Allen-Bradley 1734 POINT I/O Modules – 1734-IE4C

Name: Allen-Bradley 1734 POINT I/O Modules – 1734-IE4C
Brand: Allen-Bradley

Model: 1734-IE4C

Brand Allen-Bradley

Series 1734-IE4C

Model 1734-IE4C

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Product Details And Specifications

Allen-Bradley 1734 POINT I/O Series Technical Notes

The Evolution of 1734 POINT I/O Architecture

The 1734 POINT I/O platform was introduced by Rockwell Automation in the late 1990s as a successor to the 1771 and 1746 fixed I/O architectures, addressing the industry shift toward distributed control and fieldbus-based communication. Early revisions supported DeviceNet as the primary network adapter (1734-ADN), establishing the series in automotive assembly and material handling applications. The introduction of the 1734-AENT EtherNet/IP adapter in the mid-2000s marked the platform's transition into process industries, where deterministic Ethernet communication became the standard. Subsequent hardware revisions (Series A through Series C on select modules) improved noise immunity, expanded analog resolution from 12-bit to 16-bit on current-loop modules, and introduced HART pass-through capability on select analog modules. The 1734-IE4C specifically provides four channels of 4–20 mA current input with 16-bit resolution, directly addressing the signal standard used by the majority of field transmitters in process automation. As of 2024, the 1734 platform remains in active production, though several early DeviceNet-only adapter variants have reached end-of-life. Rockwell Automation's recommended migration path for obsolete 1734 nodes is the 5069 Compact I/O platform; however, the 1734 series retains a massive installed base requiring long-term spare parts support through 2035 and beyond.

1734 POINT I/O Full Catalog & Functionalities (SKU List)

Analog Input Modules

1734-IE4C: 4-channel 4–20 mA analog current input, 16-bit resolution, HART-ready wiring base
1734-IE2C: 2-channel 4–20 mA analog current input, 16-bit resolution, compact single-slot
1734-IE4S: 4-channel analog input, configurable voltage/current, SIL 2 rated safety module
1734-IE8C: 8-channel 4–20 mA analog current input, high-density process I/O node
1734-IRT8: 8-channel RTD/resistance input, supports Pt100, Pt1000, Ni120 sensor types
1734-IT2I: 2-channel isolated thermocouple input, supports J, K, T, E, R, S, B types

Analog Output Modules

1734-OE2C: 2-channel 4–20 mA analog current output, 16-bit resolution, loop-powered
1734-OE4C: 4-channel 4–20 mA analog current output, process control valve positioner interface

Digital Input Modules

1734-IB4: 4-channel 24V DC digital input, standard sinking input, IEC Type 1
1734-IB8: 8-channel 24V DC digital input, high-density discrete sensing
1734-IV4: 4-channel 24V DC digital input, sourcing (PNP) type, sensor interface
1734-IM4: 4-channel 120V AC digital input, mains-voltage field device interface

Digital Output Modules

1734-OB4E: 4-channel 24V DC digital output, electronically fused, 0.5A per channel
1734-OB8E: 8-channel 24V DC digital output, electronically fused, high-density actuator control
1734-OW4: 4-channel relay output, Form A contacts, 2A per channel, AC/DC load switching

Communication Adapters

1734-AENT: EtherNet/IP adapter, single-port, supports up to 63 I/O modules per node
1734-AENTR: EtherNet/IP adapter, dual-port ring topology, Device Level Ring (DLR) support
1734-ADN: DeviceNet adapter, legacy network support, 63-module node capacity
1734-ACNR: ControlNet adapter, redundant media support, deterministic I/O scanning

Power & Infrastructure

1734-EP24DC: 24V DC power supply expansion module, extends power budget across node
1734-TOP: Top-hat mounting base, single-module, standard DIN-rail installation

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