DS200RTBAG3AGC GE EX2000 Relay Terminal Board | Mark V Module

Technical Architecture & Functional Scope

The DS200RTBAG3AGC is a high-density Relay Terminal Board (RTBA) engineered for the GE EX2000 and Mark V control environments. Serving as a supplemental I/O interface, this board expands cabinet capability by providing ten discrete relay points. It facilitates remote control operations via LAN I/O interaction or direct user command, ensuring robust switching logic for industrial exciters and turbine drives.

Configuration & Relay Specifications

• Brand: General Electric (GE)
• Model: DS200RTBAG3AGC
• Series: EX2000 / Mark V
• Relay Bank 1 (K20-K26): 7 x DPDT (2 Form C contacts each, 10A rating)
• Relay Bank 2 (K27-K29): 3 x 4PDT (4 Form C contacts each, 1A rating)
• Coil Voltage: 110 VDC
• Protection: 130 VAC Metal Oxide Varistor (MOV) per I/O channel

Installation & Field Maintenance

• Cable Management: Use provided connector levers for CP-series plugs; avoid pulling ribbon cables by their harness to prevent internal wire breakage.
• Relay Swap: The modular design allows hot-swappable replacement (post-power isolation). Depress the retaining clip top to disengage the relay housing.
• Wire Termination: When replacing the entire board, verify all terminal screws are torqued to ensure consistent contact resistance across the 10-point array.
• Configurable Settings: Always verify that jumper positions on the replacement board mirror the legacy unit to prevent logic errors in the exciter control sequence.

Global PLC Spare HUB's Insight

The DS200RTBAG3AGC is the backbone of secondary switching in legacy turbine cabinets. Our engineering team notes that this board is particularly sensitive to voltage transients; the onboard MOVs are the first line of defense. If you notice localized clicking or irregular contact closure, it is often a sign that the MOV has reached its suppression cycle limit and the entire board requires a health assessment.

Professional FAQ

Q: Can I interchange DPDT and 4PDT relays on this board?
A: No. The socket pin-outs are physically indexed to match specific relay types; forced installation will damage the PCB trace or relay base.

Q: How does the LAN I/O Terminal Board interface with these relays?
A: The LAN board issues command signals to the RTBA pilot relays, which then actuate the high-current DPDT/4PDT contacts for external device control.

Q: Is the 130 VAC MOV protection sufficient for all inductive loads?
A: It provides excellent suppression for standard pilot duty; however, for highly inductive DC solenoids, we recommend external arc suppression diodes.

Q: What should I prioritize during the selection/replacement process?
A: Prioritize the hardware revision level and ensure the system voltage matches your cabinet requirements (240-700V range) to avoid potential coil burnout.

Q: Are the CPH/CPN terminals polarity-sensitive?
A: Yes. CPH provides the positive (hot) control power, while CPN is the negative return. Incorrect polarity will result in a failure of the relay coil to energize.

Logistics & Quality Commitment

• Expedited Shipping: Secure processing and dispatch within 24-48 hours via FedEx, UPS, or DHL.
• Warranty Assurance: Every DS200RTBAG3AGC includes a 12-month comprehensive quality warranty.
• Reliability: Each card undergoes standardized testing to ensure relay contact integrity and MOV clamping performance.

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