GE Fanuc Series Six IC630 Modules — IC630MDL357A Output Module

Technical Dossier

Product Details And Specifications

GE Fanuc Series Six (IC630) PLC: Comprehensive Module Range and Technical Overview

The GE Fanuc Series Six programmable logic controller platform — identified by the IC630 part number prefix — represents one of the most widely deployed legacy PLC architectures in global heavy industry. Installed across petrochemical refineries, nuclear power generation facilities, chemical processing plants, pulp and paper mills, and continuous manufacturing lines, the Series Six established GE Fanuc's position as a tier-one automation supplier throughout the 1980s and 1990s. Its modular backplane architecture, deterministic ladder logic execution, and robust I/O density made it the default choice for large-scale process control applications where uptime is measured in decades, not years. Today, thousands of Series Six systems remain in active service, creating sustained global demand for original replacement modules, tested spares, and lifecycle extension support.

The Evolution of Series Six (IC630) Architecture

The Series Six platform was introduced in the early 1980s as a successor to GE's Series One and Series Three controllers, designed to address the scaling demands of large distributed manufacturing and process environments. The architecture is built around a parallel backplane bus that supports up to 12 modules per rack, with the CPU module occupying a fixed slot and all I/O modules communicating via a shared data highway.

Early Series Six deployments used the IC630CPU300 and IC630CPU301 processors, which operated at clock speeds sufficient for scan times in the 5–50 ms range depending on program size. As the platform matured, GE Fanuc introduced enhanced CPU variants with expanded memory and faster I/O scan capabilities. The I/O subsystem evolved in parallel: early discrete modules supported 8- and 16-point configurations, while later generations introduced 32-point high-density modules and analog I/O with 12-bit resolution.

Compatibility across Series Six generations is constrained by backplane slot addressing and power budget. Mixing early-generation CPUs with late-generation high-density I/O modules requires verification of firmware revision levels and rack power supply ratings. The platform reached end-of-production in the late 1990s, transitioning users toward the GE Fanuc Series 90 (90-30, 90-70) architecture. However, the installed base remained large enough that GE (later Emerson, then Proficy) continued to offer limited spare parts support into the 2010s. The platform is now fully in the obsolescence phase, with all sourcing dependent on aftermarket inventory.

IC630 Series Six Full Catalog & Functionalities (SKU List)

CPU & Processor Modules

• IC630CPU300: Series Six CPU, 6K word memory, parallel backplane master
• IC630CPU301: Enhanced CPU, extended program memory, faster scan cycle
• IC630CPU302: High-performance CPU with expanded I/O table support
• IC630CPU303: Series Six CPU with integrated diagnostics and fault logging

Discrete Output Modules

• IC630MDL357A: 120VAC discrete output module, 16-point, isolated, relay-compatible — the subject of this listing
• IC630MDL350: 120VAC output module, 8-point, standard current rating
• IC630MDL351: 240VAC output module, 8-point, high-voltage discrete output
• IC630MDL352: DC output module, 24VDC, 16-point, sourcing type
• IC630MDL353: DC output module, 24VDC, 16-point, sinking type
• IC630MDL358: 120VAC output module, 32-point high-density, triac output

Discrete Input Modules

• IC630MDL300: 120VAC discrete input module, 16-point, standard filter
• IC630MDL301: 240VAC discrete input module, 8-point, high-voltage input
• IC630MDL302: 24VDC discrete input module, 16-point, sourcing
• IC630MDL303: 24VDC discrete input module, 32-point, high-density
• IC630MDL304: 5VDC TTL input module, 32-point, logic-level interface

Analog I/O Modules

• IC630MDL530: Analog input module, 4-channel, 4–20mA / 0–10V, 12-bit resolution
• IC630MDL531: Analog input module, 8-channel, differential, 12-bit
• IC630MDL560: Analog output module, 4-channel, 4–20mA, 12-bit DAC

Power Supply Modules

• IC630PWR300: Series Six rack power supply, 120/240VAC input, 5VDC/8A output
• IC630PWR301: Enhanced power supply, dual-voltage output, rack-mount

Communication & Specialty Modules

• IC630CMM300: Series Six communications module, Genius Bus interface
• IC630CMM301: Data highway adapter, peer-to-peer network interface

Sourcing Hard-to-Find & Obsolete IC630 Series Six Parts

The GE Fanuc Series Six platform has been out of production for over two decades. OEM support channels are closed, and authorized distributor stock was exhausted years ago. For facilities operating Series Six systems — particularly in regulated industries such as nuclear power, refining, and chemical processing where control system replacement projects require multi-year qualification cycles — the only viable sourcing path is the specialist aftermarket.

DriveKNMS maintains a dedicated inventory of tested Series Six modules, including hard-to-find CPU variants, high-density I/O modules, and power supplies. Our sourcing network spans decommissioned plant equipment, surplus industrial auctions, and direct acquisition from facilities that have completed migration projects. Every unit is catalogued by part number, revision level, and functional test status before being offered for sale. For critical spares programs, we can provide quantity commitments and long-term hold agreements to support planned maintenance schedules.

Quality Control for the IC630 Series Six Range

Series Six modules present specific test challenges due to their parallel backplane bus architecture and the age-related failure modes common to 30–40-year-old industrial electronics. DriveKNMS applies a structured test protocol to all IC630 modules prior to dispatch:

• Visual and physical inspection: PCB examination for corrosion, capacitor bulge, burned traces, and connector pin integrity. Backplane edge connectors are cleaned and inspected under magnification.
• Power-on functional test: Each module is installed in a live Series Six test rack and powered through a full initialization cycle. CPU modules are loaded with a diagnostic ladder program and executed through multiple scan cycles.
• I/O point verification: All discrete input and output points are individually exercised. Analog modules are tested against calibrated signal sources and loads, with linearity and offset measurements recorded.
• Bus communication test: Modules are verified for correct backplane communication, including data highway and Genius Bus interface modules where applicable.
• Burn-in period: Selected modules undergo a 24-hour powered burn-in to screen for early-life failures in aged components.
• Documentation: Test results are recorded per unit and accompany the shipment. Revision labels and firmware versions are documented where readable.