Minimal Example Wago750 402

WAGO 750-402 Display Example

Complete Hardware + Software Walkthrough

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Table of Contents

1. Introduction
2. Requirements
3. Hardware Setup
4. Software Setup
5. Demo
6. References

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1. Introduction

The WAGO 750-402 Display Example is a minimal demonstration showing how to display digital inputs from a WAGO 750-402 EtherCAT terminal using the QiTech Machine Framework.

It represents the simplest possible hardware interaction in the system:

Displaying digital inputs in the QiTech Control Dashboard.

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2. Requirements

2.1 Hardware

• WAGO 2787-2144 EtherCAT Power Supply
• WAGO 750-354 EtherCAT Coupler
• WAGO 750-602 EtherCAT Power Terminal
• WAGO 750-402 EtherCAT Terminal (4-channel digital input)
• WAGO 750-600 EtherCAT End Module
• WAGO 852-1322 Ethernet Switch
• 24V DC lab power supply (AC/DC adapter)
• Linux PC (Ubuntu/Debian recommended)
• Standard Ethernet cables
• Flat screwdriver

2.2 Software

See Device Example Basics for software prerequisites.

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3. Hardware Setup

3.1 Schematic

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⚠️ Always disconnect power before wiring. See Device Example Basics for the safe wiring procedure.

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3.3 Ethernet Switch Wiring

Wire the Ethernet switch:

1. Red wire (+24V) → PWR+
2. Black wire (0V) → RPS−

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3.4 Coupler Wiring

Wire the 750-354 EtherCAT Coupler:

1. Red wire (+24V)
2. Yellow wire (0V)

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3.5 Power Terminal Integration

Slide the 750-602 EtherCAT Power Terminal onto the right side of the 750-354 Coupler until it locks.

Wire as follows:

1. Green wire (Ground) → Terminal 4
2. Red wire (+24V) from 750-602 → Terminal 2
3. Black wire (0V) from 750-602 → Terminal 3
4. Red wire (+24V) from 750-354 → Terminal 6
5. Yellow wire (0V) from 750-354 → Terminal 7

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3.6 750-402 Terminal Integration

Slide the 750-402 EtherCAT Terminal onto the right side of the 750-602 until it locks.

Wire from the 24V DC lab power supply → Terminal 1.

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3.7 End Module Assembly

Slide the 750-600 EtherCAT End Module onto the right side of the 750-402 Terminal until it locks.

No wiring required.

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3.8 Power & Ethernet Connections

Power

Connect the 2787-2144 power supply to a power outlet.

Ethernet

1. PC → 852-1322 Ethernet Switch
2. Switch → 750-354 EtherCAT Coupler

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4. Software Setup

See Device Example Basics to install and run the software, then return here for the device-specific demo steps.

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5. Demo

5.1 Assigning Devices

After backend and frontend are running, you should see:

• WAGO 750-354 (Coupler)
• WAGO Module (Digital Input Terminal)

Steps:

1. Click Assign on the WAGO module
2. Select Digital Input Machine V1
3. Enter a serial number (must not be 0)
4. Click Write

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5.2 Displaying Digital Inputs

Navigate to:

Machines → DigitalInputMachine

Apply 15V–30V (24V recommended) to Terminal 1.

Expected behavior:

• The terminal LED lights up
• The input state is shown in the Control software

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6. References

This guide incorporates information from official WAGO documentation.

• WAGO 750-402 Documentation
• WAGO 750-354 Documentation
• WAGO 750-602 Documentation
• WAGO 750-600 Documentation