User's Manual

Table Of Contents
Part # 430-4G-050-00-006
© 2011 - L-1 Identity Solutions Inc. All rights reserved
Planning the Installation
with accidental AC power line interchanges, present serious ground fault problems for
installers. With a ground fault, the signal reference between subsystems may be 115 VAC
apart. If these subsystems are interconnected, the large potential difference can cause
equipment damage or personal injury. L-1 Identity Solutions recommends using a dedicated
regulated DC power supply.
All factory-supplied power supply assemblies are either switching or regulated linear supplies
and are isolated for safety and to minimize ground loop problems.
29