GE Fanuc Series 90-30 CPU Modules: IC693CPU341

Model: IC693CPU341

Brand General Electric

Series Series 90-30

Model IC693CPU341

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Technical Dossier

Product Details And Specifications

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

The GE Fanuc Series 90-30 (Series 90™-30) is a modular programmable logic controller platform introduced in the late 1980s and deployed extensively across global heavy industry. Installed base spans petrochemical refineries, nuclear auxiliary systems, pulp and paper mills, water treatment facilities, and automotive assembly lines. The platform's 5-slot and 10-slot baseplate architecture, combined with a standardized backplane bus, enabled scalable I/O expansion without controller replacement — a key factor in its multi-decade service life. As of 2026, the Series 90-30 is classified as a mature/end-of-life platform by GE Vernova (formerly GE Digital / Emerson). OEM production of select modules has ceased; however, the installed base remains active in facilities with 15–25 year capital replacement cycles, making third-party lifecycle support critical.

The Evolution of Series 90-30 Architecture

The Series 90-30 was launched as a mid-range successor to the Series Six and Series Five PLC families. Early CPU releases (circa 1989–1993) used the IC693CPU311 and IC693CPU313, which operated at 16 MHz with limited ladder logic capacity (6K–12K steps). The platform transitioned through three distinct architectural generations:

Generation 1 (1989–1995): Single-slot CPUs with serial port only, no Ethernet native support, EPROM-based firmware. Representative models: IC693CPU311, IC693CPU313, IC693CPU321, IC693CPU323.

Generation 2 (1995–2005): Enhanced CPUs with expanded memory, floating-point math coprocessor options, and support for the Ethernet Interface Module (IC693CMM321). The IC693CPU341 belongs to this generation — 32 MHz processor, 240KB user memory, dual serial ports (RS-232/RS-485), supports up to 2,048 discrete I/O points and 512 analog channels. Compatible with all IC693 I/O modules and IC694 expansion baseplates.

Generation 3 (2005–2015): CPU374 and CPU375 class modules with embedded Ethernet, SRTP protocol support, and compatibility with Proficy Machine Edition programming software. These represent the final OEM-supported generation before platform end-of-life designation.

Compatibility note: IC693-series modules are NOT directly interchangeable with IC694-series (Series 90-30 Enhanced) modules at the CPU slot level. Backplane pinouts differ. Verify baseplate revision before substitution.

Series 90-30 Full Catalog & Functionalities (SKU List)

CPU Modules

IC693CPU311: 6K-step CPU, 16 MHz, single RS-232 port, EPROM firmware, 5/10-slot baseplate.
IC693CPU313: 12K-step CPU, 16 MHz, dual serial ports, expanded discrete I/O capacity.
IC693CPU321: 32K-step CPU, floating-point support, RS-232/RS-485, 240KB user memory.
IC693CPU323: Enhanced 32K-step CPU, increased analog channel support, dual serial.
IC693CPU331: 80K-step CPU, 32 MHz, supports Motion Control modules, 512 analog I/O.
IC693CPU340: 240KB CPU, Ethernet-ready via CMM321, predecessor to CPU341.
IC693CPU341: 240KB single-slot CPU, 32 MHz, RS-232 + RS-485, 2048 discrete / 512 analog I/O, supports IC693CMM321 Ethernet module — primary subject of this listing.
IC693CPU350: 32K-step enhanced CPU, embedded diagnostics, compatible with IC694 expansion.
IC693CPU360: 64K-step CPU, high-speed interrupt inputs, Proficy ME compatible.
IC693CPU374: Embedded 10/100 Ethernet, SRTP, 240KB, final-generation Series 90-30 CPU.
IC693CPU375: 512KB CPU, embedded Ethernet, redundancy-capable, Proficy ME.

Discrete Input Modules

IC693MDL230: 8-point 120VAC discrete input, isolated, DIN rail compatible.
IC693MDL240: 16-point 120VAC discrete input, standard density.
IC693MDL241: 16-point 24VDC discrete input, sink/source configurable.
IC693MDL260: 32-point 24VDC discrete input, high-density, single slot.

Discrete Output Modules

IC693MDL310: 8-point relay output, 2A per point, Form C contacts.
IC693MDL340: 16-point 120VAC triac output, 0.5A per point.
IC693MDL390: 32-point 24VDC transistor output, high-density.

Analog Modules

IC693ALG220: 4-channel analog input, 4–20mA / 0–10V, 12-bit resolution.
IC693ALG390: 8-channel analog input, 13-bit, thermocouple/RTD compatible.
IC693ALG442: 4-channel analog output, 12-bit, 4–20mA / 0–10V.

Communications & Specialty

IC693CMM321: Ethernet TCP/IP interface, 10BaseT, SRTP/Modbus TCP, pairs with CPU341.
IC693CMM311: Serial communications module, RS-232/RS-485, ASCII/RTU Modbus.
IC693PBS301: PROFIBUS-DP slave adapter, 12 Mbps, single slot.

Power Supply Modules

IC693PWR321: 120/240VAC input power supply, 30W, 5VDC / 24VDC output.
IC693PWR330: 24VDC input power supply, 30W, isolated outputs.

Sourcing Hard-to-Find & Obsolete Series 90-30 Parts

Quality Control for the Series 90-30 Range

Series 90-30 modules use a proprietary backplane bus operating at 5V TTL logic levels. Failure modes specific to this platform include backplane connector oxidation (IC693 5-slot and 10-slot baseplates), SRAM battery depletion on CPU modules (IC693CPU341 uses a 3V lithium coin cell — CR2032 equivalent), and EPROM firmware corruption on Generation 1 CPUs. DriveKNMS applies the following test protocol to all Series 90-30 modules prior to shipment:

1. Visual inspection: PCB trace integrity, capacitor condition, connector pin alignment.
2. Power-on test: Module inserted into a live IC693 baseplate with known-good CPU; power rail voltages verified at ±5V, ±12V, and 24V.
3. Functional test: For CPU modules, a standard ladder logic program (discrete I/O scan, analog read, serial communication handshake) is executed and verified against expected outputs.
4. Communication test: IC693CMM321 Ethernet modules are tested for SRTP session establishment and Modbus TCP register read/write.
5. Burn-in: 4-hour continuous operation at ambient temperature before final packaging.