GE DS200 Modules: DS200TBQAG1ABB Analog Terminal Board

Technical Dossier

Product Details And Specifications

GE DS200 Series Technical Notes

The Evolution of DS200 Architecture

The DS200 hardware lineage originates from GE's Mark IV simplex control platform of the early 1980s, which used discrete analog signal boards with limited self-diagnostics. The Mark V system, introduced in the late 1980s and widely deployed through the 1990s, standardized the DS200 module form factor — a VME-adjacent card format with a proprietary GE backplane connector. DS200 boards communicate over the IONET (I/O Network) serial bus and the ARCNET-based IONet topology used in Mark V R, S, and T controller triplex configurations.

By the mid-2000s, GE transitioned to the Mark VI platform (DS200 to IS200 module prefix), which retained physical compatibility in some rack positions but introduced Ethernet-based IONet and expanded diagnostics. The Mark VIe (IS420 prefix) followed, moving to a fully distributed I/O architecture. As of 2026, the DS200 series is in the mature-to-obsolete lifecycle phase. GE no longer manufactures most DS200 boards as new production; however, the installed base remains active at thousands of sites operating under long-term service agreements or independent maintenance contracts. Compatibility between DS200 and IS200 modules is board-specific and must be verified against the applicable Mark V/VI application software revision.

DS200 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly sourced DS200 series modules. Each entry reflects the board's primary functional role within the Mark V/VI control architecture.

Analog I/O & Terminal Boards

• DS200TBQAG1ABB: Analog terminal board; field-wiring termination for analog input/output signals in Mark V I/O racks.
• DS200TBCAG1AAB: Analog terminal board variant; thermocouple and RTD input termination with cold-junction compensation.
• DS200TBRAG1ABB: Analog terminal board for redundant analog I/O; used in triplex Mark V R/S/T racks.
• DS200DAOOG1AEB: Analog output board; 8-channel 4–20 mA current output for actuator and valve positioner control.
• DS200DAOAG1AEB: Analog output board variant; supports ±10 V voltage output in addition to current loop outputs.
• DS200ADIAG1A: Analog-to-digital input board; 16-channel differential analog input with 12-bit resolution.

Digital I/O Boards

• DS200DDIG1ADB: Digital input board; 24 VDC discrete input, 32-channel, for contact status monitoring and permissive logic.
• DS200DDOAG1AEB: Digital output board; 32-channel relay and transistor output for solenoid valve and alarm annunciator control.
• DS200TBDCG1ABB: Digital terminal board; field-wiring termination panel for discrete I/O boards in Mark V enclosures.
• DS200DTBCG1ABB: Digital terminal board with surge protection; for high-noise environments such as compressor stations.

CPU & Controller Boards

• DS200DCFBG1BEC: DC power filter board; conditions 28 VDC bus power for analog and CPU boards within the Mark V rack.
• DS200TCQAG1BHF: Turbine control I/O board; handles speed, temperature, and vibration signal processing for gas turbine protection.
• DS200TCDAG1AHF: Turbine control diagnostic board; provides self-test and watchdog functions for the Mark V R controller.
• DS200SDCIG1AFB: Speed and direction control interface; processes magnetic pickup and proximity probe signals for turbine speed control.

Communication & Network Adapters

• DS200CPCAG1ABB: Communication processor board; manages ARCNET IONet bus arbitration and data exchange between Mark V controller cards.
• DS200SLCCG3ADB: Serial link communication board; RS-232/RS-485 interface for HMI, historian, and SCADA connectivity.
• DS200EXPSG1ABA: Expansion power supply board; extends backplane power distribution to secondary I/O expansion racks.

Quality Control for the DS200 Range

DS200 boards present specific test challenges due to their proprietary backplane bus protocol, mixed analog/digital signal paths, and age-related component degradation including electrolytic capacitor ESR drift, EEPROM data retention issues, and ARCNET transceiver failure. DriveKNMS applies the following test protocol to all DS200 inventory:

• Visual inspection: PCB trace integrity, connector pin condition, component seating, and corrosion assessment per IPC-A-610 Class 2 criteria.
• Powered functional test: Each board is energized in a Mark V-compatible test rack. Analog boards are verified against calibrated signal sources across the full input range. Digital boards are tested for all channel switching states.
• Bus communication verification: ARCNET IONet participation is confirmed using a protocol analyzer. Boards that fail to arbitrate correctly are rejected.
• Burn-in: Boards are cycled through 48-hour thermal stress at operating temperature to screen for latent component failures.
• Calibration record: Analog output boards are calibrated and a calibration certificate is issued with each unit.