What the DS200RTBAG2AHC Does in a Speedtronic Installation

GE's RTBA family — the four-letter acronym stands for relay terminal board in the company's DS200 nomenclature — gives a Mark V-era drive or exciter a bank of ten additional relay outputs. This listing is for a clean, tested DS200RTBAG2AHC, the Group 2 build at the AHC revision level, sold under its catalog description of relay card module. It is an optional board: not every installation includes one, and when fitted it mounts in the drive or exciter cabinet rather than inside the Mark V control panel. That distinction matters when you are tracing a fault, because an output problem annunciated at the panel can originate in either location.

The ten relays occupy positions K20 through K29 — seven DPDT types followed by three 4PDT types. Each position carries an LED that lights when its relay can be energized, each relay plugs into the board and can be replaced on its own, and field wiring terminates on screws along the board edge. A 16-pin RPL connector and a 2-pin OPTPL connector link the RTBA's I/O to the companion LTBA board, and the relays can be driven straight from the system's pilot relays or operated remotely. GE's instruction manual for this hardware is GEI-100167.

Troubleshooting First: Relay, Ribbon, or Wiring?

Because so much of the RTBA is serviceable in place, a methodical half hour often saves a board swap:

• Single dead output, LED on: the plug-in relay in that position is the prime suspect. Swap it with a known-good relay from a non-critical position and see whether the fault follows the relay.
• Single dead output, LED off: the command is not reaching the relay. Inspect the RPL connection to the LTBA board and the upstream pilot-relay path before blaming the RTBA.
• Several outputs dead in a block: think power routing and jumpers — the board's Berg-type jumpers include a documented power-source selector for the K20–K22 relay group. Compare every jumper against the outgoing board or the drawings before concluding the card has failed.
• Intermittent or chattering loads: check screw-terminal torque and the condition of the field wiring first; vibration-loosened lugs are a classic RTBA impostor.

Reading the Part Number: G2, A, H, C

Break DS200RTBAG2AHC into its parts and the board identifies itself. DS200 marks the Mark V-era board family. RTBA is the function. G2 is the configuration group — GE produced the RTBA in several groups, and they are distinct builds, not interchangeable labels. The final letters record revisions: functional revisions A and H plus artwork revision C, per the convention DS200 boards follow. When ordering, quote all of it. Two boards that share the RTBA acronym but differ in group or revision may not drop into the same slot identically. The full format is covered in our GE Speedtronic Part Number Decoder.

Companion Hardware and Upgrade Path

The board the RTBA talks to most is the LTBA, reached through the RPL connector — if you are replacing one, confirm the health of the other and of the cable between them. Both belong to the DS200 generation profiled in GE Mark V DS200 Boards Explained. You can browse the full GE Mark V DS200 Boards collection or the wider GE Speedtronic Turbine Control Boards range for neighboring cards. If your site is weighing an upgrade instead of a like-for-like replacement, the IS200-prefixed Mark VI generation is a different hardware platform — see Mark V vs Mark VI: DS200 to IS200 before committing either way.

Details That Speed Up Your Quote

To match this used, tested board to your requirement on the first pass, include in your request:

• Full part number with suffix (DS200RTBAG2AHC) and any additional revision markings from the label.
• A label photo — it resolves group and revision questions instantly.
• Turbine or drive model, plus whether your Mark V is Simplex or TMR.
• Whether the application is a running failure or a planned spare, and your required delivery timeframe.
• Quantity, destination country, and any purchase-order paperwork requirements.

Get a Quote Within 24 Hours

This DS200RTBAG2AHC has been cleaned and tested and ships with the one-year warranty stated below. Use the Request a Quote button and we will come back to you within 24 hours. Worldwide DDP delivery, purchase orders accepted.