Table 37: DC Power Supply Electrical Specifications (continued)
SpecificationItem
7 A maximumDC input current
190 WPower supply output
1 ms minimumOutput holdup time
NOTE: The DC power supply in EX4200 switches does not support Power
over Ethernet (PoE); you can use either an external power injector or an AC
power supply to supply power to PoE devices that you connect to the switch.
NOTE: For DC power supplies, we recommend that you provide at least 7.5 A
at 48 VDC and use a facility circuit breaker rated for 10 A minimum. Doing so
enables you to operate the switch in any configuration without upgrading
the powerinfrastructure,and ensures that the switchfunctions at full capacity
using multiple power supplies.
Related
Documentation
AC Power Cord Specifications for EX4200 Switches on page 74•
• Power Supply in EX4200 Switches on page 33
• General Safety Guidelines and Warnings on page 243
• General Electrical Safety Guidelines and Warnings on page 271
AC Power Cord Specifications for EX4200 Switches
A detachable AC power cord is supplied with the AC power supplies. The coupler is type
C13 as described by International Electrotechnical Commission (IEC) standard 60320.
The plug at the male end of the power cord fits into the power source outlet that is
standard for your geographical location.
CAUTION: The AC power cord provided with each power supply is intended
for use with that power supply only and not for any other use.
NOTE: In North America, AC power cords must not exceed 4.5 meters
(approximately 14.75 feet) in length, to comply with National Electrical Code
(NEC) Sections 400-8 (NFPA 75, 5-2.2) and 210-52 and Canadian Electrical
Code (CEC) Section 4-010(3). The cords supplied with the switch are in
compliance.
Copyright © 2017, Juniper Networks, Inc.74
EX4200 Switch Hardware Guide
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