Figure 20: 120-A Dc Pdu - Juniper PTX5000 Hardware Manual

PTX5000 Packet Transport Router Hardware Guide
36
120-A DC PDU Components
NOTE: The 120-A DC PDUs have circuit breakers and over current protection.
Figure 20 on page 36 shows the 120-A DC PDU. Each 120-A DC PDU weighs approximately
60 lb (27.2 kg).

Figure 20: 120-A DC PDU

1 1
2
3
4
5
1— Metal handle
2— Power switch
3—Air exhaust ventilation
Each 120-A DC PDU has the following components:
Four removable input power trays, labeled
power trays are hot-removable and hot-insertable.
Each 120-A input power tray weighs 1.6 lb (0.7 kg), not including cables. The input
power tray has one input, labeled
125-A circuit breaker located on the PDU above the input power tray.
LEDs to monitor the status of the power supply:
120-A DC PDU—
PDU OK
Twenty-one monitored electronic fuses for the fan trays, Control Boards, and FPCs.
4— Circuit breakers
5— Input power trays
through
0
RTN and –48 V , from left to right, and has its own
, , and
–48 V 120 A CB ON
, from left to right. The input
3
Copyright © 2017, Juniper Networks, Inc.