111
9 Retrofitting optional boards
9.1
Installing optional boards
The following step-by-step table explains in detail the procedure for retrofitting
optional boards:
DANGER!
Installation 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
Before changing or expanding the number of optional boards being
used, please perform an energy balance test.
⇨
Chapter 9.2 "Energy balance test", page 114
2
Disconnect all phases of the power being supplied to the device
(power grid, outside power supply sources for relays/solid-state re-
lays etc.).
3
Identify the assembly from the part number on the sticker attached
to the packaging as well as from the accessories table.
⇨
Chapter 4.4 "Accessories", page 21
Using the block diagram, select a suitable slot for the optional
board.
⇨
Chapter 3.2 "Block diagram", page 13
4
Open the terminal compartment on the device.
⇨
Chapter 6.2.1 "Opening the terminal compartment on the de-
vice", page 35
5
Localize the selected slot in the device from the labeling on the cov-
er plate over the optional board slots or the connection diagram.
⇨
Chapter 6.4.1 "Overview of connections", page 43
6
Unplug all plug-in screw terminals and interface cables that prevent
removal of the cover plate.
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