Table 51: Ac Power Supply Electrical Specifications; Table 52: Dc Power Supply Electrical Specifications; Table 53: Component Power Requirements - Juniper M120 Hardware Manual

Copyright © 2018, Juniper Networks, Inc.
Table 50: Power System Electrical Specifications (continued)
Item
DC input voltage
DC system current rating
(per power supply)

Table 51: AC Power Supply Electrical Specifications

Item
Maximum output power
AC input voltage
AC input line frequency
AC input current rating

Table 52: DC Power Supply Electrical Specifications

Item
Maximum output power
DC input voltage
DC input current rating
Internal Supplementary
Protector

Table 53: Component Power Requirements

Component
Cooling system (normal speed)
Specification
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.
48 A @ –48 VDC (nominal)
Specification
2100 W
Operating range: 100 to 240 VAC (nominal)
47 to 63 Hz
28 A @ 100 VAC (15 A top inlet, 13 A bottom inlet)
14 A @ 240 VAC
Specification
2100 W
Nominal: –48 VDC, –60 VDC
Operating range: –40.0 to –72 VDC
60 A @ –48 VDC
60 A
Chapter 9: Preparation Overview
DC Current
DC Power Requirement
Requirement (Amps @
(Watts) –48 VDC)
187 W 3.90 A
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