GE ACC-5595-208

Description

Product Description

The GE ACC-5595-208 is a versatile and high-performance I/O processor and communication module for the GE Fanuc Series 90-70 programmable logic controller (PLC). This module, often referred to as an “Application Coprocessor Module” (ACM) or Genius Bus Controller (GBC), serves as a powerful extension of the main CPU’s capabilities. Its primary function is to manage high-speed, deterministic communication over the GE Genius Bus network, acting as the master for a distributed I/O system. By offloading the communication processing from the main CPU, the GE ACC-5595-208 enables the Series 90-70 to efficiently control and monitor a large number of remote Genius I/O blocks, drives, and other devices. This module is critical for building scalable, distributed control architectures where I/O is spread across a large facility. The reliable performance of the GE ACC-5595-208 ensures seamless data exchange between the central controller and the field devices. Implementing this module effectively expands the system’s I/O capacity and geographic reach, making it a cornerstone for large-scale industrial automation projects using the Series 90-70 platform.

Product Parameters

• PLC Family: GE Fanuc Series 90-70.
• Module Type: Genius Bus Controller / Application Coprocessor Module.
• Function: Genius Bus Master for distributed I/O.
• Genius Bus Support: Manages a single Genius bus network.
• Data Transfer Rate: 153.6 kbaud (standard Genius bus speed).
• Maximum Devices: Can support up to 32 devices (a combination of remote I/O blocks and other Genius devices) on a single bus.
• Communication Port: Dedicated 9-pin D-sub connector for the Genius bus cable.
• Backplane Interface: Communicates with the Series 90-70 CPU via the VME backplane.
• On-board Processor: Contains its own microprocessor for autonomous bus management.
• Memory: Includes dual-port RAM for fast data exchange between the bus and the main CPU.
• Configuration: Configured via the Series 90-70 programming software (Proficy Machine Edition Logic Developer).

Advantages and Features

• Deterministic I/O Scanning: Provides fast, predictable, and consistent scanning of all remote Genius I/O on the network, which is essential for real-time control applications.
• Scalability and Distributed Architecture: Enables the placement of I/O blocks far from the central controller (up to 7500 feet per segment), reducing wiring costs and complexity for large installations.
• Reduced CPU Load: Offloads all Genius protocol handling from the main Series 90-70 CPU, freeing it to execute application logic more efficiently.
• Robust Network Diagnostics: The Genius protocol and module diagnostics provide clear status information for network health, simplifying troubleshooting of cable breaks or device failures.
• Proven Reliability: As a core component of a widely installed system, the GE ACC-5595-208 has a long track record of reliable performance in demanding industrial environments.

Application Cases in Application Fields

• Automotive Assembly Plants: Connects a central Series 90-70 PLC to hundreds of Genius I/O blocks controlling welding robots, clamp cylinders, and conveyor sections across a vast assembly line.
• Water and Wastewater Treatment Facilities: Distributes I/O to remote pump houses, chemical dosing stations, and filter beds, bringing all data back to a central control room.
• Large Material Handling Systems (Airports, Warehouses): Networks I/O from widely dispersed conveyor drives, sorters, and palletizers to a central controller.
• Food and Beverage Processing Plants: Connects I/O from filling machines, packaging units, and clean-in-place (CIP) systems spread across the production floor.

Comparisons with Competing Products

• Vs. GE’s own Series 90-30 Genius Module (IC693CMM321): The GE ACC-5595-208 is for the larger, more powerful Series 90-70 platform (VME bus), while the CMM321 is for the compact Series 90-30. They serve the same logical function but for different controller families.
• Vs. Allen-Bradley 1747-SN for SLC 500 (Remote I/O Scanner): Both modules allow a PLC to communicate with proprietary remote I/O (Genius vs. Allen-Bradley RIO). They are not interchangeable and represent competing ecosystem choices. The Genius bus typically offered longer distances.
• Vs. Modern Ethernet-based I/O (e.g., GE’s PACSystems with Genius NIU): Modern systems use Ethernet. The GE ACC-5595-208 represents a legacy, serial-based technology. Modern solutions offer higher bandwidth and IT integration, but the Genius system is renowned for its simplicity, determinism, and robustness in legacy installations.

Selection Suggestions and Precautions

1. System Compatibility: Ensure you have a compatible Series 90-70 CPU and VME rack. The GE ACC-5595-208 will not work in a Series 90-30 or newer PACSystems RX3i rack.
2. Bus Termination and Wiring: The Genius bus requires a proper terminating resistor at each physical end of the daisy-chain network. Incorrect termination is a common cause of communication errors. Use only approved Genius bus cable.
3. Device Addressing: Every device on the Genius bus (including all I/O blocks) must have a unique hardware address set via rotary switches. Duplicate addresses will cause the network to fail. The GE ACC-5595-208 itself also has a configured address.
4. Configuration in Programming Software: The module and the entire Genius network must be correctly configured in the Series 90-70 hardware configuration within Proficy Machine Edition. The I/O addresses for the remote blocks are mapped here.
5. Legacy System Consideration: The Genius bus and the GE ACC-5595-208 are legacy technologies. For new projects, consider migrating to a modern platform like PACSystems. This module should be sourced specifically for maintaining or expanding existing Series 90-70/Genius systems.

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