User's Manual

Page 13

Selecting the Right Power Supply

Most power supplies in the market today provide good input/output isolation,

however those which do not provide isolation (or have hit leakage capacitance),

coupled with accidental AC power lines interchange, present serious ground fault

problems for installers. With ground fault, the signal reference between subsystems

may be 115 VAC apart. If these subsystems are interconnected, the large

potential difference will cause equipment damage or personal injury. We

recommend use of isolated power supplies only.

All factory supplied power supply assemblies are either switching or regulated

linear supplies and are isolated for safety and to minimize ground loop problems.

WARNINGWARNING

Use only a UL-Listed Class II power supply at 12V DC, 500mA.