Juniper Networks T1600 - Manual (Page 6)

NOTE: These components must be installed before you can install a T1600-FPC in
the T1600 routing node.
Power Supplies
Two redundant, load-sharing DC power supplies are located at the lower rear of the
chassis in slots
PEM0 and PEM1 (top to bottom). For power specifications for the
system, power supplies, and power cables, see “T1600 Routing Node DC Power
Specifications” on page 44.
Three-Input 240-A Power Supplies
Each three-input 240-A power supply weighs approximately 25 lb. (11.3 kg) and
consists of three inputs, three 80-A circuit breakers, a fan, and LEDs to monitor the
status of the power supply. Figure 3 on page 6 shows the three-input 240-A power
supply.
Figure 3: Three-Input 240-A Power Supply
Three-Input 240-A Power Supply Inputs
The three-input 240-A DC power supply inputs are labeled INPUT 0 , INPUT 1 , and
INPUT 2 , from top to bottom. Each input consists of –48 VDC and return—each with
its own 80-A circuit breaker. The input mode switch on the faceplate allows you to
set the DC power supply to either two-input or three-input mode mode. Three-input
mode is required for the T1600 routing node. Two-input mode is not currently
supported.
Table 1 on page 7 describes which components are powered by each input.
6 ■ T1600 Upgrade Kit
T1600 Routing Node Upgrade Guide