To connect an external device to an alarm relay contact:
1.
Prepare the required length of wire with gauge between 28 AWG and 14 AWG (0.08
and 2.08 mm
2
).
2.
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
the strap to one of the ESD points on the chassis.
3.
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.
4.
Orient the terminal block according to the labels to the left of the appropriate relay
contact (
NC
means “normally closed,
C
means “common,” and (
NO
means “normally
open”).
5.
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.
6.
Attach the other end of the wires to the external device.
If attaching a reporting device for the other kind of alarm, repeat the procedure.
Related
Documentation
T4000 Connector Interface Panel (CIP) Description on page 27
•
•
Overview of Connecting the T4000 Router to External Devices on page 111
Connecting the T4000 Router to an External Clocking Device
To connect the router to one or two external clocking devices, connect a cable with RJ-48
connectors to one of the
EXTERNAL CLOCK INPUTS
ports on the SCG.
1.
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
the strap to one of the ESD points on the chassis.
2.
Plug one end of the cable into the appropriate
EXTERNAL CLOCK INPUTS
port on the
SCG.
3.
Plug the other end of the cable into the T1 external clocking device.
4.
Repeat the procedure for the other
EXTERNAL CLOCK INPUTS
port on the SCG.
5.
Verify that the
LINK
LED for each port is lit steadily green.
6.
Configure the port. See the
synchronization
statement for M Series and T Series in the
.
7.
Issue the
show chassis synchronization
command to check the status of the port.
user@host>
show chassis synchronization
user@host> show chassis synchronization
Clock Synchronization Status :
Clock module on SCG 0
Current state : master
Current clock state : locked to external-a
115
Copyright © 2013, Juniper Networks, Inc.
Chapter 12: Connecting the T4000 Router to External Devices
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