GE DS200RTBAG2AFB

Key Technical Parameters

Advantages & Core Features

• Highest terminal capacity with fieldbus – The DS200RTBAG2AFB provides 80 terminals (5x 16-terminal blocks) and 2A per channel output capacity – the highest density and current of any RTBA board – combined with an integrated fieldbus interface. This is the ultimate remote I/O solution for high-density, high-current applications.

• Highest output current capacity (2A per channel) – Supports direct control of higher-power field devices (solenoid valves, contactors, small motors) without external interposing relays, reducing system cost and complexity.

• Integrated fieldbus with reduced wiring – The fieldbus interface reduces individual field wiring runs by enabling a single digital bus to multiple smart devices, significantly simplifying cabling in dense remote enclosures.

• Expanded diagnostic LED array – 28 LEDs provide granular status: 20 channel status LEDs, 5 block-level LEDs, “PWR OK”, “COAT OK” (coating integrity), “WARN” (pre-failure), “BUS ACT” (fieldbus active), “FB-ERR” (fieldbus error), and “FB-LINK” (fieldbus link).

• Fieldbus protocol flexibility – Supports Profibus DP, MODBUS RTU, or Foundation Fieldbus (field-configurable), ensuring compatibility with a wide range of smart field devices.

• Enhanced monitoring – Individual channel current sensing (up to 2A) and temperature monitoring enable proactive maintenance of conventional I/O and fieldbus devices.

• Individual channel fusing – Each conventional output channel is protected by a user-replaceable fuse (20 total) with LED indication.

• Galvanic isolation – 2,500 VAC isolation protects the Mark V backplane; fieldbus interface is also galvanically isolated.

• Compact 1-slot form factor – Occupies a single slot, maximizing rack space in remote junction boxes.

Key Differences vs. DS200RTBAG2A (Uncoated “G2A” Model)

Note: Conventional I/O specifications (80 terminals, 2A per channel, 20 fuses, individual channel current sensing) are identical.

Application Cases

• Largest offshore platform with high-density, high-current remote I/O – A North Sea mega-platform uses the DS200RTBAG2AFB to connect to smart actuators and pressure transmitters via Profibus DP, while providing 80 terminals for conventional I/O. The 2A outputs directly control solenoid valves without external relays. The BUS ACT LED confirms network health.

• Mega combined-cycle plant with Foundation Fieldbus – A 1,000 MW combined-cycle facility uses the DS200RTBAG2AFB with Foundation Fieldbus to connect to smart valve positioners and flow meters, reducing I/O wiring by 70% while supporting 80 terminals for conventional signals.

• Chemical plant with MODBUS RTU and high-current outputs – A petrochemical facility uses the DS200RTBAG2AFB to interface with MODBUS RTU devices (gas detectors, temperature transmitters) while providing 2A outputs for direct control of actuators. The FB-ERR LED immediately alerts operators to network faults.

• Large gas turbine with distributed smart instrumentation – A 500 MW combined-cycle plant uses the DS200RTBAG2AFB to connect to multiple smart transmitters and actuators via fieldbus, while terminating 80 conventional I/O points. The board eliminates the need for separate fieldbus and conventional remote I/O boards.

Comparison with Related Variants

Note: The DS200RTBAG2AFB has no conformal coating. The coated fieldbus variant is the DS200RTBAG1AFB (64 terminals, 1A per channel).

Selection Suggestions

1. Assess I/O density and current requirements – Select the DS200RTBAG2AFB if you need more than 64 terminals, more than 1A per channel, AND fieldbus communication. This is the only board that combines all three.

2. Confirm fieldbus protocol – Verify that your field devices support Profibus DP, MODBUS RTU, or Foundation Fieldbus. The board is field-configurable via DIP switches.

3. Assess wiring reduction opportunities – For installations with many distributed devices, the fieldbus interface can significantly reduce cabling.

4. Assess environmental conditions – The DS200RTBAG2AFB has no conformal coating. For harsh environments, you must choose between:

   • The DS200RTBAG1AFB (coated, 64 terminals, 1A per channel) – if that capacity and current is sufficient

   • The DS200RTBAG2AFB with external protective measures (sealed enclosures, field-applied conformal coating) – if the higher density and current are essential

5. Count your conventional I/O – The board supports up to 80 conventional terminals in addition to the fieldbus interface.

6. Verify fieldbus cable routing – Use proper shielded fieldbus cables. Route separately from power cables.

7. Procurement – The DS200RTBAG2AFB is among the rarest Mark V boards. Only purchase from suppliers providing:

   • Fieldbus communication testing (Profibus DP, MODBUS RTU, Foundation Fieldbus)

   • LED testing (all 28 LEDs)

   • Channel verification (all 80 terminals, 2A per channel)

   • Fuse verification (20 fuses, 2A)

   • Current sensing validation (2A per channel)
     Lead times: 22-28 weeks.

8. Stock spares – Maintain at least two spares on-site.

Important Precautions

• Power down completely – De-energize the entire system before insertion or removal. Hot-swapping is not supported.

• ESD protection – Use wrist strap and anti-static mat.

• Wiring termination – Ensure conventional field wires are properly stripped and securely clamped. Use appropriate wire gauge (12-22 AWG).

• Fieldbus cabling – Use only shielded fieldbus cables. Ensure proper termination and grounding.

• Protocol configuration – Set DIP switches correctly for the desired fieldbus protocol before installation.

• Fuse replacement – Replace fuses only with specified types and ratings (2A).

• Check total current draw – Ensure total current draw on each rail does not exceed capacity.

• Signal segregation – Route conventional analog/digital signals separately from fieldbus cables.

• Fieldbus network management – Ensure proper network termination and addressing. Monitor FB-ERR LED.

• Cleaning – Use compressed air only (max 50 PSI). No liquids.

• Storage – Store at 10-30°C, 20-50% RH. Rotate every 24 months.

Final Expert Recommendation

The DS200RTBAG2AFB is the ultimate Mark V remote terminal board for high-density, high-current distributed control with fieldbus integration, offering 80 terminals, 2A per channel output capacity, and an integrated fieldbus interface (Profibus DP, MODBUS RTU, or Foundation Fieldbus). It is the definitive solution for installations requiring the highest density, highest current, and fieldbus integration in a single remote board.

Select the DS200RTBAG2AFB only when:

• You have more than 64 remote field connections to terminate (up to 80)

• Your output devices require more than 1A per channel (up to 2A)

• You need fieldbus integration (Profibus DP, MODBUS RTU, or Foundation Fieldbus)

• You need to combine high-density conventional I/O with fieldbus communication

• You have a clean indoor environment (no conformal coating required)

However, the DS200RTBAG2AFB has no conformal coating and is exceedingly rare (22-28 week lead times). Consider these alternatives:

• DS200RTBAG1AFB (coated, 64 terminals, 1A per channel, fieldbus) – if coating is required and capacity is sufficient

• DS200RTBAG2A (uncoated, 80 terminals, 2A per channel, no fieldbus) – if fieldbus is not required

• DS200RTBAG2AFB with external protective measures – if the higher density and current are essential and coating cannot be avoided

When sourcing, ensure comprehensive documentation – fieldbus communication validation, LED testing, channel verification, and fuse verification. Given its exceedingly rare availability, maintain at least two spares on-site. Properly deployed, this board provides years of reliable, high-density, high-current remote I/O with fieldbus integration for Mark V turbine control systems.