The official manual (typically part number 1553-CNE 101 41 or similar variants) is the essential engineering document for installation, operation, troubleshooting, and firmware management of this unit. The manual provides precise electrical and mechanical limits:

1. Overview The Ericsson PSU 4813 is a high-efficiency, hot-swappable rectifier module designed for the Ericsson BMR 4813 power system family. It converts AC mains power (85–290 VAC) into a nominal -48 VDC output, used extensively in telecom base stations, microwave nodes, and enterprise network racks.