Grounding - Comtech EF Data CDM-570A Installation And Operation Manual

CDM-570A/570AL Satellite Modem with Optional Packet Processor
Preface
Optional -48V DC Units: These units are fitted with two 20mm Slo-Blo fuses – one each for
positive and negative connections. They are contained within a fuse holder that is press-fit into
the body of the IEC power module.
•
For 42 to 60 volt DC operation, use T5.0A fuses if the modem has no BUC power supply.
•
For 42 to 60 volt DC operation, use T8.0A fuses if the modem is fitted with an internal BUC
power supply.
Optional -24V DC Units: The 24 volt DC-powered modems are fitted with two 20mm Slo-Blo
fuses – one each for positive and negative connections. They are contained within a fuse holder
that is press-fit into the body of the IEC power module.
•
For 20 to 36 volt DC operation, use a T5.0A fuse if the modem has no BUC power supply.
• For 20 to 36 volt DC operation, use a T6.3A fuse if the modem is fitted with an internal BUC
power supply.
CDMR-570AL Reduced Chassis Depth -48V or -24V DC L-Band units: This unit is fitted with one
Type TR5 Slo-Blo fuse contained within a screw-in receptacle located to the left of the terminal
block.
•
For 42 to 60 volt DC operation, use TR5 6.3A fuses if the modem has no BUC power supply.

Grounding

CAUTION – CORRECT GROUNDING PROTECTION IS REQUIRED TO PREVENT PERSONAL
INJURY AND EQUIPMENT DAMAGE.
THIS MODEM IS DESIGNED FOR CONNECTION TO A POWER SYSTEM THAT HAS
SEPARATE GROUND, LINE, AND NEUTRAL CONDUCTORS. THE EQUIPMENT IS NOT
DESIGNED FOR CONNECTION TO A POWER SYSTEM THAT HAS NO DIRECT CONNECTION
TO GROUND. IT IS THEREFORE IMPERATIVE DURING INSTALLATION, CONFIGURATION,
AND OPERATION THAT YOU PROPERLY GROUND THE MODEM USING THE GROUND
STUD PROVIDED ON THE MODEM REAR PANEL AND THAT THE MODEM IS ALWAYS
CONNECTED TO THE PROTECTIVE EARTH.
•
IN FINLAND: "LAITE ON LIITETTÄVÄ SUOJAMAADOITUSKOSKETTIMILLA
VARUSTETTUUN PISTORASIAAN."
•
IN NORWAY: "APPARATET MÅ TILKOPLES JORDET STIKKONTAKT."
• IN SWEDEN: "APPARATEN SKALL ANSLUTAS TILL JORDAT UTTAG."
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MN-CDM570A
Revision 3