Modem Ground, Power, And Fuse Connections; Chassis Ground Interface; Figure 3-5. Modem Chassis Ground Interface (Cdm-570Al-Ip Shown) - Comtech EF Data CDM-570A Installation And Operation Manual

3.3

Modem Ground, Power, and Fuse Connections

3.3.1

Chassis Ground Interface

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.
(BOTTOM) CDMR-570AL Reduced Chassis Depth Modem -24V or -48V DC Chassis

Figure 3-5. Modem Chassis Ground Interface (CDM-570AL-IP Shown)

Use the #10-32 stud, located adjacent to the power interface module or terminal block, for
connecting a common chassis ground among equipment.
The AC power interface provides the safety ground.
Rear Panel Connectors and Pinouts
CDM-570A/570AL Satellite Modem with Optional Packet Processor
(TOP) Standard AC Chassis
(MIDDLE) Optional -24V or -48V DC Chassis
3–14
Revision 5
MN-CDM570A