Instruction manual

5. Adding and Replacing Optional Modules
149
CAUTION
While holding the levers, push the basic switching unit carefully until
the levers touch the Switch.
Failure to do this could result in a Switch malfunction or fault.
CAUTION
When you install a basic switching unit, open the levers as shown in
the figure. If the levers are closed or opened too much, they might be
damaged when you install the unit.
Step 3
Close the levers of the basic switching unit. (The unit is inserted completely.)
Figure 5-36 Installing a basic switching unit (3)
(1) Lever
CAUTION
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.
Step 4
Tighten the screws of the basic switching unit.