Libert Emerson 02-790887-00 REV.C P/L1 DC Conditioner Circuit Board

The Liebert Emerson 02-790887-00 REV.C P/L1 DC Conditioner Circuit Board is a precision signal conditioning and isolation module used in Liebert UPS systems for monitoring DC voltage and current levels in power supply or inverter stages. It converts raw analog signals into scaled, filtered, and isolated control signals for accurate system feedback and regulation. Technical Description: Manufacturer: Liebert / Emerson Network Power Model / Part Number: 02-790887-00 Revision: C Type: P/L1 DC Conditioner Circuit Board Function: DC voltage and current signal conditioning, isolation, and transmission for UPS control systems Input Voltage: 24VDC (control logic supply) Input Channels: 2–4 analog DC inputs (voltage and current sense lines) Output Signal: Scaled analog feedback (typically 0–10VDC or 4–20mA) Key Components: • Precision operational amplifiers for analog signal conditioning • Optocouplers for isolation between sensing and control circuits • Zener diodes and resistive dividers for voltage scaling and protection • RC filter networks for noise suppression • Plug-in terminal blocks for quick field connection Interface: • Two green 8-pin terminal blocks for input/output wiring • 12-pin header for system interface or backplane connector • Test points provided for calibration and signal verification Protection Features: • Overvoltage and transient suppression • Channel isolation for cross-interference prevention • Reverse polarity protection on input lines PCB Material: FR4 epoxy glass laminate Mounting: Flat-panel mounting with standoffs Dimensions (approx.): 160 mm × 60 mm Operating Temperature: 0°C to +70°C Applications: • DC bus voltage and current monitoring in Liebert UPS systems • Signal conditioning for battery management and inverter regulation • Interface between sensors and control logic circuits Compliance: UL Recognized, CE Certified Please review pictures carefully and let us know if you have any questions!