CRS-180 70/140 MHz IF 1:1 Redundancy Switch
MN/CRS180.IOM
Preface
Revision 11
xiii
CAUTION – You should carefully review the following information.
Safety and Compliance
Electrical Safety and Compliance
The unit complies with the EN 60950 Safety of Information Technology Equipment (Including
Electrical Business Machines) safety standard.
The equipment is rated for operation at ±12 volts DC. It has a maximum power consumption of
4.5 Watts, and draws a maximum of 250 mA at +12 volts DC and 120 mA at -12 volts DC. The
power supply current is, in all circumstances, supplied by either a single Comtech EF Data
modem, or a pair of these modems.
CAUTION – IF THE UNIT IS OPERATED IN A VEHICLE OR MOVABLE INSTALLATION,
MAKE SURE THE UNIT IS STABLE. OTHERWISE, EN 60950 SAFETY IS NOT GUARANTEED.
Electrical Installation
CAUTION – THIS SWITCH IS DESIGNED TO WORK WITH MODEMS THAT MUST BE
CONNECTED TO A POWER SYSTEM THAT HAS SEPARATE GROUND, LINE, AND
NEUTRAL CONDUCTORS. DO NOT OPERATE THE UNIT WITHOUT A DIRECT
CONNECTION TO GROUND.
Operating Environment
CAUTION – DO NOT OPERATE THE UNIT IN ANY OF THESE EXTREME OPERATING
CONDITIONS:
•
AMBIENT TEMPERATURES LESS THAN 0° C (32° F) OR MORE THAN 50° C (122° F).
•
PRECIPITATION, CONDENSATION, OR HUMID ATMOSPHERES OF MORE THAN 95%
RELATIVE HUMIDITY.
•
UNPRESSURIZED ALTITUDES OF MORE THAN 2000 METRES (6561.7 FEET).
•
EXCESSIVE DUST.
•
FLAMMABLE GASES.
•
CORROSIVE OR EXPLOSIVE ATMOSPHERES.