Connecting The Alarm Relay Wires To The Mx2020 Craft Interface; Figure 140: Alarm Relay Contacts; Table 89: Connecting Alarm Relay Contacts - Juniper MX2020 Hardware Manual

MX2020 3D Universal Edge Router Hardware Guide

Connecting the Alarm Relay Wires to the MX2020 Craft Interface

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Documentation
282
To connect the alarm relay wires between a router and an alarm-reporting device (see
Figure 140 on page 282):
Prepare the required length of replacement wire with gauge between 28 AWG and 14
1.
AWG (0.08 and 2.08 mm
Insert the replacement wires into the slots in the front of the block (see
2.
Table 89 on page 282). Use a 2.5 mm flat-blade screwdriver to tighten the screws and
secure the wire.
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
3.
the strap to one of the ESD points on the chassis.
Plug the terminal block into the relay contact, and use a 2.5 mm flat-blade screwdriver
4.
to tighten the screws on the face of the block.
Attach the other end of the wires to the external device.
5.

Figure 140: Alarm Relay Contacts

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

Table 89: Connecting Alarm Relay Contacts

Function No. Label
1
MINOR ALARM—[NC C NO]
MAJOR ALARM—[NC C NO]
Installing the MX2020 Craft Interface on page 299
Removing the MX2020 Craft Interface on page 451
Maintaining and Verifying the Status of the MX2020 Craft Interface on page 399
2
).
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.
Copyright © 2015, Juniper Networks, Inc.