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IS230TNDTH6A - Discrete Input Terminal Board is available in stock which ships the same day.
IS230TNDTH6A - Discrete Input Terminal Board comes in UNUSED as well as REBUILT condition.
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SPECIFICATIONS:
Part Number: IS230TNDTH6A
Manufacturer: General Electric
Series: Mark VIe
Board Type: Discrete Input Terminal Board (TNDT)
Input Channels: 24 Discrete Contact Inputs
Output Channels: 4 Solenoid Driver Outputs
Wetting Voltage: 24 VDC (Isolated from Control Power)
Input Threshold: 12 VDC (Nominal)
Output Rating: 2.0 A per channel (24 VDC)
Isolation: 1500 Vrms (Field-to-Logic)
Communication Interface: Double-connector for IS220PDIA I/O Packs
Mounting: DIN-rail or Bolt-on options
Operating Temp: -30 °C to +65 °C (-22 °F to +149 °F)
Dimensions: 15.8 cm (H) x 10.2 cm (W)
Availability: In Stock
Origin: United States
FUNCTIONAL DESCRIPTION:
The IS230TNDTH6A is a Discrete Input Terminal Board designed and manufactured for the General Electric (GE) Mark VIe control system. It functions as the primary physical interface between field-level digital devices and the digital control logic. By consolidating 24 discrete inputs and 4 solenoid driver outputs into a compact, ruggedized footprint, the TNDT H6A provides a cost-effective solution for auxiliary turbine sequencing, balance-of-plant (BOP) control, and general-purpose I/O expansion.
PRECISION DISCRETE INPUT MANAGEMENT
The TNDTH6A manages 24 dry contact inputs by providing a regulated 24 VDC wetting voltage. This voltage is distributed to the field contacts and monitored for state changes (Open/Closed). The circuitry is designed with high-impedance sensing to ensure that even with significant cable runs, signal attenuation does not lead to false triggers. Each channel is equipped with a passive RC filter network to suppress electromagnetic interference (EMI) and high-frequency noise common in high-voltage switchgear environments.
INTEGRATED SOLENOID DRIVER OUTPUTS
Unique to the TNDTH6A architecture is the inclusion of 4 solenoid driver outputs. These outputs are designed to provide a direct 24 VDC source to drive low-power solenoid valves or interposing relays. Each output feature:
MODULAR REDUNDANCY AND IONET INTERFACE
The Discrete Input Terminal Board is built to host IS220PDIA I/O packs. The board features dual connectors to support both Simplex and Dual Redundant configurations. In a dual setup, two I/O packs are mounted to the board, each communicating back to the central controllers over independent IONet paths. This ensures that even if one I/O pack or network cable fails, the process data for all 28 points remains available to the turbine control logic without interruption.
WHY BUY FROM WOC:
World of Controls is a global leader in providing mission-critical GE Speedtronic hardware. Every Discrete Input Terminal Board undergoes a rigorous quality assurance protocol, including multi-point continuity testing, insulation resistance checks, and live-load verification of the solenoid outputs. Whether you require an UNUSED unit for a new project or a REBUILT board for emergency repair, WOC ensures your hardware is calibrated and ready for immediate deployment. With 24/7 technical support and expedited global shipping, we are your strategic partner in minimizing industrial downtime.
What is the GE IS230TNDTH6A?
The IS230TNDTH6A is a Discrete Input Terminal Board (TNDT) used in the Mark VIe system. It facilitates the landing of 24 discrete inputs and provides 4 solenoid driver outputs, specifically designed for 24 VDC nominal wetting voltage applications.
What is the specific application for the H6A version of the TNDT board?
The H6A version is specifically designed for 24 VDC discrete logic. It is most commonly used for auxiliary systems where 24V is the standard wetting voltage for switches and the required voltage for small solenoid control.
How does the board handle Wetting Voltage distribution?
The 24 VDC wetting voltage is typically sourced from the J-power distribution on the Mark VIe backplane. The TNDT board includes internal current-limiting resistors and fuses to ensure that a short circuit at a single field contact does not collapse the power for the remaining 23 channels.
What is the maximum current rating for the solenoid outputs?
The 4 solenoid outputs on the IS230TNDTH6A are typically rated for up to 2.0 Amperes per channel at 24 VDC, though it is recommended to stay within 80% of this rating for continuous industrial duty cycles.
