Product Overview

The IS200TBCIH2BBC is a Mark VIe contact input terminal board used to bring discrete field contact signals into GE control and protection architectures. It provides a structured termination and isolation interface between field wiring and one or more PDIA discrete input I/O packs, supporting reliable dry-contact monitoring in turbine, balance-of-plant, and general industrial control cabinets.

The board is designed for 24 VDC contact excitation and includes input conditioning to improve noise immunity in electrically harsh environments. Group isolation is implemented with optical isolation to reduce the transfer of transients and ground-related disturbances from the field side into the control electronics. The IS200TBCIH2BBC supports installation in simplex, dual, or TMR arrangements by connecting to the appropriate number of PDIA packs for the system design.

Electrical and Interface Specifications

Additional technical notes

• Each channel provides a dedicated field terminal pair for contact sense and return to simplify commissioning and troubleshooting

• Higher input current on select channels may be used to better support remote solid-state devices and long cable runs, depending on site design practices

Typical Industrial Applications

• Monitoring auxiliary contacts, permissives, interlocks, and status points in turbine control systems

• Discrete input termination for plant DCS cabinets using Mark VIe I/O packs

• Simplex, dual-redundant, or TMR discrete input architectures where PDIA packs are used

• Retrofit and lifecycle maintenance projects requiring like-for-like terminal board replacement and preserved wiring conventions

• Noise-prone installations where optical isolation and hardware input filtering improve contact signal integrity