Product Overview

The General Electric IS200TDBTH6A is a discrete input/output terminal board. It belongs to the Mark VIe series for distributed control systems. You can mount this board on a flat surface or DIN rail. The IS200TDBTH6A provides 24 group-isolated contact inputs. It also offers 12 form-C relay outputs for increased functionality. An option card can further expand relay capabilities. Industrial users trust this board for turbine and generator control applications.

Technical Specifications

The IS200TDBTH6A delivers robust I/O functionality in harsh environments. Below are the core technical details.

General Specifications:

• Part Number: IS200TDBTH6A.

• Manufacturer: General Electric.

• Series: Mark VIe / Mark VI Speedtronic.

• Functional Acronym: TDBT.

• Country of Origin: United States (Salem, Virginia).

• Manual: GEH-6721L.

I/O Specifications:

• Number of Input Channels: 24 isolated contact inputs.

• Number of Relay Channels: 12 form-C relay outputs.

• Input Current: 24 V dc nominal (also supports 48V and 125V).

• AC Voltage Rejection: 12 V RMS.

• Input Filter: Hardware filter for noise suppression.

Power Requirements:

• Main Power: +5 V dc.

• External Wetting Voltage: 24, 48, or 125 V dc from external source.

Physical Specifications:

• Width: 17.8 cm.

• Height: 33.02 cm.

• Operating Temperature: -30 to +65°C.

• Technology: Surface mount components.

• PCB Coating: Conformal coating.

• Base Mounting: DIN rail.

• Assembly Type: Normal Assembly.

• Grouping: Group 6.

• Functional Revision: 1A.

Wetting Voltage Ranges

The IS200TDBTH6A supports three distinct wetting voltage ranges.

Input Wetting Voltage Ranges:

• 24V Nominal: 16 to 32 V dc.

• 48V Nominal: 32 to 64 V dc.

• 125V Nominal: 100 to 145 V dc.

Note: The wetting voltage is half of the threshold voltage. Therefore, proper voltage selection is critical for reliable operation.

Input Current and Protection

The IS200TDBTH6A includes current limiting and noise suppression features.

Contact Input Currents:

• First 21 circuits: Resistance limited to 2.5 mA.

• Circuits 22 through 24: Resistance limited to 10 mA.

Protection Features:

• Noise suppression guards against surges.

• Protection against high-frequency noise is included.

• Resettable polymer positive temperature coefficient fuses limit current.

• The 24V dc supply is limited to 0.5 A.

Relay Outputs

The IS200TDBTH6A offers 12 form-C relay outputs for field control.

Relay Configuration:

• Number of Relays: 12 form-C (changeover) contacts.

• Terminal Block: TB1 (upper set of terminals).

• Option Card Support: Plug into JW1 and JW2 connections.

Option Card Information:

• When an option board is used, it plugs into JW1 and JW2.

• The connectors secure the option board in place.

• External power can be wired to the option board connector.

Terminal Blocks and Wiring

The IS200TDBTH6A uses two sets of terminal blocks for field wiring.

Terminal Block Configuration:

• Lower Set (TB2): Input contact circuits.

• Upper Set (TB1): Relay section connections.

Wiring Recommendations:

• Use #18 AWG wires for direct connections.

• Reference SRLY relay board screw assignments for relays.

• Reference STCI contact input board screw assignments for inputs.

• A separate bracket should end shields.

PDIO I/O Pack Compatibility

The IS200TDBTH6A works with PDIO I/O packs for network communication.

Connection Points:

• JR1: Networks to R controller.

• JS1: Networks to S controller.

• JT1: Networks to both R and S controllers (two-controller setup).

Important Note:
Each PDIO connected to a TMR controller receives a single network connection. A single PDIO I/O pack cannot properly operate the IS200TDBTH6A. Therefore, three I/O packs connect via D-type connectors and communicate through Ethernet.

Installation Guidelines

Mount the IS200TDBTH6A on a DIN rail using the sheet metal carrier. Alternatively, attach it to a sheet metal assembly inside a cabinet. Install a plastic insulator between the board and the carrier. Connect input circuits to the lower terminal block (TB2). Connect relay circuits to the upper terminal block (TB1). Use #18 AWG wires for all field connections. Provide external wetting voltage from a 24V, 48V, or 125V DC source. Ensure the operating temperature stays between -30 and +65°C. The conformal coating protects the board from moisture and contaminants.

Configuration Information

The IS200TDBTH6A has no hardware configurations or jumpers on the main board. However, six jumpers are present on the option board (WROBH1). These jumpers turn relays on or off. All six jumpers are assembled during manufacturing. Remove a jumper when a relay will have dry contacts and power distribution is not needed.

Board Components

The IS200TDBTH6A features several visible components on its surface.

Prominent Components:

• Twelve large black potentiometers (variable resistors).

• Arranged in three horizontal rows of four components each.

• One long grey rectangular component.

• Several rows of very small components.

• Two long rows of round red MOVs (metal oxide varistors) on the left side.

• One small white connector with three ports.

• Several small integrated circuits.

• One small yellow capacitor.

• Two small yellow resistors with one black stripe in the middle.

Environmental and Protection Features

The IS200TDBTH6A includes a conformal PCB coating. This coating is a thin layer of chemically-applied protection. It covers the entire base PCB. Consequently, the board resists moisture, dust, and chemical exposure.

What is in the Box

Please inspect all items upon delivery.

• General Electric IS200TDBTH6A discrete I/O terminal board.

• Anti-static protective bag.

• Sheet metal carrier with plastic insulator.

• DIN rail mounting hardware.

Frequently Asked Questions (FAQ)

1. Was the IS200TDBTH6A manufactured domestically by GE?
Yes. The IS200TDBTH6A was domestically manufactured at General Electric’s Salem, Virginia factory location.

2. What type of PCB coating does this board have?
The IS200TDBTH6A features a conformal PCB coating. This is a thin layer of chemically-applied coating that protects the entire base PCB.

3. Can I use a single PDIO I/O pack with this board?
No. A single PDIO I/O pack cannot properly operate the IS200TDBTH6A. Three I/O packs are required for TMR configuration.

4. What is the function of the 12 potentiometers on this board?
The twelve large black potentiometers are variable resistors. They allow fine adjustment of input and output parameters on the IS200TDBTH6A.

5. Does this board have any user-configurable jumpers?
No. The IS200TDBTH6A itself has no hardware configurations or jumpers. Only the optional relay board (WROBH1) contains six jumpers for relay control.