The GE IS230TDBTH6A(IS200TDBTH6ABC) is a powerful Discrete Input/Output Terminal Board in the Mark VI series, designed for TMR  systems with DIN-rail or flat mounting. It accepts 24 group-isolated contact inputs (nominal 125V DC) and features 12 Form-C relays, expandable via an optional WROBH1 board. Equipped with 49 metal oxide varistors (MOVs) and input filters, it suppresses surges and high-frequency noise, ensuring signal integrity in harsh industrial environments.

Compatible with Mark VI systems, it connects to three PDIO I/O packs via D-type connectors, communicating with controllers over Ethernet each pack linked to R, S, or dual controllers. Installation involves mounting on a sheet metal carrier with 12-24 AWG wiring to two 48-terminal blocks (TB1 for relays, TB2 for inputs). It lacks hardware jumpers, while the WROBH1 option uses 6 jumpers to control relay power.

Key Features
Input/Output Capacity: 24 group-isolated contact inputs (125V DC) and 12 Form-C relays, with optional expansion via WROBH1.

Robust Protection: 49 MOVs and input filters guard against surges and noise, critical for industrial reliability.

TMR Compatibility: Integrates with three PDIO packs for Ethernet-based communication with TMR controllers, ensuring redundancy.

Flexible Mounting: DIN-rail or cabinet-mountable via sheet metal carrier, with pluggable Euro-style terminal blocks (TB1/TB2) for organized wiring.

Simplified Configuration: No hardware jumpers; optional WROBH1 board uses 6 jumpers to enable/disable relay power, adapting to dry contact needs.

Diagnostics: Monitors relay contacts and fuse status with WROBH, providing feedback to PDIO packs for efficient troubleshooting.