Optional -24V Or -48V Dc Chassis Power And Fusing; Optional Dc Operation - Apply Power; Figure 3-9. Modem Optional Dc Chassis (Cdm-570Al-Ip Shown); Figure 3-10. Apply Power To The Optional Dc Chassis - Comtech EF Data CDM-570A Installation And Operation Manual

CDM-570A/570AL Satellite Modem with Optional Packet Processor
Rear Panel Connectors and Pinouts
3.3.3.2

Optional -24V or -48V DC Chassis Power and Fusing

Input Power
Input Voltage
Modem Connector Type
User Mating Connector
Fuse Protection

Figure 3-9. Modem Optional DC Chassis (CDM-570AL-IP shown)

3.3.3.2.1 Optional DC Operation – Apply Power
Do these steps (Figure 3-10):
WARNING! ENSURE THAT THE POWER IS REMOVED FROM THE DC CIRCUIT BEFORE
PROCEEDING!
DC Power Specifications
• Without optional Packet Processor or CnC: 29W typical, 32W maximum
-48V
• With optional Packet Processor, without CnC: 42W typical
-24V
• With optional Packet Processor and CnC: 48W maximum
-48V
48V DC nominal (43-60V)
-24V
24V DC nominal (20-36V)
Corcom PS series
Corcom GA210 or Molex 03-12-1026
Use two (2X) 20mm Slo-Blo fuses for positive and return fusing. Fuses are contained
within a fuse holder that is press-fit into the body of the IEC power module:
• Use T5.0A fuses for units without a BUC
• Use T8A fuses for units with a BUC

Figure 3-10. Apply Power to the Optional DC Chassis

Feature
1
2
3–19
MN-CDM570A
Revision 3
Description
Power Cord Connector
Press Fit Fuse Holder