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The Liebert Emerson 02-790809-00 REV.1 P/L5 SS SCR Monitor Board is a solid-state control circuit board designed to monitor and manage SCR (Silicon Controlled Rectifier) performance in Liebert UPS and power conditioning systems. It provides precise detection of SCR conduction states, fault monitoring, and isolation between control logic and high-power switching components. Technical Description: Manufacturer: Liebert / Emerson Network Power Model / Part Number: 02-790809-00 Revision: 1 Type: P/L5 SS SCR Monitor Board Function: Monitors SCR operation, detects fault conditions, and controls gate drive enable/disable Input Voltage: 24VDC (logic and control supply) Monitoring Channels: Supports dual or triple SCR sets (for three-phase configurations) Key Components: • High-speed optocouplers for SCR state sensing and isolation • Operational amplifiers for signal conditioning and voltage comparison • Dual solid-state relays for control interlock • Precision resistor networks and zener diodes for threshold regulation • Dual glass fuses for circuit protection Indicators: • Multiple status LEDs (fault, gate, conduction) • Fuse protection indicator Interface: • Two green pluggable terminal blocks for input/output • Edge connectors for mainframe interface • Ribbon header for system communication Protection Features: • SCR short/open circuit fault detection • Overvoltage and overcurrent suppression • Input reverse polarity protection PCB Material: FR4 epoxy glass laminate, conformal coated Mounting: Chassis or sub-rack mounting with transparent protective cover Dimensions (approx.): 230 mm (L) × 130 mm (W) Operating Temperature: 0°C to +70°C Applications: • Liebert UPS SCR phase control circuits • Power rectifier and inverter synchronization • High-reliability fault detection and signal isolation • Gate control interlock and SCR health monitoring Compliance: UL Recognized, CE Certified Please review pictures carefully and let us know if you have any questions!
Condition: Used
Weight: 2.00
Depth: 6.00
Length: 12.00
Width: 9.00
SKU: 11740 4.S8.8.1B
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