Saia-Burgess
Controls Ltd.
Hardware Manual for the PCD3 Series│Document 26/789; Version E 5│31.01.2005
Communication interfaces
4
4-16
Serial interfaces on I/O module Slot 0
Supply option
Common supply for control and drive
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When using the PCD7.F180 connection module, the supply voltage to the PC control
unit must be at least 24V DC, ± 5 % (and not the default tolerance of ± 20 %).
With a separate DC or AC supply to the drives, it is especially important to ensure
that the PCD control unit is connected to the earth (Minus pole) of the drive supply.
The earth serves as a common base for communication.
For details see Technical Information P+P26/342 “MP-Bus interface for BELIMO
®
actuating drives”
4.6
LIOs and RIOs
The PCD3.Cxxx and Txxx interfaces are described in the section on “PCD3.Mxxx0
Classic CPUs and expansion housings“ in the explanation of the expansion housings.