Product Overview

The GE IS210DRTDH1A / IS200DRTDH1A is a Mark VI Compact RTD Terminal Board used for temperature-sensing connections within GE turbine control systems. The board forms part of the field-interface layer, where resistance temperature detector (RTD) signals from turbine equipment are brought into the Mark VI control architecture for monitoring and control.

RTDs are commonly installed at points where temperature information is important to turbine operation, such as bearings, mechanical equipment, or other monitored locations. The terminal board provides an organized connection point between these field temperature sensors and the associated Mark VI I/O and control hardware.

The IS210DRTDH1A / IS200DRTDH1A is particularly relevant to maintenance and replacement work on existing GE Mark VI installations. During service, the technician needs to preserve the correct sensor-to-channel assignments and verify the associated wiring before returning the temperature monitoring system to operation.

Technical Specifications

Product Features

• Compact RTD terminal board for GE Mark VI turbine control systems.
• Provides an organized interface for RTD temperature sensor wiring.
• Connects field temperature measurements with associated Mark VI I/O hardware.
• Supports temperature monitoring within turbine control and protection applications.
• Keeps field sensor connections organized within the control-system wiring architecture.
• Suitable for maintenance and replacement of existing Mark VI RTD interface hardware.
• Supports troubleshooting of temperature-sensing circuits from the field device to the control system.
• Works as part of the Mark VI I/O and terminal-board architecture rather than as an independent controller.
• Applicable to turbine equipment where temperature measurements are used for monitoring or control.
• Supports structured sensor-to-channel identification during commissioning and maintenance.

Working Principle

The IS210DRTDH1A / IS200DRTDH1A provides the termination point for RTD temperature-sensing circuits within the Mark VI system. An RTD changes its electrical resistance in response to temperature. The field wiring carries this sensor information from the measurement point to the terminal board.

The terminal board organizes the sensor connections and routes the corresponding circuits toward the associated Mark VI I/O hardware. The electronic I/O system then acquires the RTD information so that the Mark VI control system can use the temperature data for monitoring, alarms, control functions, or equipment protection according to the configured application.

A typical signal path can be represented as:

RTD Sensor → Field Wiring → IS210DRTDH1A / IS200DRTDH1A → Mark VI I/O Hardware → Mark VI Control System → Temperature Monitoring / Control Functions

The terminal board itself is primarily an interface and termination component. It does not independently determine the process temperature or execute turbine control logic.

If a temperature channel shows an abnormal value, troubleshooting should follow the complete signal path. The RTD sensor, field wiring, terminal connections, associated I/O hardware, and control-system configuration can each affect the resulting temperature indication.

Role in a GE Mark VI Temperature Monitoring Architecture

The IS210DRTDH1A / IS200DRTDH1A occupies the field termination layer of the Mark VI temperature measurement architecture. It connects RTD field circuits with the electronic I/O hardware responsible for acquiring the temperature information.

Industrial Applications

Installation and Maintenance

1. Verify the board identification — Confirm the IS210DRTDH1A / IS200DRTDH1A designation against the existing Mark VI documentation and replacement requirement.
2. Review the temperature-monitoring documentation — Check wiring diagrams, terminal assignments, I/O channel information, and applicable turbine instrumentation documentation.
3. Isolate the relevant equipment — Follow the approved plant procedure to place the affected control and temperature-monitoring circuits in a safe maintenance condition.
4. Identify RTD connections — Label or document each sensor connection before disconnecting the existing terminal board to preserve the correct sensor-to-channel assignment.
5. Inspect the replacement board — Check the board, terminals, connectors, mounting features, and accessible surfaces for physical damage or contamination.
6. Inspect field wiring — Check RTD conductors for loose connections, damaged insulation, corrosion, or other conditions that could affect the temperature signal.
7. Remove the existing board carefully — Use appropriate ESD precautions and avoid unnecessary mechanical force on terminals, connectors, or mounting hardware.
8. Install the replacement board — Position the IS210DRTDH1A / IS200DRTDH1A correctly within the Mark VI terminal arrangement and secure it according to the system configuration.
9. Reconnect RTD circuits — Restore each sensor connection to its documented terminal position and verify that conductors are securely terminated.
10. Verify channel assignments — Check the sensor-to-I/O channel mapping and associated Mark VI configuration before returning the temperature-monitoring system to normal operation.
11. Perform a controlled signal check — Restore the affected circuit and verify that the temperature channels show plausible readings without unexpected alarms or signal faults.
12. Document the maintenance activity — Record the board designation, terminal assignments, sensor connections, test results, and any changes made during the service operation.

Related Components

Recommended Related Models

Key Advantages

• Provides an organized RTD interface within the GE Mark VI architecture.
• Supports temperature-sensor connections for turbine monitoring applications.
• Maintains structured sensor-to-I/O channel wiring.
• Separates field sensor termination from electronic I/O processing.
• Supports troubleshooting from the RTD sensor through the Mark VI I/O system.
• Suitable for maintenance and replacement of established Mark VI temperature-monitoring installations.

Technical FAQs

What is the function of the GE IS210DRTDH1A / IS200DRTDH1A?

The board provides a terminal interface for RTD temperature-sensing circuits within a GE Mark VI system. It connects field RTD wiring with the associated Mark VI I/O architecture used to acquire and monitor temperature information.

Does the terminal board measure temperature by itself?

No. The RTD sensor is the temperature-sensing element. The terminal board provides the physical electrical connection, while the associated Mark VI I/O hardware acquires the RTD signal and the control system uses the resulting measurement.

What should be checked when replacing this RTD terminal board?

The board designation, terminal assignments, RTD sensor wiring, associated I/O channels, and Mark VI configuration should be verified. Correct sensor-to-channel mapping is especially important because an incorrect connection can associate a temperature reading with the wrong monitored point.

What can cause an abnormal RTD temperature reading?

Possible causes include a damaged RTD sensor, open or poor field wiring, incorrect terminal connections, problems in the associated I/O hardware, or an incorrect system configuration. Troubleshooting should therefore check the complete sensor circuit rather than the terminal board alone.