IS200TDBTH6ACD 24-Channel GE TDBT Module

Core Specifications: GE IS200TDBTH6ACD

• Brand & Model: General Electric IS200TDBTH6ACD — authentic Mark VIe series TDBT board.
• Product Type: Discrete Input/Output Terminal Board (TDBT) for Distributed Control Systems.
• Country of Origin: United States (Salem, VA facility).
• Input Channels: 24 group-isolated contact inputs.
• Wetting Voltage: Accepts external 24, 48, or 125 V DC. Ranges: 16–32V, 32–64V, and 100–145V DC.
• Relay Outputs: 12 form-C relay channels. Supports optional relay expansion board.
• Power Requirement: +5 V DC for onboard logic.
• Noise Rejection: Hardware filter with 12V RMS AC rejection. Suppresses surges and high-frequency noise.
• Operating Temperature: -30°C to +65°C.
• Dimensions: 17.8 cm W x 33.02 cm H. Surface mount technology.

Functional Architecture & Communication

• PDIO Integration: The IS200TDBTH6ACD connects to three PDIO I/O packs via D-type connectors (JR1, JS1, JT1).
• Redundant Control: JR1 links to R controller, JS1 to S controller, JT1 supports dual R/S configurations.
• TMR Compatibility: Each PDIO receives a single network connection to its corresponding TMR controller.
• Critical Rule: A single PDIO I/O pack cannot operate the TDBT board. You must use three packs for proper function.
• Ethernet Communication: I/O packs communicate directly with controllers via Ethernet.

Installation & Mechanical Mounting

• Mounting Options: DIN rail mount (standard) or panel mount via sheet metal carrier.
• Insulation: Includes a plastic insulator between the board and carrier.
• Wiring Gauge: Use #18 AWG wires for all field connections.
• Terminal Blocks: Two sets of 48 terminals. TB1 (upper) handles relay outputs. TB2 (lower) handles contact inputs.
• Shielding: Use a separate bracket to terminate cable shields.
• What’s Included: 1x GE IS200TDBTH6ACD board. DIN rail clip and insulator pre-assembled.

Relay Outputs & Option Board Configuration

• Option Slot: Board accepts relay option card via connectors JW1 and JW2. Friction fit secures the card.
• WROBH1 Jumpers: Six jumpers control relay wetting/dry status. Factory-installed; remove jumper for dry contact operation.
• External Power: Wire external power directly to the option board connector if relays require non-board power.
• TB1 Mapping: Terminal designations change based on option board presence. Refer to GEH-6721L manual for exact pinout.

Input Circuit Behavior & Protection

• Current Limiting: Channels 1–21 limit input current to 2.5 mA. Channels 22–24 limit to 10 mA.
• Overcurrent Protection: Resettable polymer PTC fuses limit the 24V DC supply to 0.5 A. No fuse replacement needed.
• Threshold Logic: Wetting voltage equals half of the threshold voltage. Onboard signal conditioning mirrors STCI terminal board performance.
• No Jumpers: The base IS200TDBTH6ACD board contains zero hardware jumpers or DIP switches.

PCB Hardware Identification Guide

• Visible Components: 12 large black potentiometers (3 rows of 4), long grey rectangular component, red MOVs (metal oxide varistors) in dual rows.
• Passive Components: Small yellow capacitor, two yellow resistors with single black stripe, multiple integrated circuits.
• Connector: Small white 3-port connector on board edge.
• Coating: Full conformal coating — chemically applied thin layer protects against moisture and debris.
• Revision: Functional revision 1A. Group 6 Mark VIe product family.

Shipping & Repair Logistics

• Availability: In stock. Ships within 24 hours.
• Carriers: FedEx, UPS, DHL.
• Repair Service: 3–7 day standard turnaround.
• Packaging: Anti-static shielding, foam-lined box.
• Manual Reference: GEH-6721L (available separately).

Frequently Asked Questions (FAQ)

1. Was the IS200TDBTH6ACD really made in the USA?

Yes. GE manufactured this TDBT board at their Salem, Virginia plant. It is 100% domestically produced.

2. What does the conformal coating actually cover?

The coating covers the entire PCB surface. It is a thin chemically applied layer. It protects traces and components from conductive dust, vibration, and humidity.

3. Can I use this board with only one PDIO I/O pack?

No. The IS200TDBTH6ACD requires three I/O packs. One pack alone cannot drive the board correctly. You need connections to JR1, JS1, and JT1 for TMR operation.

4. How do I select 24V vs 125V wetting?

The board auto-ranges based on the external voltage you apply. No jumper changes needed. Just supply 24, 48, or 125V DC at the input terminals.

5. What is the advantage of the 12 black potentiometers?

These are variable resistors. Technicians use them for fine-tuning signal thresholds during commissioning. They are not user-adjustable in normal operation.

6. Buying advice: Should I choose the H6ACD revision?

Yes. The IS200TDBTH6ACD includes conformal coating and the latest component layout. It is fully backward compatible with earlier TDBT boards but offers better surge protection. Always choose the H6A variant for new installations.