Connecting Pic Cables To The T640 Router - Juniper T640 Hardware Manual

T640 Core Router Hardware Guide

Connecting PIC Cables to the T640 Router

120
To connect an external device to an alarm relay contact:
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 ( NC means "normally closed,
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.
If attaching a reporting device for the other kind of alarm, repeat the procedure.
The router supports PICs that use various kinds of network cable, including multimode
and single-mode fiber-optic cable. For information about the type of cable used by each
PIC, see the PIC guide for your router.
You connect PICs to the network by plugging in network cable. To connect cable to the
PICs (see Figure 71 on page 121, which shows a fiber-optic PIC):
Have ready a length of the type of cable used by the PIC. For cable specifications, see
1.
the T640 Core Router PIC Guide.
If the PIC cable connector port is covered by a rubber safety plug, remove the plug.
2.
WARNING: Do not look directly into a fiber-optic transceiver or into the
ends of fiber-optic cables. Fiber-optic transceivers and fiber-optic cable
connected to a transceiver emit laser light that can damage your eyes.
CAUTION: Do not leave a fiber-optic transceiver uncovered except when
inserting or removing cable. The safety cap keeps the port clean and
prevents accidental exposure to laser light.
Insert the cable connector into the cable connector port on the PIC faceplate.
3.
Arrange the cable in the cable management system to prevent it from dislodging or
4.
developing stress points. Secure the cable so that it is not supporting its own weight
as it hangs to the floor. Place excess cable out of the way in a neatly coiled loop in
the cable management system. Placing fasteners on the loop helps to maintain its
shape.
C means "common," and (
Copyright © 2010, Juniper Networks, Inc.
NO means "normally