NEC NF2300-SR412E User Manual page 108

(3) Set the DIP switch and AL-PA switch on the new controller for replacement to be
the same as that of the defected controller.
(4) Open the ejectors of the controller for replacement, insert the controller into the slot
to the end securely. (The lock of the protection shutter closed when the controller
was pulled out is automatically released by inserting the controller.)
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