
Allen-Bradley 1734-IB4D POINT I/O Diagnostic Input Module
Product Summary
The 1734-IB4D from Allen-Bradley is a robust digital DC sinking input module. Engineers use this component for precise signal monitoring within a POINT I/O system. Its built-in diagnostic features provide critical real-time status for each of its four inputs, enhancing system reliability.
Product Procurement & Buyer Guide
The 1734-IB4D serves as a high-value solution for control system upgrades. Procurement managers need a module that offers both compatibility and advanced diagnostics. This model fits perfectly into existing 1734 series racks, supporting networks like ControlNet and EtherNet/IP. Its compact dimensions of 2.2 x 0.47 x 2.97 inches save valuable panel space.

This module operates on a nominal 24 Volts DC input. It draws a maximum of 5 milliamps per input, making it energy efficient. The power dissipation is a low 1.9 BTU/hour, reducing thermal stress in the cabinet. For application engineers, the diagnostic LEDs on each channel simplify troubleshooting. This feature directly reduces downtime during system commissioning.
The unit requires a POINTBus current of 50 milliamps. It also supports a maximum bus current of 75 mA at 5 Volts DC. These specifications ensure stable communication with the bus coupler. The removable terminal block (RTB) simplifies wiring and future module replacement. The terminal base screw torque is 0.8 N-m (7 lb-in), a standard value for secure connections.
Step-by-Step Installation Guide

Proper installation of the 1734-IB4D ensures long-term operational success. First, mount the module onto a compatible 1734 series mounting base. You can orient the assembly horizontally or vertically in an open-style enclosure. Ensure the ambient temperature stays between -20 to 55 °C (-4 to 131 °F) for reliable operation.
Next, connect the field wiring to the removable terminal block. The module accepts 24V DC sinking inputs from sensors or switches. Each of the four inputs, labeled 0 through 3, has a dedicated status indicator. Verify the input voltage range is between 10 and 28.8 Volts DC. This wide range accommodates various power supply tolerances.
After wiring, secure the terminal block onto the base. The module uses a single keyswitch position for correct alignment. Finally, connect the system to the network and apply power. The diagnostic lights will immediately show the state of each channel. This simple process allows for rapid deployment in critical automation projects.
Logistics & Standard Packaging Details

- One Allen-Bradley 1734-IB4D Digital DC Sinking Input Module
- Removable Terminal Block (RTB) for field wiring
- Product documentation and installation guide
We ship all orders via express delivery services. Our partners include FedEx, UPS, and DHL to ensure fast transit. This module weighs approximately 1.14 ounces for easy handling.