Alaxala AX6300S Series Instruction Manual page 200

5. Adding and Replacing Optional Modules
CAUTION
CAUTION
Step 3
Close the levers of the network interface unit. (The unit is inserted completely.)
Figure 5-36 Installing a network interface unit (3)
(1) Lever
CAUTION
Step 4
Tighten the screws of the network interface unit.
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While holding the levers, push the network interface unit carefully until
the levers touch the Switch.
Failure to do this could result in a Switch malfunction or fault.
Open the levers as shown in the figure when you install a network
interface unit. If the levers are closed or opened too much, they might
be damaged when you install the unit.
Use the levers so that the connectors on the optional module and the
Switch will be engaged correctly. When moving the levers, move them
slowly (one second or longer) without exerting any force.
Failure to do this could result in a Switch malfunction or fault.