Table 28: M40E Component Power Requirements - Juniper M40E Hardware Manual

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Appendix D: Power Guidelines, Requirements, and Specifications for the M40e Router
Table 27: M40e Power System Electrical Specifications (continued)
Item
DC input voltage
DC system current rating
DC maximum system input
power

Table 28: M40e Component Power Requirements

Component
Base system (cooling system, power supplies, and craft
interface)
Host module (Routing Engine and MCS)
M40e Type 1 and Type 2 FPCs
PCG
SFM
You can use the information in Table 28 on page 275 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 M40e
Multiservice Edge Router PIC Guide.
Power consumption for minimum configuration:
Base system + 1 FPC + 1 SFM + 1 host module + 2 PCGs + 4 PICs =
7 A + 1.6 A + 1.3 A + 1.3 A + 2(0.2 A) + 4(0.625 A) =
7 A + 1.6 A + 1.3 A + 1.3 A + 0.4 A + 2.5 A = 14.1 A @ 48 V = 677 W DC
Power consumption for maximum configuration:
Base system + 8 FPCs + 4 SFMs + 2 host modules + 2 PCGs + 32 PICs =
10 A + 8(1.6 A) + 2(1.3 A) + 2(1.3 A) + 2(0.2 A) + 32(0.625 A) =
10 A + 12.8 A + 2.6 A + 2.6 A + 0.4 A + 20 A = 48.4 A @ 48 V = 2323 W DC
Specification
Operating range: –40.5 to –72 VDC
NOTE: If the input voltage from the DC power source drops below
–40.5 VDC, the platform automatically shuts down. During
automatic shutdown, the circuit remains active. When the input
voltage returns to –42.75 VDC, the platform automatically starts
up again and the system returns to normal operation within 30
minutes. No operator intervention is required.
Nominal: –48 VDC, –60 VDC
54 A @ –48 VDC (nominal)
2445 W
Power Requirement (Amps)
7-10 A @ –48 V
1.3 A @ –48 V
1.6 A @ –48 V
0.2 A @ –48 V
1.3 A @ –48 V
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