Siemens Automation System S7-400 - Manual (Page 165)

Maintenance
7-17
Automation System S7-400 Hardware and Installation
A5E00850741-01
4. Fit the new filter frame:
-- Fitting the filter frame at the bottom of the base:
Insert the filter frame in the snap hinges at the base cutout and engage it
with the snap catches.
-- Fitting the filter frame at the rear edge of the base:
At about a right angle to the base, insert the filter frame in the snap hinges at
the rear edge of the base.
5. Slide the base in again and press it up.
6. Use a screwdriver to make a quarter turn clockwise and close the two
quick-release locks.
7. Replacing the filter frame will not trigger an interrupt. There is therefore no need
to press the RESET button.