IC660ELB922 - MicroGENI ISA Interface Card

SPECIFICATIONS:

Part No: IC660ELB922
Series: Genius I-O
Manufacturer: GE Fanuc
Series: PC Interface Module (PCIM)
Product Description: MicroGENI daughterboard
Compatible PCIM Card: Dual-channel PCIM
Memory Requirement: 16 Kbytes
Power Requirement: 5 Volts DC, 400 milliamps
Current consumption: 1.0 Ampere
Memory Requirement: 16K bytes
Status LEDs: GENI OK, COMMS OK
Communication protocol: Genius Protocol
No. of supported devices: 30 per daughtercard
Compatibility: IBM PC/ AT/ XT
LED indicators: GENI OK; COMMS OK
Communicate rate: 38.4K, 76.8K, 153.6K standard, or 153.6K extended baud rates.
Ambient Operating Temperature: 0 to 60
Shared Memory: 16KB
Weight: 3 Pounds
Storage temperature: - 40 °C to +70 °C
Product Lifecycle: Discontinued by Manufacturer
Availability: In Stock
Country of Origin: USA

FUNCTIONAL DESCRIPTION:

IC660ELB922 is a MicroGENI ISA Interface Card manufactured and designed by General Electric as part of the Mark II Series used in GE Speedtronic Gas Turbine Control Systems. The IC660ELB922 supports two independent LAN connections, each extending up to 7,500 feet. It is fully compatible with a hand-held monitor (HHM) and can operate with any GE Fanuc Genius bus controller. The card integrates seamlessly with all Genius protocols across all levels. The module provides access to 8,000 inputs and 8,000 outputs. When configured as input-only, it reads data exclusively from Genius blocks, while in output-only mode, it writes solely to Genius block outputs. Additionally, the board serves as an entry point into the Genius I/O System for IBM PC/AT/XT series systems. Designed as an AT-type computer interface, it is intended for integration into user-developed microprocessor applications.

It provides the host computer with a full-function bus controller for Genius I/O networks. It is available in both PC-104 and VME form factors and serves as a replacement for the earlier IC660ELB906 two-slot card. The module is equipped with two daughterboards, each designed to provide a cost-effective tap onto the Genius I/O bus. This configuration enables the host computer to manage remote I/O while taking advantage of the comprehensive diagnostics, high reliability, and noise immunity of the Genius I/O System. With the supplied configuration software, daughterboards can be set up and managed independently. Connection to the Genius bus is achieved through board-edge connectors. Since the IC660ELB922 supports two daughterboards, they may be connected to a single Genius bus or to separate independent buses for added flexibility.

DAUGHTERBOARD:

The PCIM daughterboard is a general-purpose I/O controller designed for use with the Genius I/O System, providing a convenient and efficient method of managing devices on the Genius serial bus. It takes on the critical housekeeping responsibilities of initialization, communication, and fault management for up to 30 connected bus devices, ensuring smooth and reliable operation of the system. In addition, the PCIM daughterboard maintains up-to-date real-time I/O images for every device on the network, whether they are Genius I/O Blocks or other Genius-compatible bus devices. This continuous data management allows the host computer to have an accurate view of the entire system at any given time, supporting faster response, streamlined control, and increased reliability.

Beyond standard I/O management, the PCIM daughterboard also enables controller-to-controller communication on the Genius bus by passing background messages that are not tied to I/O commands or Global Data. This feature enhances coordination between multiple controllers, enabling advanced system diagnostics, configuration sharing, and distributed control strategies. To support high-speed operations, the board is equipped with dedicated RAM that stores I/O data, with an interface optimized for the IBM personal computer bus architecture, ensuring low-latency access and compatibility with PC/AT/XT-based systems. By combining robust communication, comprehensive fault handling, and efficient data management, the PCIM daughterboard delivers a dependable solution for integrating Genius I/O networks into industrial control systems.

OPERATION:

All input lines to the PCIM present no more than a single standard LSTTL load to the host interface connector, ensuring minimal loading on the host system. The output lines from the PCIM are designed to drive up to 10 standard LSTTL loads and, except for the /INT and /PCIM OK lines, function as tri-state outputs. The /INT line is an open-collector output, allowing it to be wired-ORed to a single interrupt input, while the /PCIM OK and /COMM OK lines are low-true, open-collector outputs with built-in current limiting of 10 mA, making them suitable for directly driving indicator LEDs.

All input signals from the host system to the PCIM appear as one LSTTL load and are fully TTL-compatible, switching reliably at TTL logic levels. The control output signals to the host are implemented with open-collector LSTTL drivers equipped with 10K resistive pull-ups, capable of sinking 4 mA while maintaining a maximum output voltage of 0.4V. For data handling, the PCIM employs a tri-state LSTTL transceiver that can source or sink up to 12 mA, with guaranteed output levels of VOL = 0.4V and VOH = 2.0V. Designed for robust integration, the PCIM is fully compatible with ISA backplanes, ensuring broad system applicability and dependable performance.

WORLD OF CONTROLS maintains the largest stock of replacement spare parts for GE Speedtronic Gas Turbine Control Systems and provides expert repairs for faulty boards, restoring them to full operational performance. We also supply unused and rebuilt parts, all backed by a comprehensive warranty, ensuring reliability and quality. Our team of automation and control experts is available 24/7 to support your OEM needs, offering technical guidance, troubleshooting, and recommendations to maintain uninterrupted turbine operations. For pricing, availability, or service inquiries, contact our team via phone or email and benefit from WOC’s extensive inventory, technical expertise, and prompt support for all turbine control requirements.

FREQUENTLY ASKED QUESTIONS:

What type of load do the PCIM input lines present to the host system?

The PCIM input lines present no more than one standard LSTTL load to the host connector. This keeps the load on the host system very light, ensuring reliable operation without signal degradation. Since the inputs are TTL-compatible, they can switch cleanly at standard TTL voltage levels.

How many loads can the PCIM output lines drive?

The PCIM output lines are capable of driving up to 10 standard LSTTL loads. This makes the board efficient in handling multiple devices without external buffering. All lines, except the /INT and /PCIM OK lines, operate as tri-state outputs for added flexibility.

What are the characteristics of the control output signals to the host?

The control output signals use open-collector LSTTL drivers with 10K resistive pull-ups. They are capable of sinking 4 mA while maintaining a logic-low voltage of 0.4V or lower. This design ensures reliable communication with the host without exceeding electrical limits.