3Com NETBUILDER II Installation Manual page 12

2-4 C 2: I
HAPTER NSTALLATION
Ejector handle
Figure 2-3 Removing a Blanking Plate
All NETBuilder II chassis are shipped with two open slots. It is recommended that you
use these open slots for your first installations. Leave the blanking plates on the other
slots in place until the slots are needed for additional module installation.
2 Insert the Ethernet module into the uncovered I/O slot as follows:
a Make sure the slot ejector handles are in an open position, as shown in Figure 2-4.
b With the connector end toward the backplane and the board panel facing you,
grasp the left and right sides of the front panel and fit the board into the I/O slot
opening.
The board fits in only one way, but to be sure the correct side is facing up, check
that the label imprints on the connector/LED panel are right side up.
c Slide the module in until the I/O panel edges just engage with the notches in the
ejector handles.
3 Press the ejector handles on both sides of the I/O slot forward and together (toward
the connector/LED panel) to engage the module and backplane connectors and
secure the module board in the slot.
Figure 2-4 shows ejector handles in open and closed positions.
Backplane connectors
Figure 2-4 View of Open and Closed I/O Slot Ejector Handles
You will feel a slight resistance as you press these handles into the closed position; it
will be the connectors engaging.
CAUTION: If the resistance is too great, it may mean that the module and backplane
connectors are not aligned. Forcing the module forward can damage board or
backplane connectors. If necessary, remove and reinsert the module, making sure the
connectors are properly aligned.
Blanking plate
Captive screws
Closed
Open