Allied Telesis AT-AR021 (S) BRI-S/T Manuale di installazione - Pagina 6

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Installation and Safety Guide

Installing a PIC

This section describes the procedure for installing a PIC. You should also follow this

procedure, in particular the safety procedures and warnings, when replacing or

removing a PIC.

Caution You cannot install PICs into an AT-AR040 NSM that has power applied to

it. This includes NSMs that have been deactivated using the hot swap button, but not

physically removed from the switch or router. To ensure that all power is removed

from the NSM bay, you must either physically remove it from the switch or router

using the hot swap method, or disconnect all power sources to the switch or router.

Read the safety information.

For safety information, see the Installation and Safety Guide shipped with your

switch or router. You can also download the complete documentation for your

switch or router from www.alliedtelesis.com/support/software/.

Gather the tools and equipment you will need.

A medium-sized flat-bladed screwdriver may be useful when loosening the PIC

thumbscrews. You should also have any cables required for connecting the PIC

to a wide area network or other network devices.

Remove power to the switch or router.

Warning Do not install a PIC into an NSM bay or PIC bay base unit without

first removing power from the switch or router. Be sure to disconnect both the

main power supply and any attached redundant power supply. Installing a PIC

with the switch or router powered ON can damage the PIC, NSM and base unit.

Remove all TNV connections to existing PICs.

Warning Remove any cables attached to the external WAN ports of the

AT-AR020, AT-AR021 and AT-AR027 PICs, as these supply TNV into the

switch or router. Dangerous voltages may be present on some parts of the

board, even if the switch or router is powered OFF.

Install the AT-AR040 NSM if required.

Use the installation instructions in the Network Service Module Installation and

Safety Guide to install an AT-AR040 NSM.

Remove the PIC bay faceplate, NSM PIC bay faceplate, or existing PIC.

Loosen the thumbscrews to remove the faceplate or PIC. Keep the faceplate

for future use. If you remove the PIC, replace the faceplate to prevent dust and

debris from entering the switch or router and to maintain proper airflow.