GE Series 90-30 IC693 Modules – IC693UDR005FP1

Technical Dossier

Product Details And Specifications

GE Fanuc Series 90-30 IC693 Series Technical Notes

The GE Fanuc Series 90-30 (IC693) is a modular programmable logic controller platform that has maintained a dominant installed base across global heavy industry since its commercial introduction in the late 1980s. Deployed extensively in chemical processing plants, petroleum refineries, nuclear auxiliary systems, pulp and paper mills, and municipal water treatment facilities, the IC693 architecture is characterized by its rack-based backplane design, deterministic scan-cycle execution, and broad I/O density options. Its longevity in service — with active installations spanning three decades — makes it one of the most widely maintained legacy PLC platforms in the world. The platform supports CPU modules ranging from entry-level fixed-I/O units to high-performance controllers with floating-point math, PID loops, and multi-rack expansion via the Series 90-30 bus. The IC693UDR005FP1 is a relay output combination unit within this family, combining discrete input and relay output capability in a compact fixed-I/O form factor suited for machine-level control and auxiliary panel applications.

The Evolution of IC693 Architecture

The Series 90-30 platform was introduced by GE Fanuc Automation in 1988 as a mid-range successor to the Series Six and Series Five PLC families. The original IC693 backplane supported 5-slot and 10-slot rack configurations with a proprietary parallel backplane bus operating at TTL logic levels. Early CPU modules — including the IC693CPU311 and IC693CPU313 — offered fixed memory maps and no floating-point support. By the mid-1990s, GE Fanuc introduced the IC693CPU364 and IC693CPU374, which added Ethernet connectivity and expanded program memory to 240KB, enabling integration with SCADA systems via SRTP (Service Request Transfer Protocol).

The IC693 platform underwent a significant architectural revision with the introduction of the Enhanced CPU series (IC693CPU350, IC693CPU360), which provided backward-compatible slot addressing while supporting structured text and function block programming under IEC 61131-3. The backplane bus remained electrically compatible across all generations, allowing mixed-generation rack configurations — a critical factor for facilities performing phased upgrades rather than full system replacements.

By 2010, GE Intelligent Platforms (the renamed successor to GE Fanuc) formally transitioned new design recommendations to the RX3i (IC695) platform, which uses a high-speed PCI backplane. The IC693 series entered a managed end-of-life phase, with GE announcing final production dates for most CPU and specialty modules between 2015 and 2020. As of 2026, the IC693 series is fully discontinued from OEM production, making third-party repair, refurbishment, and surplus sourcing the primary supply channel for maintenance operations.

IC693 Full Catalog & Functionalities (SKU List)

CPU Modules

• IC693CPU311: Entry-level CPU, 6KB program memory, no floating-point, 5-slot rack only
• IC693CPU313: Standard CPU, 12KB memory, supports analog I/O modules, serial port x1
• IC693CPU321: Mid-range CPU, 32KB memory, math functions, supports expansion racks
• IC693CPU331: Enhanced CPU, 80KB memory, PID loops, floating-point arithmetic
• IC693CPU340: Ethernet-ready CPU, 240KB memory, SRTP protocol, SNP/SNPX support
• IC693CPU350: High-performance CPU, 240KB, IEC 61131-3, dual serial ports
• IC693CPU360: Advanced CPU, 240KB, Ethernet port integrated, motion coordination
• IC693CPU364: Ethernet CPU, 240KB, 10/100 Mbps, embedded web server
• IC693CPU374: Top-tier Series 90-30 CPU, 512KB, dual Ethernet, high-speed counter support

Discrete Input Modules

• IC693MDL230: 8-point 120VAC discrete input module, isolated commons
• IC693MDL240: 16-point 120VAC discrete input, standard density
• IC693MDL241: 16-point 24VDC discrete input, positive logic, high-speed capable
• IC693MDL260: 32-point 24VDC discrete input, high-density, dual connector

Discrete Output Modules

• IC693MDL310: 8-point relay output, 2A per point, Form A contacts
• IC693MDL330: 8-point 120VAC triac output, isolated, 0.5A per point
• IC693MDL340: 16-point 120VAC output, standard density
• IC693MDL741: 32-point 24VDC output, high-density, source type

Combination / Fixed I/O Units

• IC693UDR005FP1: 20-point fixed I/O relay output unit, 12 DC inputs / 8 relay outputs, DIN-rail mount, 24VDC supply
• IC693UDR010: 20-point fixed I/O unit, relay output variant, expanded terminal block

Analog Modules

• IC693ALG220: 4-channel analog input, 4–20mA / 0–10V selectable, 12-bit resolution
• IC693ALG390: 4-channel analog output, 4–20mA, 12-bit DAC
• IC693ALG442: 8-channel analog input, high-density, 16-bit resolution

Communication & Specialty Modules

• IC693CMM311: Serial communications module, RS-232/RS-485, SNP/SNPX/Modbus RTU
• IC693CMM321: Ethernet interface module, 10 Mbps, SRTP, legacy rack integration
• IC693PBS301: PROFIBUS-DP slave adapter, 12 Mbps, GSD file configurable

Power Supply Modules

• IC693PWR321: 120/240VAC input power supply, 30W output, standard rack
• IC693PWR322: 24VDC input power supply, 30W, battery-backed logic power
• IC693PWR330: High-capacity power supply, 120/240VAC, 40W, supports expanded I/O racks

Sourcing Hard-to-Find & Obsolete IC693 Parts

For facilities operating under IEC 61511 functional safety requirements or NRC-regulated environments, DriveKNMS provides full traceability documentation including test records, visual inspection reports, and firmware version verification for each unit shipped. Modules sourced through DriveKNMS are cross-referenced against GE Fanuc's original part number taxonomy to prevent substitution errors between hardware revisions (e.g., IC693CPU364 Rev A vs. Rev C backplane pinout differences).

Quality Control for the IC693 Range

IC693 modules present specific test challenges due to their parallel backplane bus architecture and the age-related degradation patterns common in CMOS-based logic from the 1990s manufacturing era. DriveKNMS applies a structured test protocol to all IC693 units prior to shipment:

• Backplane bus integrity test: Each module is seated in a known-good IC693 rack and subjected to full backplane communication verification, confirming correct slot addressing and data transfer without bus contention errors.
• Power rail verification: +5V, +24V, and isolated I/O power rails are measured under load conditions to confirm regulation within GE Fanuc's published tolerance bands (±5% for logic rails).
• I/O point functional test: All discrete input and output points are individually exercised. Relay output modules are tested for contact resistance (target <100mΩ per point) and coil actuation voltage thresholds.
• CPU memory and program execution test: CPU modules are loaded with a standardized ladder logic test program covering timer, counter, math, and PID function blocks. Scan time is measured and compared against GE Fanuc's published benchmark values.
• Communication port test: Serial and Ethernet ports are verified using SNP handshake sequences and SRTP read/write transactions to a test PLC.
• Thermal soak: Units are operated at 50°C ambient for a minimum of 2 hours to screen for latent thermal failures in electrolytic capacitors and voltage regulators.