GE Series 90-30 IC693ACC307A Bus Terminal Plug

Technical Dossier

Product Details And Specifications

GE Series 90-30 (IC693) Technical Notes

The GE Series 90-30, identified by the IC693 part number prefix, is one of the most widely deployed programmable logic controller platforms in global heavy industry. Installed across petrochemical refineries, nuclear power generation facilities, offshore oil & gas platforms, pulp and paper mills, and large-scale water treatment infrastructure, the Series 90-30 established a benchmark for modular, rack-based control architecture throughout the 1990s and 2000s. Its distributed I/O capability, deterministic scan cycle, and broad third-party integration support made it the default selection for process engineers requiring a mid-range PLC with enterprise-level reliability. The IC693ACC307A Bus Terminal Plug is a critical passive interconnect component within this ecosystem, providing the physical backplane bus termination required for proper signal integrity across the IC693 rack system.

The Evolution of Series 90-30 (IC693) 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 architecture is built around a passive backplane bus that supports up to 10 modules per rack, with expansion racks connected via the IC693CBL series cables. The CPU module communicates with I/O modules over a proprietary parallel bus, a design that prioritized deterministic scan performance over the serial fieldbus approaches that would later dominate the market.

Early revisions of the platform (CPU311, CPU313) offered limited memory and fixed I/O counts. Subsequent generations introduced the CPU340, CPU350, CPU360, and CPU374, progressively adding floating-point math, Ethernet connectivity, and expanded program memory. The IC693CMM321 and IC693CMM311 communication modules extended the platform into PROFIBUS-DP and DeviceNet networks respectively, enabling integration with distributed field devices without replacing the core CPU infrastructure.

IC693 Full Catalog & Functionalities (SKU List)

CPU & Controller Modules

• IC693CPU311: Entry-level CPU, 6K word program memory, fixed serial port
• IC693CPU313: Mid-range CPU, 12K word memory, expanded I/O capacity
• IC693CPU340: Advanced CPU with floating-point, 240K word memory
• IC693CPU350: High-performance CPU, 240K word, built-in Ethernet port
• IC693CPU360: Enhanced CPU350 with dual Ethernet and expanded diagnostics
• IC693CPU374: Top-tier CPU, 512K word memory, redundancy-capable

Discrete Input Modules (DI)

• IC693MDL230: 8-point 120VAC discrete input module
• IC693MDL240: 16-point 120VAC discrete input module
• IC693MDL241: 16-point 24VDC positive logic discrete input
• IC693MDL260: 32-point 24VDC discrete input, high-density

Discrete Output Modules (DO)

• IC693MDL310: 8-point relay output module, 2A per point
• IC693MDL340: 16-point 120VAC triac output module
• IC693MDL741: 16-point 24VDC positive logic discrete output
• IC693MDL752: 32-point 24VDC discrete output, high-density

Analog I/O Modules (AI/AO)

• IC693ALG220: 4-channel analog input, 4–20mA / 0–10V configurable
• IC693ALG390: 8-channel analog input, 12-bit resolution
• IC693ALG442: 4-channel analog output, 12-bit, 4–20mA

Communication & Network Modules

• IC693CMM311: DeviceNet master/slave communication module
• IC693CMM321: PROFIBUS-DP master communication module
• IC693CMM302: Genius Bus Controller for GE Genius I/O network

Power Supply Modules

• IC693PWR321: 120/240VAC input power supply, 30W output
• IC693PWR322: 24VDC input power supply, 30W output
• IC693PWR330: High-capacity 120/240VAC power supply, 40W

Rack & Interconnect Components

• IC693CHS391: 5-slot base rack for Series 90-30
• IC693CHS392: 10-slot base rack for Series 90-30
• IC693ACC307A: Bus terminal plug — terminates the backplane bus on the final rack in a multi-rack configuration, preventing signal reflection and ensuring bus integrity

Sourcing Hard-to-Find & Obsolete IC693 Parts

As the Series 90-30 platform has entered its mature lifecycle phase, OEM production of select modules has been reduced or discontinued. End users operating these systems in regulated or continuous-process environments face sourcing challenges for low-volume components such as the IC693ACC307A bus terminal plug, legacy CPU modules (IC693CPU311, IC693CPU313), and early-revision communication modules.

Quality Control for the IC693 Range

• Backplane bus continuity and termination impedance verification for passive components including the IC693ACC307A
• CPU module functional test using a reference rack with known-good I/O modules, including program load/execute cycle and watchdog timer validation
• I/O module point-by-point functional test under rated voltage and current conditions
• Communication module protocol handshake verification (PROFIBUS-DP, DeviceNet, Genius Bus) using network analyzers
• Power supply load regulation test across 0–100% rated output with ripple measurement
• Visual inspection for capacitor aging, PCB corrosion, and connector wear on all modules
• Firmware revision identification and documentation for CPU and communication modules