1. Basic Product Information

• Part Number: 5X00226G04

• Manufacturer: Emerson Automation Solutions (Former Westinghouse)

• Product Type: High-reliability dual-power redundant 8-slot I/O backplane base unit

• Compatible System: Ovation Distributed Control System

• Slot quantity: 8 standard Ovation electronic I/O module slots

• Power supply mode: Dual redundant 24VDC logic power input (N+1 power backup)

• Installation method: Fixed installation inside standard 19-inch control cabinet

• Protection class: IP20 (cabinet internal installation); full PCB conformal coating (moisture-proof, salt-fog resistant, anti-corrosion, dust-proof)

• Maintenance feature: Individual I/O module hot swappable; backplane power supply does not need shutdown during module replacement

• Structure: Integrated backplane bus + independent slot fuse protection + dual power distribution terminal block, standard FRU field replaceable unit

• Origin: United States

2. Core Technical Specifications & Key Upgraded Features

2.1 Bus & Redundant Power Supply Upgrade (Core G04 Differentiation)

1. Dual redundant 24VDC power input: Two independent power access terminals are reserved, supporting dual power supply automatic switching; single power circuit failure will not cause backplane power loss, greatly improving rack power supply reliability for critical control loops.

2. Built-in AC surge absorption and anti-reverse polarity protection circuit at power inlet, resisting instantaneous grid voltage surge and wiring misconnection damage.

3. Upgraded fully shielded differential backplane bus, lower signal crosstalk and transmission latency; deterministic scan cycle stable within 10ms, applicable to fast PID closed-loop regulation and SOE event sequence recording loops.

4. Each slot configures independent quick-blow fuse overcurrent protection; overload or short-circuit of one I/O module only isolates the corresponding slot power, without affecting other slots and overall bus communication.

5. Optimized internal power trace layout, extremely low full-load voltage drop, stable 24VDC output even when all 8 slots are fully loaded simultaneously.

2.2 Mechanical & Harsh Environment Adaptability Upgrade

• Full PCB conformal three-proof coating on the basis of G03 version, further optimized coating thickness and adhesion; applicable to coastal salt fog environment, chemical plant corrosive gas environment, sewage treatment high-humidity cabinet environment, effectively preventing PCB pin corrosion, leakage current and creeping discharge faults.

• Thickened reinforced aluminum alloy frame plus integrated shock absorption cushion structure, stronger anti-vibration performance than G03 version, suitable for cabinet areas with long-term fan vibration and nearby large rotating equipment vibration.

• Double locking buckle + high-precision positioning guide rail design; gold finger keeps reliable electrical contact after frequent plugging and unplugging of I/O modules, avoiding poor contact failure caused by long-term vibration.

• Pin-to-pin fully backward compatible with 5X00226G01/G02/G03 backplanes, direct replacement without cabinet reconstruction and secondary wiring modification during system renovation.

2.3 Environmental & Certification Indicators

• Operating temperature range: 0℃ ~ +60℃

• Storage temperature range: -40℃ ~ +85℃

• Relative humidity: 5%–95% RH, non-condensing; coated PCB allows long-term stable operation under near-condensation high humidity conditions

• Fully complies with IEC 61000 series industrial EMC electromagnetic compatibility standards, strong anti-interference ability against frequency converters and high-power equipment nearby

• Certified with CE, UL international industrial safety certifications

• Extended service life design, fully matched with the full lifecycle of complete Ovation DCS control equipment

2.4 Operation & Maintenance Advantages

• Modular split design: only the faulty single I/O module needs to be replaced during maintenance, no need to disassemble or replace the entire backplane.

• Dual power redundant design eliminates single point of power failure for the I/O rack, suitable for critical unit uninterrupted control requirements.

• Unified spare part specification, convenient centralized inventory management for power plants, petrochemical plants, offshore platforms and other high-reliability users.

• Applicable to new severe environment cabinet assembly, system capacity expansion, old Ovation system upgrade reconstruction and large-scale I/O point transformation projects.

3. Application Fields