GE Series 90-30 IC694 Modules: IC694APU300 High Speed Counter Module —

Technical Dossier

Product Details And Specifications

GE Series 90-30 IC694 Series: Comprehensive Module Range and Technical Overview

The GE Series 90-30 programmable logic controller platform, identified by the IC694 module prefix, is one of the most widely deployed mid-range PLC architectures in global heavy industry. Installed across petrochemical refineries, nuclear power auxiliary systems, chemical processing plants, pulp and paper mills, and water treatment facilities, the Series 90-30 established a benchmark for modular, rack-based control architecture throughout the 1990s and 2000s. The IC694 designation specifically identifies the 5-slot and 10-slot rack-compatible modules operating under the Series 90-30 CPU backplane bus. These systems remain operational in thousands of facilities worldwide, making lifecycle parts sourcing a critical operational requirement for plant maintenance engineers and reliability teams.

The Evolution of IC694 Architecture

The Series 90-30 platform was introduced by GE Fanuc Automation in the early 1990s as a successor to the Series Six and Series Five PLC families. The IC694 module family was designed around a proprietary backplane bus with deterministic scan-cycle execution, supporting both standalone and distributed I/O configurations via Genius Bus (IC694BEM320/321) and later Ethernet adapters. Early CPU modules such as the IC693CPU311 and IC693CPU331 (IC693 prefix, the predecessor rack family) established the programming model that IC694 CPUs inherited. The IC694 generation introduced higher-density I/O, expanded memory, and support for the Logicmaster 90 and later Proficy Machine Edition programming environments. As the platform matured into the 2010s, GE Intelligent Platforms (later rebranded as Emerson Automation Solutions after the 2018 acquisition) continued to support the Series 90-30 under a long-term lifecycle program, though new module production has wound down. The platform is now firmly in its end-of-active-production phase, with spare parts availability dependent on authorized distributors and specialist industrial surplus suppliers.

IC694 Full Catalog & Functionalities (SKU List)

CPU & Controller Modules

• IC694CPU310: Series 90-30 CPU, 6K user memory, no floating point, basic ladder logic execution.
• IC694CPU311: Series 90-30 CPU, 12K user memory, supports structured text and function block programming.
• IC694CPU323: Series 90-30 CPU, 64K user memory, floating point math, enhanced instruction set.
• IC694CPU364: Series 90-30 CPU with embedded Ethernet port, 240K user memory, supports SRTP and Modbus TCP.
• IC694CPU374: High-performance Series 90-30 CPU, 512K user memory, dual Ethernet, motion coordination support.

Analog & High-Speed Counter Modules

• IC694APU300: High Speed Counter module; supports up to 4 independent counter channels, quadrature encoder input, 1 MHz count rate, used in position feedback and flow measurement applications.
• IC694ALG220: 4-channel analog input module, 4–20 mA / 0–10 V, 12-bit resolution.
• IC694ALG221: 8-channel analog input module, 4–20 mA / 0–10 V, 12-bit resolution.
• IC694ALG390: 2-channel analog output module, 4–20 mA / 0–10 V, 12-bit resolution.
• IC694ALG391: 4-channel analog output module, 4–20 mA / 0–10 V, 12-bit resolution.

Digital I/O Modules

• IC694MDL340: 32-point 24 VDC discrete input module, sink/source configurable.
• IC694MDL341: 32-point 24 VDC discrete input module, isolated commons.
• IC694MDL740: 32-point 24 VDC discrete output module, 0.5 A per point.
• IC694MDL741: 32-point 24 VDC discrete output module, 1 A per point, protected outputs.
• IC694MDL930: 16-point relay output module, Form C contacts, 2 A per point, 120/240 VAC.

Communications & Bus Adapter Modules

• IC694BEM320: Genius Bus Controller module; interfaces Series 90-30 rack to Genius I/O bus network.
• IC694BEM321: Genius Bus Controller, dual-bus redundancy support for high-availability configurations.
• IC694PBS101: PROFIBUS-DP slave adapter module for Series 90-30 rack integration into PROFIBUS networks.

Power Supply Modules

• IC694PWR321: 120/240 VAC input power supply, 30 W output, standard rack power for 5-slot and 10-slot configurations.
• IC694PWR330: 24 VDC input power supply, 30 W output, for DC-powered panel installations.

Sourcing Hard-to-Find & Obsolete IC694 Parts

With GE Automation's Series 90-30 platform in end-of-active-production status, procurement of IC694 modules increasingly depends on specialist industrial spare parts suppliers with verified surplus inventory. DriveKNMS maintains a dedicated inventory program for the IC694 series, covering both current-production modules still available through distribution channels and discontinued models sourced from decommissioned plant equipment. All IC694 modules in DriveKNMS inventory are catalogued by part number, firmware revision where applicable, and physical condition grade. For plant operators requiring long-term maintenance agreements or scheduled replacement programs for Series 90-30 systems, DriveKNMS provides multi-unit procurement support and advance reservation of critical spare modules including CPU units, power supplies, and high-density I/O cards. Inquiries for obsolete or low-availability IC694 part numbers are handled directly by the technical sales team.

Quality Control for the IC694 Range

IC694 modules present specific testing challenges due to the proprietary backplane bus architecture and the age profile of available surplus inventory. DriveKNMS applies a structured inspection and functional verification protocol to all IC694 modules prior to dispatch. Each module undergoes visual inspection for capacitor condition, connector pin integrity, and PCB corrosion. CPU modules are bench-tested under live Series 90-30 rack conditions using verified reference firmware, with scan-cycle timing and memory read/write integrity confirmed. Analog modules including the ALG220, ALG221, ALG390, and ALG391 are calibrated against traceable reference standards for channel accuracy and linearity. The IC694APU300 High Speed Counter module is tested at full 1 MHz input frequency across all four counter channels, with quadrature decode verification and preset/reset function confirmation. Communication modules are tested for bus arbitration and data integrity under simulated network load. All tested modules are issued with a DriveKNMS inspection record documenting test date, test configuration, and pass criteria.

© 2026 DriveKNMS. All trademarks belong to their respective owners. Specifications are for reference only and subject to change without notice. Verify all parameters against official documentation before installation.