Figure 139: Alarm Relay Contacts; Table 88: Alarm Relay Contacts - Juniper MX2020 Hardware Manual

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Copyright © 2015, Juniper Networks, Inc.
2
(0.08 and 2.08 mm ); the wire which is not provided. Use the gauge of wire appropriate
for the external device you are connecting.
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 139: Alarm Relay Contacts

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

Table 88: Alarm Relay Contacts

Function No.
1
Connecting the MX2020 Router to a Console or Auxiliary Device on page 276
Connecting the MX2020 Router to a Network for Out-of-Band Management on page 275
Chapter 20: Connecting the Router to the Network
Label Description
The alarm relays consist of three
MINOR ALARM—[NC C
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 134 on page 278).
281