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11 Retrofitting optional boards
11.1 Inserting optional boards
The following step-by-step table explains in detail the procedure for retrofitting
optional boards:
DANGER!
Insertion and removal of optional boards must be performed only by qualified
personnel. To ensure electrical safety, country-specific regulations must be ob-
served.
Step Action
1 Disconnect all phases of the voltage supply to the device (power
grid, outside power supply sources for relays/solid-state relays
etc.).
2 Identify the optional board from the part number on the sticker at-
tached to the packaging as well as from the connection socket and
the accessories table.
v Chapter 4.4 "Accessories", Page 25
Using the block diagram, select a suitable slot for the optional
board.
v Chapter 3.2 "Block diagram", Page 19
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