Disconnecting The Alarm Relay Wires From The Mx2020 Craft Interface; Removing The Mx2020 Craft Interface; Table 41: Alarm Relay Contacts On The Craft Inteface - Juniper MX2020 Hardware Manual

Disconnecting the Alarm Relay Wires from the MX2020 Craft Interface

Removing the MX2020 Craft Interface

Copyright © 2013, Juniper Networks, Inc.
Installing the MX2020 Craft Interface on page 216
3.
Connecting the Alarm Relay Wires to the MX2020 Craft Interface on page 217
4.
To disconnect the alarm relay wires from the router and an alarm-reporting device (see
Figure 88 on page 215):
Disconnect the existing wire at the external device.
1.
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
2.
the strap to one of the ESD points on the chassis.
Using a 2.5-mm flat-blade screwdriver, loosen the small screws on the face of the
3.
terminal block and remove the block from the relay contact.
Using the 2.5-mm flat-blade screwdriver, loosen the small screws on the side of the
4.
terminal block. Remove existing wires from the slots in the front of the block (see
Table 41 on page 215).
Figure 88: Alarm Relay Contacts
1
M/S CHASSIS NUM
LC
17 18 19
6 SFB 7 CB-RE 1
LC
7 8 9

Table 41: Alarm Relay Contacts on the Craft Inteface

Function No.
1
To remove the craft interface (see
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
1.
the strap to one of the ESD points on the chassis.
Detach any external devices connected to the craft interface.
2.
Loosen the captive screws at the left and right corners of the craft interface faceplate.
3.
Chapter 13: Replacing MX2020 Router Hardware Components
Label Description
MINOR ALARM—[NC C The alarm relays consist of three
terminal contacts with a normal closed
NO]
(NC), common (C), and normal open
MAJOR ALARM—[NC C (NO) relays that signal a minor or major
NO] alarm when broken.
Figure 89 on page 216):
215