Allen Bradley 1734-IB4 Point I/O 4 Point Digital Input Module

The Allen-Bradley 1734-IB4 is a 4-point sinking digital input module designed for the POINT I/O system. The 1734-IB4 interfaces field-side sensor devices—such as 2-wire or 3-wire proximity switches—with a central controller over I/O networks like DeviceNet, PROFIBUS, ControlNet, or EtherNet/IP via compatible adapters. Receiving 24V DC discrete signals, it produces 1 byte of input data for processor memory mapping.

Features

• 4 sinking DC input channels arranged in 1 group of 4
• Direct installation on DIN rail using compatible 1734 series terminal base assemblies
• Integrated LED status indicators for network status, module status, and individual channel input status
• Keyed insertion system to prevent improper module placement
• Support for Removable Terminal Blocks (RTB) to allow module replacement without disturbing field wiring

Applications

• Factory automation and process control signal acquisition
• Interface for 2-wire and 3-wire DC proximity switches
• Discrete limit switch and push-button input processing
• Distributed control systems utilizing POINT I/O architecture

Technical Specifications

Connections/Interfaces

Installation Guidelines

• DIN Rail Installation: Mount the module onto a zinc-plated chromate-passivated steel DIN rail (part number 199-DR1; 46277-3; EN50022) to establish proper chassis grounding. Secure the DIN rail every 200 mm (7.8 in.) and use end-anchors.
• Enclosure Requirements: Install inside an enclosure suitable for Pollution Degree 2 industrial environments, providing an ingress protection rating of at least IP54 for hazardous location applications.
• Mechanical Keying: Rotate the keyswitch on the mounting base to position 1 before inserting the module. Ensure the DIN rail locking screw is in the horizontal position before module insertion.
• Wiring Safety: Ensure field-side power and backplane power are removed before inserting or removing the module or terminal block in hazardous locations to prevent electrical arcing.
• Power Supply: Power the equipment from a SELV or PELV compliant source to comply with CE Low Voltage Directive requirements.

Compliance and Certifications

• UL Listed Industrial Control Equipment (UL File E65584)
• UL Listed for Class I Division 2 Group A, B, C, D Hazardous Locations (UL File E194810, Temp Code T4A)
• UKEX / ATEX: II 3 G Ex ec IIC T4 Gc (DEMKO 04 ATEX 0330347X, UL22UKEX2478X)
• IECEx: Ex ec IIC T4 Gc (IECEx UL 20.0072X)
• CE / UKCA EMC: EN 61326-1, EN 61000-6-2, EN 61000-6-4, EN 61131-2
• RoHS: EN IEC 63000
• RCM, KC, CCC (202012230911607)