Tx Matrix Plus Router Power Requirements; Table 61: Seven-Input 420-A Power Supply Electrical Specifications; Table 62: Component Power Requirements - Juniper TX MATRIX PLUS Hardware Manual

TX Matrix Plus Router Hardware Guide
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TX Matrix Plus Router Power Requirements

436

Table 61: Seven-Input 420-A Power Supply Electrical Specifications

Item Specification
DC input voltage Nominal –48 VDC, –60 VDC
Operating range: –40.0 to –72.0 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.
Input DC current 48 A @ –48 VDC (nominal) (2304 W)
rating
TX Matrix Plus Power System Description on page 41.
Connecting Power to a Seven-Input 420-A Power Supply on page 167
Replacing a DC Power Supply Cable on page 382.
TX Matrix Plus Router Power Requirements on page 436
TX Matrix Plus Power Distribution on page 439
To allow for future growth so that you can operate the router in any hardware configuration
without upgrading the power infrastructure, we recommend that you provision at least
48 A @ –48 VDC (nominal) per input.
If you do not plan to provision at least 48 A @ –48 VDC (nominal) per input, you can use
the information in Table 62 on page 436 to calculate the typical power consumption @
–48 VDC and typical thermal output for your hardware configuration. Table 62 on page 436
lists the system current requirements for various hardware components when the TX
Matrix Plus router is operating under typical voltage conditions.

Table 62: Component Power Requirements

Component
Base system (includes one host
subsystem, one TXP-CIP, cooling
system at normal speed, and craft
interface, and two power supplies)
Host subsystem (Routing Engine and
TXP-CB)
TXP-CIP
System Current
Requirement (Watts)
1139 W
156 W
33 W
Copyright © 2010, Juniper Networks, Inc.
System Current
Requirement (Amps @
–48 VDC)
23.75 A
3.25 A
0.7 A