General Electric IS200TBCIS2C Mark VI Speedtronic Contact Input Termination Board

Description

The IS200TBCIS2C is a contact input termination board engineered for the Mark VI Speedtronic turbine control system assembly. This board is designed to interface field dry contact wiring with core system control cards, accepting 24 total dry contact inputs. The contact input voltage loop is powered by a floating power supply within the turbine control infrastructure. To prevent electrical disturbance, each dry contact channel is optically isolated and sampled at system frame rate for precise control action. The board facilitates signal fanning, distributing the input voltage status to three separate VME board racks via three dedicated interface connectors. It is built as a domestic hardware assembly featuring an S-style protective PCB coating, providing cross-system compatibility with VCCC and single-slot VCRC contact input cards.

Features

• Processes up to 24 discrete dry contact inputs powered via a floating supply.
• Optically isolated input loops protect core processor racks from field surges.
• Real-time contact status acquisition running synchronously at system frame rate.
• Fans out digital input indicators to three separate VME control racks concurrently.
• Outfitted with integrated noise suppression filters across six primary field contact paths.
• Protected by an S-style conformal PCB coating layer for insulation in harsh processing spaces.

Applications

• Gas and steam turbine discrete contact execution
• Sequential control logic and interlocking systems
• Generator control field trip and alarm routing
• Distributed automation loop diagnostics

Technical Specifications

Connections/Interfaces

Installation Guidelines

• Disconnect all electrical energy going into the target cabinet before placing or terminating the field interface device.
• Mount the board using the correct standoffs or DIN infrastructure matching the Mark VI enclosure layout.
• Wire the 24 field dry contact inputs using the standard terminal blocks, ensuring signal pairs align correctly with the floating power supply routing.
• Fasten the JR1, JS1, and JT1 ribbon interface cables between the board and the respective VCCC or VCRC cards, ensuring connector tabs lock securely.