WAGO 750-438

WAGO 750-438 – 2 NAMUR Digital Inputs (Intrinsically Safe)

Overview

The WAGO 750-438 module provides two intrinsically safe digital inputs for NAMUR sensors, suitable for use in hazardous areas (Zones 0/1). Each sensor is supplied with a short-circuit-protected 8.2 V source. The module includes LED status indicators, electrical isolation between field and system levels, and complies with explosion safety standards. Must be powered by an Ex i power supply.

Key Features

• Two inputs for NAMUR sensors

• Intrinsically safe (Ex i) design for hazardous areas (Zone 0/1)

• Short-circuit protected 8.2 V sensor supply

• High-side switching input characteristic

• 3 ms input filter (digital)

• Green LEDs to indicate “signal on” for each channel

• Electrical isolation between system side and field side

• Compact width (12 mm) DIN-rail mount

Technical Specifications

• Part Number: 750-438

• Number of Digital Inputs: 2

• Signal Type: NAMUR (2-wire)

• Sensor Supply Voltage: 8.2 VDC, short-circuit-protected

• System Supply Voltage: 5 VDC via data contacts

• Field Supply Voltage: 24 VDC via power jumper contacts; Ex i power supply max Uo = 27.3 V

• Signal Current (0): ≤ 1.2 mA

• Signal Current (1): ≥ 2.1 mA

• Open-Circuit Voltage: 8.2 V

• Short-Circuit Current: ≤ 8.2 mA

• Switching Hysteresis: 0.2 mA

• Input Filter Time: 3 ms

• Minimum Input Pulse Length: 5 ms

• Minimum Input Pulse Separation: 3 ms

• Isolation Voltage (System vs Field): 300 VAC

• Max Current via Power Jumper Contacts: 1 A

• Power Consumption (Module, No Load, Field Supply): ~16 mA

• Power Consumption (System Side, 5 V): ~2.5 mA

• Maximum Total Power: ~0.4 W

• Power Loss: ~0.27 W

• Connection Technology: CAGE-CLAMP®

• Conductor Size: 0.08 … 2.5 mm² (AWG 28 … 14)

• Wire Strip Length: 8 … 9 mm

• Dimensions (W × H × D): 12 × 100 × 67.8 mm

• Depth from Upper Edge of DIN-Rail: ~60.6 mm

• Operating Temperature: 0 … +55 °C

• Storage Temperature: -25 … +85 °C

• Protection Rating: IP20

• Pollution Degree: 2

• Vibration Resistance: 4 g

• Shock Resistance: 15 g

• Approvals / Standards: ATEX, IECEx, Underwriters Laboratories for hazardous locations; EN/IEC 60079-0, -7, -11

Applications

• Connecting NAMUR sensors in hazardous areas (Zones 0/1)

• Use where intrinsically safe circuits are required for safety compliance

• Industrial automation with field inputs in Ex environments

• Situations where signal integrity and safety are both critical

Why Choose the WAGO 750-438

• Certified intrinsically safe module for hazardous environments

• Compact 2-channel NAMUR input reduces wiring and module count

• LED status indicators simplify diagnostics

• Strong isolation between field and system sides improves safety and reliability

Order Now

The WAGO 750-438 is part of the WAGO I/O System 750 series and is available for purchase. Ships worldwide.

NEW product in original sealed packaging. The product may be of older version or design. The packaging may have markings, signs of discoloration, and wear. DDPARTSSOLUTION Warranty: 1 Year. Manufacturer's Warranty and Support NEVER apply