ABB AC 800M Manual page 114

Installing the FOUNDATION Fieldbus H1 Interface, CI852/TP852
For additional information on designing a fieldbus (connectors, cables and devices),
see fieldbus documentation.
A catalog referencing suppliers, devices, services and other fieldbus-related items, is
available for FIELDBUS ONLINE via the Internet web site.
Powering Field Devices
Field devices requiring power from the fieldbus need special power supplies
connected to the data wires (in the same way as a field device). To avoid short-
circuiting of fieldbus signals, use only power supplies with impedance
characteristics specifically designed for FOUNDATION Fieldbus.
Do not use SD82x power supply units for this purpose.
Note that there is no unit redundancy for the CI852 unit.
Cannot be used in High Integrity Controller.
CI852 has been replaced by the CI860 communication interface. CI852 is only
described for legacy reasons.
It is not possible to change the CI852 unit via hot swap and it is not allowed to
perform an online upgrade of firmware in a system containing CI852.
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Section 2 Installation
3BSE036351-510 A