IS200VCCCH1A - Contact Input Relay Output Card

SPECIFICATIONS:

Part Number: IS200VCCCH1A
Manufacturer: General Electric
Series: Mark VI
Product Type: Contact Input Relay Output Card
Number of channels: 48 channels
Input Contact Excitation Voltage: 125 V DC
Input Isolation: 1500 V
Input Filter: 4 ms
AC Voltage Rejection: 60 V rms
Frequency: 3.2 ±0.2 kHz
Max response time on: 25 ms
Power supply current: 5 A dc
Mounting: DIN-rail mounting
Technology: Surface mount
Measurement accuracy: 53 mV
Maximum Distance: 300 m
Operating temperature: -30° to 65°C
Size: 33.02 cm high x 17.8 cm wide
Repair: 3-7 Days
Availability: In Stock
Country of Origin: United States
Manual: GEH-6721G

FUNCTIONAL DESCRIPTION:

IS200VCCCH1A is a Contact Input Relay Output Card manufactured and designed by General Electric as part of the Mark VI Series used in GE Speedtronic Gas Turbine Control Systems. The Contact Input/Relay Output Board (VCCC), along with its daughterboard, is designed to handle 48 discrete inputs and 24 relay outputs across four terminal boards, providing reliable interfacing for GE Mark VI control systems. As a double-width VME module, it mounts in the VME I/O rack and connects via two sets of J3/J4 plugs to the TBCI input and TRLY output terminal boards, ensuring secure signal transfer. For compact installations, the VCRC board offers identical functionality in a single-slot design without a daughterboard, making it an ideal space-saving alternative.

CONTACT INPUTS:

The Contact Input section of the VCCC board is designed to efficiently manage 48 discrete dry contact inputs for critical turbine monitoring. The first 24 inputs are connected to a dedicated contact input terminal board (TBCI), while the remaining 24 inputs are routed to a second TBCI board, ensuring organized and scalable wiring. Each input receives DC excitation power, and molded connector cables securely link the terminal boards to the VCCC processor board within the VME rack. The system supports high-speed scanning and recording at a 1 ms rate, enabling real-time monitoring of essential turbine parameters. All input changes, including contact openings and closures, are captured by the Sequence of Events (SOE) recorder with 1 ms time resolution, allowing precise tracking of operational sequences. Additionally, the system can detect and report contact chatter and short pulse widths down to 6 ms, ensuring that even rapid or transient events are accurately logged for analysis and safety monitoring.

RELAY OUTPUTS:

The Relay Output section of the VCCC board is managed by the TRLYH1B board, which houses twelve plug-in magnetic relays designed for flexible control and protection applications. The first six relay circuits are configurable via jumpers to operate as either dry Form-C contact outputs or to drive external solenoids, providing versatile options for field control. These relays can be powered from a standard 125 V DC or 115 V AC source, with an optional 24 V DC supply available for specific applications. Each relay includes jumper-selectable fuses and on-board suppression circuitry to protect both the relay and connected equipment. Relays 7 through 11 function as unpowered isolated Form-C contacts, suitable for signal or control applications that do not require direct power. The 12th relay output is an isolated Form-C contact reserved for specialized tasks, such as controlling ignition transformers or other critical equipment, ensuring safe and reliable operation within the turbine control system.

VCRC OPTION:

The VCRC board provides the same functionality as the VCCC board, supporting 48 discrete contact inputs and 24 relay outputs, but is designed as a single-slot VME module, eliminating the need for a separate daughterboard. This compact design is ideal for installations where rack space is limited or where a more streamlined configuration is preferred. The VCRC board receives contact inputs from the TBCI boards through two front-panel connectors, J33 and J44, while relay outputs are routed via the J3 and J4 ports on the VME rack, identical to the VCCC configuration. This ensures seamless integration with existing VME racks and terminal boards. In cases where front-panel cable routing is undesirable or more flexibility is required, the double-width VCCC module remains the preferred choice, offering easier access for cable connections and maintenance.

INSTALLATION:

• Power down the VME I/O processor rack
• Slide in the VCCC board and push the top and bottom levers in with your hands to seat its edge connectors
• Tighten the captive screws at the top and bottom of the front panel
• Power up the VME rack and check the diagnostic lights at the top of the front panel

Cable connections to the TBCI terminal boards are made at the J3 and J4 connectors on the lower portion of the VME rack, the right-hand set. These are latching-type connectors to secure the cables. Cable connections to the TRLY terminal boards are made to the left-hand set of J3 and J4 connectors.

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) supply (TBCIH1) or from a floating 24 V dc (18.5 – 32 V dc) supply (TBCIH2). 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 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-energize the corresponding relays. Similarly, if communication with the associated VME board is lost, the relays de-energize.

WOC is proud to offer the largest stock of OEM Replacement parts for GE Speedtronic Gas Turbine Control Systems, ensuring you have access to the critical components you need for maintenance, upgrades, or replacements. In addition to supplying genuine parts, we specialize in repairing faulty boards and providing unused and professionally rebuilt boards, all supported by a reliable warranty to guarantee performance and peace of mind. Our team of experts is available round the clock to offer technical guidance and solutions tailored to your automation and control system requirements. Committed to maximizing uptime and operational efficiency, we are always ready to assist with any OEM needs, from parts procurement to repairs. For pricing, availability, or support, please contact our team via phone or email at WOC. Your automation challenges are our top priority, and we are dedicated to delivering fast, reliable, and expert solutions.

FREQUENTLY ASKED QUESTIONS:

What is the IS200VCCCH1A?

The IS200VCCCH1A is a Contact Input Relay Output Card manufactured by General Electric as part of the Mark VI Speedtronic Gas Turbine Control System. It is designed to accept 48 discrete inputs and control 24 relay outputs through terminal boards.

What is the difference between VCCC and VCRC?

The VCCC is a double-width VME module with a daughterboard, while the VCRC offers the same functionality in a single-slot design without a daughterboard. VCRC is ideal for compact installations, whereas VCCC provides easier access for front-panel cable connections.

How are the contact inputs connected?

The first 24 dry contact inputs connect to the first TBCI terminal board, and inputs 25–48 connect to a second TBCI board. The inputs are powered by DC excitation voltage, with high-speed scanning at 1 ms for accurate monitoring.

How are the relay outputs configured?

The TRLYH1B board houses 12 plug-in magnetic relays. Relays 1–6 are configurable for dry Form-C contacts or solenoid drive, relays 7–11 are isolated Form-C contacts, and relay 12 is an isolated Form-C contact for special applications such as ignition transformers.