User's Manual

First InterComm™ system VCA100 user manual A29798 September 2008 iii
– DC power — Ensure power into the
First InterComm system does not
exceed 24 Vdc.
– Explosive environments — Ensure
the First InterComm system is turned
off before entering a blasting area
or in areas posted “TURN OFF TWO-
WAY RADIO.” Sparks in a potentially
explosive atmosphere can cause an
explosion or fire resulting in bodily
injury or death.
Warnings and precautions (continued)
General precautions
Nearly every electronic device is
susceptible to electromagnetic
interference (EMI) if inadequately
designed, shielded, or otherwise
configured for electromagnetic
compatibility. It may be necessary
to conduct compatibility testing to
determine if any electronic equipment
used in or around vehicles is sensitive to
external RF energy, or if any procedures
are needed to eliminate or mitigate
the potential for interaction between
the First InterComm system and other
equipment or devices.
– Facilities — To avoid EMI or
compatibility conflicts, turn off
the First InterComm system near
any facility where posted notices
so instruct, such as hospitals or
healthcare facilities.
– Vehicles — To avoid possible
interaction between the First
InterComm system and vehicle
electronic control modules (such
as antilock brakes and engine or
transmission controls), the First
InterComm system should be installed
only by a professional installer only.
– Pacemakers — To avoid potential
interference with pacemaker
functions, maintain a minimum
separation of 12 inches between First
InterComm system components (the
VCA100 and associated antennas).
Electromagnetic
interference/compatibility