Appendix A Hardware Units CI854 and TP854 – PROFIBUS DP-V1 Interface
3BSE 027 941 R301 165
CI854 and TP854 – PROFIBUS DP-V1 Interface
Key Features
• PROFIBUS DP with redundant line interface (two
DB9 female connector located on the TP854
Baseplate).
• Simple DIN-rail mounting.
• In addition to the cyclic data transfer the CI854
supports acyclic DP-V1 communication and slave
redundancy.
• By using repeaters it is possible to connect a
maximum of 124 nodes to one PROFIBUS DP (32
nodes are permitted on one segment).
• Pre-set, two-letter Alpha code locking device
installed in unit base prevents mounting of
incompatible components.
Description
The CI854 / TP854 is used for connecting to remote I/O.
Via an external gateway on PROFIBUS DP, field
instruments (on PROFIBUS DP) can be connected to AC
800M. The TP854 Baseplate has two female DB9
connectors for connecting PROFIBUS DP with support
of line redundancy. The baseplate has a code lock that
prevents the installation of an incorrect type of unit onto
the TP854 Baseplate.
The CI854 expansion unit contains the CEX-bus logic, the CPU-kernel with
memory, the PROFIBUS interface with line redundancy unit and a DC/DC
converter that supplies the appropriate voltages from the +24V supply, via the CEX-
bus. The PROFIBUS DP must always be terminated at the two outer nodes. ABB
recommends the use of connectors with built-in termination since the fieldbus will
always be terminated, even if fully disconnected from the unit.
F
R
RxA
RxB
CI854
PROFIBUS B
PROFIBUS A
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