Device; Replacing An Mx104 Clocking Or Timing Cable; Removing An Mx104 Clocking Or Timing Cable; Replacing Mx104 Hardware Components - Juniper MX104 Hardware Manual

Replacing an MX104 Clocking or Timing Cable

Copyright © 2014, Juniper Networks, Inc.
Connecting the MX104 Router to an External Alarm-Reporting Device
Ensure that you have the following parts and tools available:
Electrostatic discharge (ESD) grounding strap
2.5-mm flat-blade (–) screwdriver
To connect the router to external alarm-reporting devices, attach wires to the
relay contacts on the front panel of the router. A system condition that triggers the red
or yellow alarm on the router also activates the corresponding alarm relay contact.
The terminal blocks that plug into the alarm relay contacts are supplied with the router.
They accept wire of any gauge between 20 AWG (0.52 mm
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:
Prepare the required length of wire with gauge between 20 AWG (0.52 mm
1.
2
AWG (2.08 mm ).
Attach an ESD grounding strap to your bare wrist and connect the strap to one of the
2.
ESD points on the chassis.
While the terminal block is not plugged into the relay contact, use a screwdriver to
3.
loosen the small screws on its side. With the small screws on its side 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.
Orient the terminal block according to the labels to the left of the appropriate relay
4.
contact ( means "normally closed,
NC
open").
Plug the terminal block into the relay contact and use a screwdriver to tighten the
5.
screws on the face of the block.
Attach the other end of the wires to the external device.
6.
If attaching a reporting device for the other kind of alarm, repeat the procedure.
Removing an MX104 Clocking or Timing Cable on page 85
Installing an MX104 Clocking or Timing Cable on page 86

Removing an MX104 Clocking or Timing Cable

To remove a cable connected to a clocking or timing device:
Attach an ESD grounding strap to your bare wrist and connect the strap to one of the
1.
ESD points on the chassis.
Press the tab on the connector, and pull the connector straight out of the port.
2.
Chapter 13: Replacing MX104 Hardware Components
2
) and 14 AWG (2.08 mm
means "common," and
C NO
ALARM
2
),
2
) and 14
means "normally
85