Figure 68: Alarm Relay Contacts; Table 33: Alarm Relay Contacts - Juniper MX2020 Hardware Manual

MX2020 3D Universal Edge Router Hardware Guide
Related
Documentation
112
To connect an external device to an alarm relay contact (see
Prepare the required length of wire with gauge between 28 AWG and 14 AWG (0.08
1.
2
and 2.08 mm ).
While the terminal block is not plugged into the relay contact, use a 2.5-mm flat-blade
2.
screwdriver to loosen the small screws. With the small screws facing left, insert wires
into the slots in the front of the block based on the wiring for the external device.
Tighten the screws to secure the wire.
Plug the terminal block into the relay contact, and use a 2.5-mm flat-blade screwdriver
3.
to tighten the screws on the face of the block.
Attach the other end of the wires to the external device.
4.
To attach a reporting device for the other kind of alarm, repeat the procedure.

Figure 68: Alarm Relay Contacts

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

Table 33: Alarm Relay Contacts

Function No.
1
Tools and Parts Required for MX2020 Router Connections on page 109
Connecting MPC or MIC Cables to the MX2020 Router on page 113
Connecting the MX2020 Router to a Console or Auxiliary Device on page 110
Connecting the MX2020 Router to a Network for Out-of-Band Management on page 109
CB-RE Interface Cable and Wire Specifications for MX Series Routers on page 388
CB-RE Interface Cable and Wire Specifications for MX Series Routers on page 388
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 68 on page 112).
Copyright © 2013, Juniper Networks, Inc.