1734 ie4c Wiring Diagram: Understanding the Basics

If you’re working with programmable logic controllers (PLCs), you’re probably familiar with the 1734 ie4c input module. This device is designed to interface between industrial sensors and the PLC to provide reliable signals for process control. However, understanding the wiring diagram for this device can be a challenge, especially if you’re new to PLCs or industrial automation. In this article, we’ll explore the basics of the 1734 ie4c wiring diagram, including the various components, connections, and troubleshooting tips.

What is the 1734 ie4c Input Module?

The 1734 ie4c is a digital input module that supports up to 8 channels of 24V DC inputs. It’s designed to interface with various industrial sensors, such as limit switches, push buttons, and proximity sensors. The module connects to the PLC via a remote I/O communication network, such as EtherNet/IP, ControlNet, or DeviceNet. The module provides isolation for the inputs and has a compact and modular design that simplifies installation and maintenance. Let’s explore the wiring diagram for the 1734 ie4c in more detail.

The 1734 ie4c Wiring Diagram: Components and Connections

The 1734 ie4c wiring diagram consists of several components and connections that are critical to understanding how the module works. These include:

Power Supply and Ground Connections

The 1734 ie4c requires a 24V DC power supply that’s connected to the “+” and “-” terminals of the module. The power supply must be capable of providing sufficient current for the connected sensors. The module also requires a ground connection that’s connected to the common ground of the PLC and the sensors. The ground connection is critical for proper signal integrity and noise immunity.

Input Channels and Terminals

The 1734 ie4c provides up to 8 digital input channels that are connected to the sensor terminals. Each input channel has a corresponding LED indicator that shows the status of the input signal. The input terminals are labeled as “I0” to “I7” and are configured as sinking or sourcing inputs, depending on the input voltage level and the sensor type. For example, sinking inputs are typically used for NPN-type sensors, while sourcing inputs are used for PNP-type sensors.

Module Address Selection and Communication Network

The 1734 ie4c has a rotary switch that’s used to set the module address on the communication network. The module address must be unique within the network to avoid conflicts with other devices. The communication network is also selected via a DIP switch that’s located on the module. The network selection determines the type of cable and connector that’s used to connect the module to the PLC.

Wire Connections and Routing

The 1734 ie4c wiring diagram also includes information about the wire connections and routing. The wires must be properly terminated and secured to prevent accidental disconnections or shorts. The wire routing must be neat and organized to avoid interference with other devices or cables. The wiring diagram also specifies the wire colors and sizes that are recommended for the installation.

FAQ: Common Questions about the 1734 ie4c Wiring Diagram

Question Answer
Q: What is the maximum input voltage for the 1734 ie4c? A: The maximum input voltage is 30V DC.
Q: How do I troubleshoot a module that’s not receiving input signals? A: Check the wiring connections, verify the sensor polarity and voltage level, check the LED indicators, and use a multimeter to measure the input voltage.
Q: Can I use the 1734 ie4c with AC sensors? A: No, the module is designed for DC sensors only.


Understanding the 1734 ie4c wiring diagram is essential for successful installation and operation of the module. By following the guidelines and recommendations in this article, you should be able to properly wire and configure the module for your specific application. Always refer to the manufacturer’s documentation and guidelines for additional information and support.