Liebert Emerson 02-797100-00 REV.4 System Board PLC

The Liebert / Emerson 02-797100-00 Rev. 4 System Board PLC is an industrial control logic board used in Liebert UPS and power distribution systems. It acts as the primary programmable control interface, coordinating signals between power modules, sensors, and user interfaces. Manufacturer: Emerson Network Power (Liebert brand) Model / Part No.: 02-797100-00 Rev. 4 Type: System Control / PLC Logic Board Function: Central control and signal coordination for UPS and power management systems Control Logic: Analog/digital hybrid PLC-style circuit with discrete logic components Input Power: 24 VDC regulated supply Inputs/Outputs: • 8–12 analog input channels for voltage, current, and sensor signals • 8–12 digital control outputs via pluggable terminal blocks • Multiple ribbon cable headers for subsystem interface (visible along board edge) • Two relay output channels for high-level alarm or contact closure Communication: TTL or proprietary serial interface to supervisory control module Protection Features: • Optocoupler isolation for I/O channels • On-board fusing and suppression components • Transient voltage protection on input lines Indicators: Per-channel LED activity indicators for diagnostics Board Components: • Precision resistors and capacitors for signal conditioning • Dual relays for load or alarm control • Modular pluggable connectors for system integration PCB Dimensions: Approx. 11 in × 7 in (280 × 180 mm) PCB Material: FR-4 industrial-grade, 94V-0 rated Applications: • Liebert UPS system logic controller • Power management and switching coordination • Battery monitoring and load transfer control • Data center and industrial UPS automation systems Country of Origin: USA Please review pictures carefully and let us know if you have any questions!