Juniper Networks MX480 - Manual (Page 123)

Figure 61: Auxiliary and Console Ports
Figure 62: Routing Engine Console and Auxiliary Cable Connector
Connecting the MX480 Router to an External Alarm-Reporting Device
To connect the router to external alarm-reporting devices, attach wires to the RED and
YELLOW relay contacts on the craft interface. (See Figure 63 on page 99 .) A system
condition that triggers the red or yellow alarm LED on the craft interface 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 28-AWG and 14-AWG (0.08 and 2.08 mm
2
),
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 Figure 63 on page 99 ):
1. Prepare the required length of wire with gauge between 28-AWG and 14-AWG (0.08
and 2.08 mm
2
).
2. While the terminal block is not plugged into the relay contact, use a 2.5-mm flat-blade
screwdriver to 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.
3. Plug the terminal block into the relay contact, and use a 2.5-mm flat-blade screwdriver
to tighten the screws on the face of the block.
4. Attach the other end of the wires to the external device.
To attach a reporting device for the other kind of alarm, repeat the procedure.
Figure 63: Alarm Relay Contacts
99 Copyright © 2013, Juniper Networks, Inc.
Chapter 9: Connecting the MX480 Router