3Com NETBUILDER II Installation Manual page 9

a
Loosen captive screws
with small screwdriver
b Push tab to the side
c Slide filler panel
out of rear panel
WARNING: Only remove the filler panel from the I/O slot that will house the RS-232
3-Port module. All unused I/O slots require filler panels to maintain proper cooling of
the unit and regulatory compliance. Failure to cover open slots can result in
overheating of the NETBuilder II system and voiding of the warranty.
2 Insert the module into the slot.
1
Make sure module
is right side up
2
Grasp left and
right sides of
LED panel
3
Slide board
along guide
rails until it
engages
ejector tab
notch
3 Hand-tighten the captive screws. Then gently tighten them with a small (1/8 - 3/16")
screwdriver. Do not overtighten.
A solid connection of the connector/LED panel to the chassis is required for proper
operation. Do not use the screws to force the board into place.
Refer to "Cabling the Module"to finish the installation.
CEC
CPU ACT PKT FWD
®
SELF TEST
STATUS
1 2 3 4 BOOT POWER
FDDI MAC
BYPASS
®
A STATUS B STATUS
STATUS
1
A B
FDDI PHY
COMPLIES WITH 21 CFR
®
3COM CORP. BLDG. 300
SANTA CLARA, CA
SINGLE-MODE
2
SINGLE SINGLE
3
4
FDDI MAC
®
A STATUS
2
3
HSS RS-232
® 3PORT
4
4
Push ejector tab closed
until the module is flush
with the chassis
Installing the Module in a 4- or 8-Slot Chassis
CONSOLE AUXILIARY DIAGNOSTIC
1040.10 & 1040.11
NOVEMBER 1993
BYPASS
B STATUS
STATUS
STATUS
1-5
8
7
6
5