WAGO 750-402 4-Channel Digital Input Module

Technical Overview

4-channel 24 VDC digital input module with 3ms filter and 500V system/field isolation for robust industrial signal acquisition.

Key Features

4-channel digital input for multiple sensor connections.
24 VDC nominal input voltage for industrial compatibility.
3 ms input filter for effective noise rejection.
CAGE CLAMP® connection technology for secure and reliable wiring.
IP20 protection rating suitable for control cabinet installations.
DIN-35 rail mounting for easy integration into standard enclosures.
Positive switching input characteristic.
LED status indicators for each digital input channel.

Technical Specification Matrix

Parameter	Value
Number of Digital Inputs	4
Signal Type	Voltage (Digital)
Voltage Signal Type	DC 24 V
Sensor Supply	DC 24 V
Input Characteristic	High-side switching
Input Filter (Digital)	3ms
Input Current per Channel for Signal (1) (typ.)	4.5mA
Voltage Range for Signal (0)	−3 … +5 VDC
Voltage Range for Signal (1)	15 … 30 VDC
Input Data Width (Internal) (max.)	4Bit
Supply Voltage (System)	DC 5 V; via data contacts
Power Consumption (5 V System Supply)	7.5mA
Supply Voltage (Field)	DC 24 V (-25 … +30 %); via power jumper contacts
Isolation	500 V system/field
Indicators	LED (A-D) green: Status DI 1 … DI 4
Current Carrying Capacity (Power Jumper Contacts)	10A
Connection Technology: Inputs/Outputs	8 x CAGE CLAMP®
Solid Conductor	0.08 … 2.5 mm² / 28 … 14 AWG
Fine-stranded Conductor	0.08 … 2.5 mm² / 28 … 14 AWG
Strip Length	8 … 9 mm / 0.31 … 0.35 inch
Ambient Temperature (Operation)	0 … +55 °C
Ambient Temperature (Storage)	-40 … +85 °C
Protection Type	IP20
Mounting Type	DIN-35 rail
Conformity Marking	CE
Vibration Resistance	4g per IEC 60068-2-6
Shock Resistance	15g per IEC 60068-2-27
Pollution Degree	2 per IEC 61131-2
Operating Altitude	0 … 2000 m / 0 … 6562 ft
Relative Humidity (without condensation)	95%
Physical Weight (kg)	0.05
Dimensions L x W x H (cm)	6.98 x 1.2 x 10

Industrial Applications

1. Industrial Process Monitoring

This module is ideal for monitoring the operational status of multiple 24VDC sensors, such as limit switches, proximity sensors, and pushbuttons, within automated industrial processes. Its 3ms noise-rejection filter and 500V system/field isolation ensure reliable signal acquisition even in electrically noisy environments.

Problem Solved

Ensures accurate and interference-free monitoring of critical field device states in demanding industrial settings, preventing false readings and improving system reliability.

Digital input24 VDCNoise rejectionElectrical isolationField devicesProcess control

2. Building Automation Systems

The WAGO 750-402 can be effectively used in building automation for collecting digital on/off signals from various building sensors. Its compact design, DIN-rail mounting, and 0-55°C operating temperature range make it suitable for integration into control cabinets for HVAC, security, or lighting control applications.

Problem Solved

Provides a robust and compact solution for integrating diverse digital sensors into building management systems, enabling efficient environmental and security control.

Digital input24 VDCDIN rail mountingBuilding managementSensor integrationAccess control

3. Machine Safety Interlock Systems

For machinery safety applications, this module offers isolated and filtered 24VDC inputs for critical safety interlock devices like guard door switches or emergency stop buttons. The 500V system/field isolation is crucial for preventing electrical disturbances from compromising the safety control system.

Problem Solved

Enhances the safety and reliability of machine interlock systems by providing electrically isolated and filtered inputs, crucial for preventing electrical noise from causing unintended machine operations or safety bypasses.

Digital input24 VDCSafety interlockElectrical isolationNoise filterMachine safety