New Surplus TCQB for Turbine Analog I/O

The most common mistake made when replacing a Mark V extended analog board has nothing to do with the board itself — it is the firmware left behind on the old card. This listing, a new surplus DS200TCQBG1BCB in original factory packaging, is the hardware half of that equation: GE's RST Extended Analog I/O card for location 3 of the Speedtronic Mark V control cores, partner to the primary TCQA analog card. On panels equipped for it, the TCQB handles proximitor, LVDT/LVDR, and LM vibration inputs plus two regulator milliamp outputs — one card in <R> for Simplex, three across <R>, <S>, and <T> for TMR.

The EPROM Question Every Buyer Should Ask

Ask it before the board ships, not during the outage: where is my firmware coming from? The TCQB's programmable logic runs from socketed EPROM modules, and those modules carry your unit's application code. Replacement hardware does not include them. Two paths:

• Transfer. Move the modules from the outgoing board. GE's guidance is specific: wrist strap on, pry each module free with a flat blade without contacting neighboring components, into a static-protective bag, then press it onto the new board's socket until no gap remains.
• PROM set. Where modules are damaged, corroded, or missing, a DS200TCQBF1-series PROM set at the correct firmware revision replaces them — we stock these as well and can quote board and firmware together. PROM set numbers carry their own trailing revision letters, and on firmware those letters define the content, so quote them exactly.

Skip this planning and a perfectly good replacement board boots into configuration errors — a self-inflicted failure that shows up repeatedly in Mark V field forums.

Verifying the Fault Before Replacement

New surplus stock deserves to fix a real failure. Quick triage, in field-proven order: compare the suspect channel across cores on TMR panels (a unanimous wrong answer means sensor or wiring, not three bad cards); walk the field loop from probe to termination; check the card's side-visible OK LED and, if dark, the seating and TCPS power ribbons inside the core — a published field case ended weeks of core reboots with a TCPS replacement after the analog cards were cleared; audit the sensor-type jumpers on inputs PRX01–PRX03 if any transducer work preceded the symptoms; and reseat aging EPROMs before condemning the card they sit on.

DS200TCQBG1BCB Nomenclature Explained

DS200TCQBG1BCB = DS200 (GE board series) + TCQB (extended analog I/O function) + G1 (Group 1) + B (base functional revision) + CB (subsequent revision letters — conventionally a later functional revision C and artwork revision B). Match G1B against your label; do not substitute the G1A or G2A builds without engineering confirmation, never treat a G-group number as an H-group number, and treat every trailing letter as significant when quoting. Our GE Speedtronic Part Number Decoder covers the scheme end to end.

Boards Commonly Ordered Alongside

Orders for this card frequently bundle: the TCQA primary analog card it extends, the TCQC analog expander, a spare TCPS core power supply (the quiet troublemaker behind many "analog" faults), and a matching PROM set. Browse the GE Mark V DS200 Boards collection or the full GE Speedtronic Turbine Control Boards catalog; GE Mark V DS200 Boards Explained explains who does what, and Mark V vs Mark VI: DS200 to IS200 maps the platform's successor.

From RFQ to Delivery

Send a Request a Quote carrying: the exact part number DS200TCQBG1BCB from your label (photo preferred), Simplex or TMR configuration, turbine type, your firmware plan (EPROM transfer or PROM set), quantity, urgency, and destination. Quotes return within 24 hours. The board is new surplus, factory packaged, warranted per the table below; shipment is DDP worldwide and purchase orders are welcome.

General Information about the Product
Part Number	DS200TCQBG1B Mark V DS200
Description	GE DS200TCQBG1B DS200TCQBG1BCB RST Extended Analog I/O Board Mark V NEW
Condition	newSurplusFactoryPackage Original Factory Packaged. With 1 Year Warranty.