Connecting The M120 Router To An External Alarm-Reporting Device - Juniper M120 Hardware Manual

M120 Multiservice Edge Router Hardware Guide

Connecting the M120 Router to an External Alarm-Reporting Device

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To connect the router to external alarm-reporting devices, attach wires to the
and relay contacts on the craft interface. A system condition that triggers
YELLOW ALARM
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
which is not provided. Use the wire gauge 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 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
3.
contact ( means "normally closed,
NC
open").
Plug the terminal block into the relay contact and use a 2.5-mm flat-blade screwdriver
4.
to tighten the screws on the face of the block.
Attach the other end of the wires to the external device.
5.
Figure 53 on page
means "common," and (
C
Copyright © 2018, Juniper Networks, Inc.
RED ALARM
2
),
159):
means "normally
NO