ALS and DLS Power Supply Modules Instruction Leaflet

This document provides installation, operation, and maintenance instructions for the ALS and DLS power supply modules, which isolate relay system logic from station batteries and provide regulated ±15 Vdc outputs. It covers specifications, construction, circuit operation (including inverter, pulse width modulator, and power fold-back protection), and acceptance testing for multiple voltage variants (48V, 125V, 250V) with AMP or DIN connectors.