Allen-Bradley 1734 POINT I/O Modules – 1734-IK/C

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

Model: 1734-IK/C

Brand Allen-Bradley

Series 1734-IK/C

Model 1734-IK/C

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Technical Dossier

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 in the late 1990s as Rockwell Automation's answer to distributed I/O requirements in mid-range PLC applications. Early revisions used a proprietary backplane protocol with limited network adapter options. The introduction of the 1734-AENT EtherNet/IP adapter marked a significant architectural shift, enabling the platform to participate in CIP (Common Industrial Protocol) networks alongside ControlLogix and CompactLogix controllers.

Firmware revisions across the series addressed backplane throughput limitations, with later hardware revisions (Series B and Series C) introducing improved noise immunity and extended operating temperature ranges. The 1734-IK/C Incremental Encoder Module, for example, carries a Series C designation indicating third-generation hardware with enhanced counter resolution and differential input support. Compatibility between Series A, B, and C modules on the same backplane is maintained at the communication level, though firmware version alignment with the network adapter is required. Modules from the original Series A production run (pre-2005) may require firmware upgrade on the adapter before integration with Studio 5000 Logix Designer v21 and above.

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

Incremental Encoder / Counter Modules

1734-IK/C: Incremental encoder interface module, Series C; supports differential quadrature input, 1 MHz max count rate, 24V DC
1734-IK: Incremental encoder interface module, Series A/B; base revision, 500 kHz max count rate

Digital Input Modules

1734-IV2: 2-point 24V DC sourcing digital input module, POINT I/O standard density
1734-IV4: 4-point 24V DC sourcing digital input module
1734-IV8: 8-point 24V DC sourcing digital input module, high-density
1734-IA2: 2-point 120V AC digital input module
1734-IA4: 4-point 120V AC digital input module
1734-IB2: 2-point 24V DC sinking digital input module
1734-IB4: 4-point 24V DC sinking digital input module
1734-IB8: 8-point 24V DC sinking digital input module

Digital Output Modules

1734-OV2E: 2-point 24V DC sourcing digital output module with diagnostics, electronically fused
1734-OV4E: 4-point 24V DC sourcing digital output module with diagnostics
1734-OA2: 2-point 120/240V AC digital output module, triac output
1734-OB2EP: 2-point 24V DC protected sourcing output, pulse-capable

Analog Input Modules

1734-IE2C: 2-channel current analog input module, 4–20 mA, 16-bit resolution
1734-IE2V: 2-channel voltage analog input module, 0–10V / ±10V selectable
1734-IR2: 2-channel RTD/resistance analog input module, supports Pt100, Pt1000, Ni120
1734-IT2I: 2-channel thermocouple analog input module, supports J, K, T, E, R, S, B types

Analog Output Modules

1734-OE2C: 2-channel current analog output module, 4–20 mA, 16-bit resolution
1734-OE2V: 2-channel voltage analog output module, 0–10V / ±10V

Communication Adapters

1734-AENT: EtherNet/IP network adapter, single-port, supports DLR (Device Level Ring)
1734-AENTR: EtherNet/IP network adapter, dual-port, DLR-capable for ring topology
1734-ADN: DeviceNet network adapter for 1734 POINT I/O
1734-ACN: ControlNet network adapter, coax connection

Power Distribution & Base Units

1734-EP24DC: 24V DC power distribution module, extends power segment on backplane
1734-TOP: Terminal base unit, screw-type, for standard I/O modules
1734-TOPS: Terminal base unit, spring-clamp, for standard I/O modules

Quality Control for the 1734 POINT I/O Range

All 1734 POINT I/O modules processed by DriveKNMS undergo a structured inspection and functional test protocol prior to dispatch. The procedure addresses the specific failure modes documented for this platform, including backplane connector wear, internal DC/DC converter degradation, and ASIC-level communication faults on the network adapter modules.

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