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Electrical Specifications for the M120 DC Power Supply


Table 1 lists the DC power supply electrical specifications.

Table 1: DC Power Supply Electrical Specifications



Maximum output power

2100 W

DC input voltage

Nominal: –48 VDC, –60 VDC

Operating range: –40.0 to –72 VDC

Note: If the input voltage from the DC power source drops below -37.5 to -39.5 VDC, the router automatically shuts down. During automatic shutdown, the circuit remains active. When the input voltage returns to –43.0 to –44.00 VDC, the router automatically starts up again and the system returns to normal operation within 30 minutes. No operator intervention is required.

DC input current rating

60 A @ –48 VDC

Internal Supplementary Protector

60 A