IS200VCMIH1B - Bus Master Controller Board

SPECIFICATIONS:

Number of channels: 12
Board Type: 6U High VME Board
Power supply voltage: 28 V dc
Voltage Range: 14 to 32 V dc
Processor: TMS320C32 32-Bit
Memory: Dual Port Memory
Communication: H1 Version
Frame rate: 10 ms
Mounting: DIN-rail mounting
Technology: Surface mount
Operating temperature: -30 to 65°C
Size: 17.8 cm wide x 33.02 cm
Repair: 3-7 Day
Availability: In Stock
Country of Origin: United States
Manual: GEH-6421H

DESCRIPTION:

IS200VCMIH1B is a Bus Master Controller Board manufactured and designed by General Electric as part of the Mark VI Series used in GE Speedtronic Gas Turbine Control Systems. The VCMI board in the control and interface module communicates internally to the I/O boards in its rack, and to the other VCMI cards through the IONet. There are two versions, one with one Ethernet IONet port for simplex systems, and the other with three Ethernet ports for TMR systems. Simplex systems have one control module connected to one or more interface modules using a single cable. The VCMI with three separate IONet ports is used in TMR systems for communication with the three I/O channels Rx, Sx, and Tx, and with the two other control modules. Software Implemented Fault Tolerance (SIFT) voting is implemented in the VCMI board. Input data from each of the IONet connections is voted in each of the R, S, and T VCMI boards. The results are passed to the control signal database in the controllers (labeled UCVx in the diagram) through the backplane VME bus.

In TMR mode, the VCMI voter in the control module is always the Master of the IONet and also provides the IONet clock. Time synch messages from the time source on the UDH are sent to the controllers and then to the VCMIs. All input data from a single rack is sent in one or more IONet packets (approximately 1500 bytes per packet maximum). The VCMI in the control module broadcasts all data for all remote racks in one packet, and each VCMI in the remote rack extracts the appropriate data from the packet.

IONet:

• The IONet connection on the VCMI is a BNC for 10Base2 Ethernet. The interface circuit is high impedance allowing “T” tap connections with 50 Ω terminal at the first and last node.
• The cabling distances are restricted to 185 meters per segment with up to eight nodes, using RG-58C/U or equivalent cable. The Link Layer protocol is IEEE 802.3 standard Ethernet.
• The application layer protocol uses Asynchronous Device Language (ADL) messaging with special adaptations for the input/output handling and the state exchanges.
• The VCMI board acts as the IONet Master and polls the remote interface module for data. The VCMI Master broadcasts a command to all slave stations on a single IONet causing them to respond with their message consecutively.
• To avoid collisions on the media, each station is told how long to delay before attempting to transmit. Utilizing this Master/slave mechanism, and running at 10 Mb/s, the IONet is capable of transmitting a 1000-byte packet every millisecond (8 MHz bit rate).

I/O Boards:

• Most I/O boards, are single-width VME boards, of similar design and front cabinet, using the same digital signal processor (TMS320C32).
• The central processing unit (CPU) is a high-speed processor designed for digital filtering and for working with data in IEEE 32-bit floating point format.
• The task scheduler operates at a 1 ms and 5 ms rate to support high-speed analog and discrete inputs.
• The I/O boards synchronize their input scan to complete a cycle before being read by the VCMI board.
• Contact inputs in the VCCC and VCRC are time-stamped to 1 ms to provide a sequence of events (SOE) monitor.

WOC has the largest stock of GE Speedtronic Gas Turbine Control System Replacement Parts. We can also repair your faulty boards. WORLD OF CONTROLS can also supply unused and rebuilt backed-up with a warranty. Our team of experts is available round the clock to support your OEM needs. Our team of experts at WOC is happy to assist you with any of your automation requirements. For pricing and availability on any parts and repairs, kindly get in touch with our team by phone or email.

FREQUENTLY ASKED QUESTIONS:

What is a Bus Master Controller Board?

A Bus Master Controller Board is a hardware component used in computer systems to manage and control data transfer between different devices connected to the system bus.

What is the function of the Bus Master Controller Board?

The primary function of the Bus Master Controller Board is to optimize data transfer efficiency by allowing devices to directly access system memory without involving the CPU, thereby reducing CPU overhead and improving overall system performance.

What are some common applications of Bus Master Controller Boards?

Bus Master Controller Boards are commonly used in various computing systems such as servers, workstations, and embedded systems where high-speed data transfer and efficient resource utilization are essential.