IS200VCCCH1BBA - Contact Input/Relay Output Board

SPECIFICATIONS:

Part Number: IS200VCCCH1BBA
Manufacturer: General Electric
Series: Mark VI
Function: Contact Input/Relay Output Board
Number of Channels: 48
Input Contact Excitation Voltage: 145 VDC
Input Voltage: 230V AC
Output Voltage: 2.5–7.5V DC
Input Isolation: 1500 V
Max Response time ON: 25 ms
AC Voltage Rejection: 60 Vms
Output Current: Up to 4A
Size: 26.04 cm x 18.73 cm
Weight: 2.95 kg
Repair: 3-5 Days
Operating Temperature: 0 to 60 °C
Availability: In Stock
Country of Manufacture: United States (USA)
Manual: GEH-6421H

FUNCTIONAL DESCRIPTION:

IS200VCCCH1BBA is a Contact Input/Relay Output Board manufactured and designed by General Electric as part of the Mark VI Series used in GE Speedtronic Control Systems. The Contact Input/Relay Output Board (VCCC) with its associated daughterboard accepts 48 discrete inputs and controls 24 relay outputs from a total of four terminal boards. VCCC is a double-width module and mounts in the VME I/O rack. This rack has two sets of J3/J4 plugs for cables to the TBCI and TRLY terminal boards. VCRC is a narrower board and can be used instead of the VCCC.

CONTACT INPUTS:

The first 24 dry contact inputs are wired to a contact input terminal board (TBCI), and a second terminal board is required for inputs 25 - 48. DC power for the contacts is provided. Cables with moulded plugs connect the terminal board to the VME rack, where the VCCC processor board is located. High-speed scanning and recording at a 1-ms rate is available for input monitoring of important turbine variables. The sequence of events (SOE) recorder reports all contact openings and closures with a time resolution of 1 ms. Contact chatter and pulse widths down to 6 ms are reported.

RELAY OUTPUTS:

TRLYH1B holds twelve plug-in magnetic relays. The first six relay circuits can be jumpers configured for either dry, Form-C contact outputs or to drive external solenoids. A standard 125 V dc or 115 V ac source, or an optional 24 V dc source, with individual jumper-selectable fuses and on-board suppression can be provided for field solenoid power. The next five relays (7 - 11) are unpowered isolated Form-C contacts. Output 12 is an isolated Form-C contact, used for special applications such as ignition transformers.

VCRC OPTION:

The VCRC board has the same functionality as the VCCC board but takes up only one VME slot since there is no daughter board required. Two front panel connectors, J33 and J44, accept the contact inputs from the TBCI boards. Relay outputs on TRLY use the J3 and J4 ports on the VME rack, the same as for VCCC. If locating cables on the front panel is undesirable, VCCC can be used instead.

OPERATION:

In the VCCC, the input voltages pass through optical isolators and are sampled at the frame rate for control functions and at 1 ms for SOE reporting. The signals are transferred over the VME backplane to the VCMI. The VCMI then sends them to the controller. The contact input processing is shown in the following figure. The dry-contact inputs are powered from a floating 125 V dc (100 - 145 V dc). Filters reduce high-frequency noise and suppress surge on each input near the point of signal exit. Noise and contact bounce are filtered with a 4 ms filter. AC voltage rejection (50/60 Hz) is 60 V rms with 125 V dc excitation.

For TMR applications, contact input voltages are fanned out to three VME board racks, R, S, and T, via plugs JR1, JS1, and JT1. The signals are processed by the three VCCCs, and the results are voted on by the VCMI board in each controller rack. Cables carry relay control signals plus monitor feedback voltages between VCCC and TRLY. Relay drivers, fuses, and jumpers are mounted on the relay board. Several types of relay boards can be driven, including TRLY, DRLY, and SRLY. The relay outputs have failsafe features so that when a cable is unplugged, the inputs vote to de-energise the corresponding relays. Similarly, if communication with the associated VME board is lost, the relays de-energise.

WORLD OF CONTROLS is a trusted global supplier of GE Speedtronic Control System replacement parts, maintaining the largest and most comprehensive inventory of new, rebuilt, and unused modules, each fully tested and backed by a warranty to ensure maximum reliability and system uptime. We specialise in repairing faulty boards to strict OEM specifications, providing fully restored components that reduce downtime, extend equipment life, and safeguard critical operations. Our team of highly skilled engineers and technical experts is available 24/7, offering prompt guidance, rapid-response repairs, and tailored solutions for all your automation and control system needs. Whether you require urgent support, preventive maintenance, or expert advice on system optimisation, WOC delivers professional, dependable, and customised service to keep your operations running smoothly. For pricing, availability, or technical assistance, simply contact us by phone or email and experience fast, reliable support designed to meet your exact requirements.

FREQUENTLY ASKED QUESTIONS:

What is the IS200VCCCH1BBA?

The IS200VCCCH1BBA is a Contact Input/Relay Output Board from GE’s Mark VI Series, designed for GE Speedtronic Control Systems. It processes discrete inputs from turbine or automation systems and controls relay outputs. The board ensures accurate monitoring, sequencing, and reliable system operation.

How many inputs and outputs does it support?

It supports 48 discrete contact inputs and 24 relay outputs. The inputs are monitored at high speed for critical variables, while the relays control field devices and other system functions. This allows precise control and sequence-of-events recording.

What is the difference between VCCC and VCRC boards?

The VCCC is a double-width board with a daughterboard, providing full functionality for standard VME racks. The VCRC is a single-slot version with the same capabilities but without a daughterboard, saving rack space. Both perform identical input/output processing.