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TECHNICAL SPECIFICATIONS:
Part Number: IS200DTBAH2A
Manufacturer: General Electric (GE)
Series: Mark VI
Functional Acronym: DTBA
Product Type: Digital / Contact Input Terminal Board
Terminal Block Design: Fixed (non-removable) barrier screw blocks
Number of Input Channels: 48 discrete contact inputs
Terminal Block Quantity: 3 physical rows (16 points per row)
Supported Core Locations: Digital I/O Cores (Q11, Q21, Q51)
Interface Connectors: 2x multi-pin ribbon cable connectors (JQ1 / JR1)
Operating / Excitation Voltage: 24 V DC / 125 V DC nominal
Maximum Current Rating: 3.0 A continuous per terminal group
Ambient Operating Temperature: -30 �C to +65 �C
Storage Temperature Range: -40 �C to +85 �C
Humidity Parameters: 5% to 95% non-condensing RH
Repair / Evaluation Lead Time: 3-5 Business Days
AvailabilityIn Stock
Country of Origin: United States (USA)
Manual Reference: GEH-6153
The IS200DTBAH2A is a Digital Contact Input Terminal Board designed and manufactured by General Electric for its Speedtronic control migration frameworks. It serves as a specialized landing and conditioning stage for incoming discrete field contacts. In retrofitted or migrated turbine control architectures (such as transitioning from Mark V to Mark VIe platforms), this board receives wet or dry discrete switch inputs, such as pressure switches, limit indicators, and level sensors, and routes them safely to upstream processing hardware.
FIXED TERMINAL CONFIGURATION:
Unlike the H1A sub-variant, which utilizes pluggable, removable terminal blocks, the H2A variant features physical, fixed screw terminal barriers mounted directly to the PCB. This design ensures permanent, vibration-resistant gas-tight wire terminations that prevent accidental dislodgement in high-stress industrial environments. When replacing or modifying older legacy modules, field wiring is landed point-to-point onto these fixed screws.
SIGNAL ROUTING & COUPLING INTERFACE
The primary objective of the DTBA board is to capture multi-point external process contact signals and multiplex them via dedicated ribbon connectors (such as the JQ or JR ports) into adjacent digital processing boards like the TCDA or PMVD migration modules. This connection enables high-density digital signal conditioning without clustering thick, rigid field conductors near the central processor frame.
INTEGRATED CABLE BREAK DETECTION LOGIC
To guarantee a high layer of diagnostic visibility, the IS200DTBAH2A operates in tandem with current-sensing and digital feedback logic loops. The board features specialized trace networking that allows upstream digital processing modules to run broken-wire and open-ribbon cable checks. By analyzing small current differentials passed through the internal loops, the system instantly catches broken conductors or disconnected ribbon cables, dropping false alarms via the automated Diagnostic Alarm engine.
WHY PARTNER WITH WORLD OF CONTROLS
World of Controls specializes in supplying high-quality, warranty-backed OEM replacement parts, including unused surplus and professionally rebuilt components for critical turbine control and industrial automation systems like the General Electric Mark VI and Mark VIe platforms. To minimize customer downtime and ensure original equipment standard compliance, every component undergoes rigorous inspection, testing, and verification in an advanced electronics lab. Beyond parts distribution, the company delivers comprehensive, global support through 24/7 technical assistance, expert troubleshooting, component repair services, and rapid shipping, ensuring optimal efficiency and long-term reliability for critical industrial operations worldwide.
What is GE IS200DTBAH2A?
It is a Digital Contact Input Terminal Board manufactured by General Electric for Speedtronic Mark VI and Mark VIe control migration systems. It acts as an interface board to collect external discrete switch data from the field.
What hardware filtering does the board use to eliminate contact bounce?
Every discrete input path features an inline RC electronic filter network that removes high-frequency transient noise and mechanical contact bounce before signals reach the digital backplane.
How does the module detect a broken field wire versus an open switch?
It utilizes a continuous diagnostic bias current loop. If the current drops below a specific leakage threshold when a contact is open, the system triggers a wire-break alarm.
How does the DTBA interface with the main Mark VIe processors?
It terminates raw field inputs and routes them via JQ/JR ribbon cables to TCDA or PMVD migration modules, which process and convert the data for the high-speed IONet network.
What protects the low-voltage processing logic from field surges?
The board layout maintains strict creepage and clearance distances across the substrate, creating a galvanic isolation barrier that prevents 125 V DC field excitation surges from reaching the logic core.
What is the maximum contact-wetting voltage the board can handle?
The internal traces and surface-mount resistors are rated to distribute up to a 125 V DC nominal excitation field, allowing it to clear oxide buildup on older mechanical field switches.
