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M120 Router Power Requirements

 

Table 1 lists the AC and DC power system electrical specifications. Table 2 lists the AC power supply electrical specifications. Table 3 lists the DC power supply electrical specifications. Table 4 lists the power requirements for various hardware components when the router is operating under typical voltage conditions. For PIC power requirements, see the M120 Multiservice Edge Router Interface Module Reference.

Table 1: Power System Electrical Specifications

Item

Specification

AC input voltage

Operating range: 100 to 240 VAC

AC input line frequency

47 to 63 Hz

AC system current rating (per power supply)

28 A @ 100 VAC (15 A top inlet, 13 A bottom inlet)

14 A @ 240 VAC

 

DC input voltage

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 system current rating (per power supply)

48 A @ –48 VDC (nominal)

Table 2: AC Power Supply Electrical Specifications

Item

Specification

Maximum output power

2100 W

AC input voltage

Operating range: 100 to 240 VAC (nominal)

AC input line frequency

47 to 63 Hz

AC input current rating

28 A @ 100 VAC (15 A top inlet, 13 A bottom inlet)

14 A @ 240 VAC

Table 3: DC Power Supply Electrical Specifications

Item

Specification

Maximum output power

2100 W

DC input voltage

Nominal: –48 VDC, –60 VDC

Operating range: –40.0 to –72 VDC

DC input current rating

60 A @ –48 VDC

Internal Supplementary Protector

60 A

Table 4: Component Power Requirements

Component

DC Power Requirement (Watts)

DC Current Requirement (Amps @ –48 VDC)

Cooling system (normal speed)

187 W

3.90 A

Cooling system (full speed)

245 W

5.11 A

AC power supply

114 W

Not applicable

DC power supply

17 W

0.35 A

FEB

86 W

1.79 A

Type 1 FPC (without PICs)

27 W

0.56 A

Type 2 FPC (without PICs)

44 W

0.92 A

Type 3 FPC (without PICs)

34 W

0.72 A

CFPCs

54 W

1.12 A

CB (and craft interface)

38 W

0.78  A

Routing Engine 1000

35 W

0.74 A

Routing Engine 1800

110 W

2.3 A

Routing Engine 2000

71 W

1.48 A

You can use the information in Table 4 to calculate power consumption for various hardware configurations, input current from a different source voltage, and thermal output, as shown in the following examples for a DC-powered router. These examples use generalized values for PICs. For PIC power requirements, see the M120 Multiservice Edge Router Interface Module Reference.

  • Power consumption for minimum configuration:

  • Power consumption for maximum DC-powered configuration :

  • System thermal output for maximally configured DC-powered router:

  • System thermal output for maximally configured AC-powered router:

  • Current requirement adjustment for fans running at full speed (high temperature environment or cooling component failure):

  • Input current from a DC source other than –48 VDC (based on maximum configuration; applies to DC power supply only):