Mx2020 Power Subsystem Overview; Mx2020 Power Subsystem Description; Mx2020 Three-Phase Delta And Wye Ac Power Distribution Module; Overview - Juniper MX2020 Hardware Manual

Related
Documentation

MX2020 Power Subsystem Overview

MX2020 Power Subsystem Description

Copyright © 2013, Juniper Networks, Inc.

Figure 15: Alarm Relay Contacts

1
M/S CHASSIS NUM
LC
17 18 19
6 SFB 7 CB-RE 1
7 8 LC 9

Table 18: Alarm Relay Contacts

Function No. Label
1 MINOR ALARM–[NC C NO]
MAJOR ALARM–[NC C NO]
Disconnecting the Alarm Relay Wires from the MX2020 Craft Interface on page 215
Connecting the Alarm Relay Wires to the MX2020 Craft Interface on page 217
MX2020 Power Subsystem Description on page 39

MX2020 Three-Phase Delta and Wye AC Power Distribution Module

Overview on page 42
MX2020 AC Power Supply Module Description on page 46
MX2020 AC Power Supply Module LEDs on page 48
MX2020 DC Power Distribution Module Description on page 49
MX2020 DC Power Distribution Module LEDs on page 50
MX2020 DC Power Supply Module Description on page 51
MX2020 DC Power Supply Module LEDs on page 53
The MX2020 router uses AC or DC power distribution modules (PDMs) and AC or DC
power supply modules (PSMs). The MX2020 router is configurable with up to four AC
or DC PDMs (two per subsystem), and up to eighteen AC or DC PSMs. The PSMs connect
to the top and bottom power backplanes, which distribute the output voltages produced
by the PSMs to the router components.
Chapter 2: MX2020 Hardware Components

Description

The alarm relays consist of three
terminal contacts with a normal
closed (NC), common (C), and
normal open (NO) relays that signal
a minor or major alarm when
broken.
39