General Electric IS215REBFH1BA I/O Expansion Board

The GE IS215REBFH1BA I/O Expansion Board is a high-reliability Relay Expansion Buffer Board used extensively in GE Mark VI and Mark VIe turbine control systems, part of GE’s renowned Speedtronic™ platform.

Specifically designed to expand relay signal capacity and maintain signal integrity between the controller and relay terminal blocks, the IS215REBFH1BA serves as an essential component in both primary and redundant I/O architectures. It ensures that critical control, trip, and alarm signals are accurately buffered, isolated, and delivered to field equipment, even in harsh industrial environments.

The board offers superior electrical isolation and buffering capabilities that protect downstream relay circuits from faults or electrical noise, making it ideal for use in gas turbines, steam turbines, power generation, and balance of plant (BoP) systems.

Built to rigorous GE industrial standards, the IS215REBFH1BA provides high reliability, extended service life, and is designed for continuous operation in demanding conditions such as those found in oil & gas, chemical, mining, and heavy manufacturing sectors.

Product Specifications

Applications

• Expansion of relay output capacity in Mark VIe and Mark VI turbine control systems

• Buffering relay drive signals in gas turbine applications

• Steam turbine protection and trip relay control

• Alarm signal isolation and distribution in generator protection systems

• Enhanced redundant control architectures in power plants

• Balance of Plant (BoP) control signal management

• Relay interfacing for oil & gas processing plants

• Petrochemical facility safety systems

• Mining and materials processing equipment control

• Industrial process automation systems for chemical and pharmaceutical sectors

• High relay channel density: Supports up to 32 relay outputs for large-scale I/O expansions

• Electrical isolation: Channel-to-channel and system-to-relay isolation protects equipment

• Optimized for Mark VI / VIe: Seamless system integration with GE Speedtronic™ controls

• Diagnostic-ready: Enables rapid troubleshooting and maintenance

• Low power operation: Efficient design with < 5 W typical power consumption

• Industrial-grade construction: Tolerant of extreme temperatures, vibration, and EMI environments

• Conformal-coated PCB: Added protection against moisture, dust, and corrosive agents

• Redundant architecture ready: Suited for critical applications with dual-path redundancy

• Long service life: Designed for 24/7 operation in mission-critical applications

• Field-replaceable: Supports hot swap in rack-mounted configurations, minimizing downtime

Frequently Asked Questions (FAQ)

1. What is the main function of the IS215REBFH1BA?

   It buffers and distributes relay control signals from GE Mark VI / VIe controllers to the relay terminal boards.

2. How many relay outputs does it support?

   Typically, the board supports 32 relay outputs.

3. Is this board compatible with both Mark VI and Mark VIe?

   Yes — the IS215REBFH1BA is fully compatible with both GE Mark VI and Mark VIe systems.

4. Does it provide signal isolation?

   Yes — the board provides channel-to-channel and channel-to-system isolation.

5. Is this board suitable for redundant control configurations?

   Yes — it is designed to work within redundant architecture environments.

6. What is the typical operating temperature range?

   -30°C to +65°C (-22°F to +149°F).

7. Does the board support hot swap replacement?

   Yes — it is a field-replaceable unit (FRU) in GE Mark VI/VIe rack systems.

8. What industries commonly use this board?

   Industries include power generation, oil & gas, chemical processing, mining, and general process automation.

9. What kind of protection does the board have against environmental hazards?

   The board is conformal-coated to withstand moisture, dust, and chemical exposure.

10. Is the board globally certified?

    Yes — the board complies with CE, UL, CSA, and RoHS standards for international deployment.