Liebert Emerson 02-797104-00 REV 2 P/L 2 Pre-Driver Board PCB

The Liebert Emerson 02-797104-00 REV.2 P/L2 Pre-Driver Board is a precision pre-driver interface module designed for use in Liebert UPS inverter and rectifier control systems. It acts as the intermediary between low-level control logic and high-power gate drive stages, ensuring signal integrity, timing accuracy, and isolation between control and power domains. Technical Description: Manufacturer: Liebert / Emerson Network Power Model / Part Number: 02-797104-00 Revision: 2 Type: P/L2 Pre-Driver Board PCB Function: Provides pre-amplification, signal conditioning, and isolation for inverter or rectifier gate driver circuits Input Voltage: 24VDC logic/control Channels: 12 to 16 individual pre-driver circuits (depending on UPS configuration) Key Components: • Multiple high-speed switching transistors (NPN/PNP pairs) for signal amplification • Precision resistors and zener diodes for voltage regulation • Optocouplers for signal isolation between logic and driver stages • Filtering capacitors for noise suppression • Header connectors for backplane and gate drive board interfaces Interface: • Three multi-pin connectors for interconnection with main control and gate drive boards • Auxiliary connector for monitoring and feedback signals Protection Features: • Input transient and overvoltage protection • Channel isolation to prevent cross-talk • Thermal and electrical stability ensured by distributed components PCB Material: FR4 epoxy glass laminate, double-sided plated-through Mounting: Vertical or chassis-mounted inside UPS control bay Dimensions (approx.): 190 mm × 130 mm Operating Temperature: 0°C to +70°C Applications: • Liebert UPS inverter and rectifier systems • Signal interface between control logic and gate driver boards • Precision pre-driver stage for SCR and IGBT switching networks Compliance: UL Recognized, CE Certified Please review pictures carefully and let us know if you have any questions!