Allied Telesis AT-A19 - Manual (Page 11)

AT-A1x Series Expansion Modules Quick Install Guide
5
Installing the Expansion Module
To install an expansion module, perform the following steps:
1. Disconnect the switch’s power cord, if attached.
Warning
Make sure to disconnect the power cord before installing the expansion
module. Installing an expansion module without doing so can damage
the module.
Warning
The power cord is used as a disconnect device. To de-energize
equipment, disconnect the power cord. ! 9
2. Remove a blank faceplate from one of the expansion slots by unscrewing
the faceplates two captive screws. Refer to Figure 6. Do not remove the
blank faceplate if you are not installing an expansion module into the
slot.
Figure 6 Removing the Blank Panel
If you are installing only one expansion module in the switch, you should
install the module in slot A. While the module will work in slot B with slot
A empty, the port numbering assignments will change if you later install
a module in slot A. This could affect the VLAN memberships on the
switch and this could require you to adjust your VLAN configurations.
A
B
Captive Screws
Blank Faceplate