Replacement Of Io - Grundfos IO 401 Montage- Und Betriebsanleitung

10. Replacement of IO 401

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• Switch off the power supply to the CU 401.
• Turn the locking screw to "slide position".
Use a 6 mm screwdriver for slotted screws.
Slide position
• Push the modules, which are placed next to the IO 401 and
have contact via module bus, away from the IO 401
(approx. 15 mm to each side).
• Remove the terminals and turn the locking screw to
position "unlocked".
Locked
• Remove the IO 401 module from the DIN rail by lifting it out
at the bottom.
Unlocked