Mark VI Contact Input Termination Board IS200TBCIS2CCD GE

Product Overview

The GE IS200TBCIS2CCD functions as a high-integrity contact input termination board within the General Electric Mark VI Speedtronic turbine control matrix. This hardware card coordinates and routes up to 24 dry contact discrete inputs from field-level safety machinery, limit switches, and pressure sensors directly into the active VME processor rack layer. It supplies the necessary DC excitation voltage to the external contact loops and isolates delicate control-room logic chips from field-side electrical interference. By acting as the physical terminal layer, this board ensures crisp, dependable digital state transition monitoring for critical industrial sequencing and power plant process controls.

We supply this technical component exclusively as 100% brand new, original factory-sealed stock to guarantee pristine connection surfaces and maximum hardware lifespans inside your automation cabinets.

Technical Specifications

The IS200TBCIS2CCD incorporates barrier-style terminal blocks, high-attenuation passive noise filters, and heavy-duty ribbon cable connectors on a ruggedized baseplate. The table below outlines the definitive operational and environmental specifications:

Engineering Advantages

• High-Attenuation Noise Suppression: Passive resistor-capacitor (RC) networks line each input channel path to eliminate electromagnetic interference (EMI) and high-frequency line noise. This design cleans up signals from long field cable runs, preventing contact chatter or false state changes inside the master controller.

• Dual Loop Excitation Support: The internal trace configuration accommodates both low-voltage 24 V DC and high-voltage 125 V DC field excitation power lines. This flexibility allows plant engineers to adjust contact loop wetting currents to match specific field switches, burning through oxide layers on older field contacts effortlessly.

• Rigid Barrier-Style Screw Blocks: Heavy-duty physical barrier strips separate each screw terminal point. This mechanical layout prevents loose wire strands from shifting over to touch adjacent input paths, neutralizing the risk of accidental short-circuits during routine control panel maintenance.

• Full Thermal and Chemical Shielding: A factory-applied conformal coating completely seals the delicate copper traces against harsh environmental elements. This insulation layer resists conductive dust, moisture tracking, and salt-air corrosion in heavy industrial plant environments.

FAQs

• What specific upgrade advantages does the 'S2CCD' version offer over earlier TBCI variations?

  The "S2CCD" revision introduces a refined circuit layout with enhanced surge withstand capabilities and low-loss component baselines. It maintains complete backward physical footprint and software compatibility, dropping directly into standard Mark VI termination cabinets without altering your existing structural wiring.

• Q1: Can I test individual contact input loops without unseating the main ribbon cables?

  A1: Yes. The board layout provides exposed diagnostic test points along each input channel track. Technicians can measure loop voltages and excitation parameters directly with a standard digital multimeter, reducing diagnostic time during active plant operations.

• Q2: Does this termination board support hot-swapping procedures for the driving VME cards?

  A2: While the terminal board remains connected to field wiring indefinitely, you must turn off rack power before disconnecting the internal logic ribbon cables. Removing active VME data links while powered can corrupt the parallel bus communications and trigger an immediate turbine trip.

• Q3: How does the system respond if an entire excitation voltage loop drops out on this board?

  A3: The connected VME I/O board monitors excitation continuity from the IS200TBCIS2CCD constantly. If a field power line drops, the monitoring logic detects the voltage dip instantly and flags a diagnostic alarm inside the ControlST interface to indicate an excitation loss fault.