24V) when switched ON; NPN pulls to 0V when ON (NPN without IO-Link).

2. IO-Link Process Data (بي دي, Cyclic Real-Time Data)

Process data length: 4-byte input PD (Slave → Master); No output PD (Master cannot write cyclic process data).

Data format: Big-Endian, Float32 IEEE754. Pressure unit follows device internal setting (حاجِز / MPa / رطل لكل بوصة مربعة).

Process data only transmits pressure value. Switch status, temperature and diagnostics are read via ISDU indexed parameters.

3. IO-Link ISDU Index Registers (Acyclic Read/Write, Master Parameter Access)

Index + Subindex. R=Read-only; RW=Read-Write

Device Information Area (Read-only)

قياس & Diagnostic Read-only Parameters

System Command

4. IO-Link Commissioning Notes
5. IODD File: Download PSD-4-ECO IODD from WIKA official website. Import into IO-Link master software for automatic identification, no manual index entry required.
6. Power-up sequence: 1s boot time before IO-Link handshake.
7. Read/Write workflow:

Read live pressure: Read cyclic process data PD

Modify switch threshold: ISDU write 0xB0 (SP1 setpoint), 0xB1 (reset point)

Read switch status: ISDU read index 0x90, 0x91

4. Common IO-Link communication faults

Handshake failure: Check pin4 wiring; confirm PNP IO-Link version; verify supply voltage

Parameter write not effective: Some parameters require save command, others take effect immediately

Unstable pressure reading: Increase Signal Damping filter time

5. Normal Mode (Non-IO-Link) Wiring Summary

Without IO-Link master, pin4 of 4-pin /5-pin connector works as standard PNP SP1 output. SP2 is second switch output; S+ is 4–20mA /0–10V analogue output for direct connection to PLC analogue module.

WIKA PSD-4 Series Full Model Portfolio List

The PSD-4 series contains two main product lines: PSD-4 (الصناعية القياسية, PE81.86) and PSD-4-ECO (OEM Economy, PE81.69). Both are programmable electronic pressure switches with display, sharing similar hardware architecture, differing in temperature rating, التعبئة والتغليف, pre-configuration capability and accuracy class.

This is a modular selection system. There is no fixed single part number. Complete order model is assembled by: [النموذج الأساسي + Pressure Range + الإخراج + رابط الإدخال والإخراج + Process Connection + Seal + Certificates].

1. Series Sub-families Overview

ملحوظة: Legacy PSD-30 is not part of PSD-4 series, it belongs to previous generation, avoid confusion.

2. PSD-4 Standard Version Available Ranges (Gauge G / Absolute A / Compound)

Gauge Pressure (ز)

-1 … 0 حاجِز (مكنسة)

-1 … +3 حاجِز

0 … 0.4 حاجِز

0 … 1 حاجِز

0 … 2.5 حاجِز

0 … 6 حاجِز

0 … 10 حاجِز

0 … 16 حاجِز

0 … 25 حاجِز

0 … 40 حاجِز

0 … 60 حاجِز

0 … 100 حاجِز

0 … 160 حاجِز

0 … 250 حاجِز

0 … 400 حاجِز

0 … 600 حاجِز

Absolute Pressure (أ)

0 … 0.4 bar abs

0 … 1 bar abs

0 … 2.5 bar abs

0 … 6 bar abs

0 … 10 bar abs

0 … 16 bar abs

0 … 25 bar abs

Compound Pressure (مكنسة + إيجابي)

-1 … +5 حاجِز

-1 … +10 حاجِز

-1 … +24 حاجِز

3. PSD-4-ECO OEM Version Available Ranges

Range coverage is largely same as PSD-4. Max gauge pressure up to 0…1000 bar, high pressure ranges only available on ECO.

مكنسة: -1…0 bar; Compound: -1…+24 bar; Absolute max. 0…25 bar abs.

4. Output Options (Common for PSD-4 / PSD-4-ECO)
5. 1× switch output (SP1): بنب / نبن; M12 4-pin
6. 2× switch output (SP1+SP2): بنب / نبن; M12 4-pin
7. 2× switch + التناظرية: بنب/نبن + 4…20mA / 0…10V; M12 5-pin
8. IO-Link version: PNP with multiplexed C/Q; NPN hardware without IO-Link

رابط الإدخال والإخراج: 1.1, كوم2; ECO strongly recommended for OEM IO-Link applications

5. Process Connection Options
6. G1/4 A male thread (ISO1179, الأكثر شيوعا)
7. G1/2 A male thread
8. 1/4 NPT male
9. 1/2 NPT male
10. Hygienic types: G1/2 B, Tri-clamp (PSD-4 standard only; PSD-4-ECO no hygienic diaphragm)
11. Seal Material Options

نبر (Nitrile): General water, الهواء المضغوط, mineral oil, درجة الحرارة المحيطة

FKM/Viton: Oil resistant, كيميائية & مقاومة درجات الحرارة العالية

EPDM (EPDM): الماء الساخن, dilute acid / قلوي

7. Electrical Connection Options
8. M12×1 circular connector: 4-دبوس / 5-دبوس (السائدة)
9. Fixed angle cable outlet: 2م, 5م, 10م
10. Full Order Model Assembly Template

PSD-4 Standard Template

PSD-4 / يتراوح / الإخراج / رابط الإدخال والإخراج(Yes/No) / Process Connection / Seal / Certificate

مثال:

PSD-4,0…10bar G,2×PNP+4-20mA,رابط الإدخال والإخراج,G1/4A,نبر,cULus

PSD-4-ECO OEM Template

PSD-4-ECO / يتراوح / الإخراج / رابط الإدخال والإخراج / Process Connection / Seal

مثال:

PSD-4-ECO,-1…+24bar G,2×PNP,رابط الإدخال والإخراج,G1/4A,FKM

9. Pre-assembled Factory Reference Part Numbers (WIKA Article No.)

Reference only. Part numbers subject to revision. Place orders using model string above.

1. 14240381：PSD-4；-1…0bar G；Dual PNP switch, no analogue, M12 4-pin
2. 14240400：PSD-4；-1…+3bar G；Dual PNP switch
3. 14240463：PSD-4；-1…+3bar G；Dual PNP + 4-20mA analogue
4. 14240434：PSD-4；0…160bar G；Dual PNP switch
5. 14240494：PSD-4；0…160bar G；Dual PNP + 4-20mA analogue
6. PSD-4 vs PSD-4-ECO Core Comparison

11. ملاحظات الاختيار
12. IO-Link is only available for PNP output variants. NPN hardware does not support IO-Link.
13. ECO is designed for OEM volume orders. Limited stock for single unit purchase. For project spares, PSD-4 standard is preferred.
14. All models support local 3-button configuration. IO-Link versions support remote read/write parameters. The IODD register definitions are largely identical for PSD-4 and PSD-4-ECO.
15. الحماية من الانفجار: Intrinsically safe versions are separate product lines outside PSD-4 family. PSD-4 / PSD-4-ECO are non-explosion-proof by default.