Description
PROFIBUS DP is a high speed multipurpose bus protocol (up to 12Mbit/s) for interconnecting field devices, like remote I/O, drives, low voltage electrical equipment, and controllers. PROFIBUS DP can be connected to the AC 800M via the CI854A communication interface. The Classic CI854A includes two PROFIBUS ports to realize line redundancy and it also supports PROFIBUS master redundancy. The CI854B is the new PROFIBUS-DP master that replaces CI854A in new installations.
Master redundancy is supported in PROFIBUS-DP communication by using two CI854A communication interface modules. The master redundancy can be combined with CPU redundancy and CEXbus redundancy (BC810). The modules are mounted on a DIN rail and interface directly with the S800 I/O system, and other I/O systems as well, including all PROFIBUS DP/DP-V1 and FOUNDATION Fieldbus proficient systems.
The PROFIBUS DP must be terminated at the two outermost nodes. This is usually done by using connectors with built-in termination. To guarantee a correct working termination the connector has to be plugged and power supplied.
Features and benefits
Used for connecting remote I/O and fieldbus instruments via PROFIBUS DP
Possible to connect PROFIBUS PA to the CI854A/ CI854B via the PROFIBUS linking device LD 800P
The CI854A and newer CI854B can be set redundant
There are three ways to connect modules into a system: CI854A-EA 3BSE030221R2 module
① There is no base plate, which is directly connected by the interface between modules, and then fixed to the corresponding guide rail. The V80 series PLC of Davidson Company has this structure and is relatively compact.
② There is a backplane, and all modules are fixed on the backplane. For example, the PPC11, PPC22 and PPC31 series PLC of Davidson Company, the C200Ha machine of OMRON Company, CV2000 and other medium and large machines are of this structure. It is relatively firm, but the number of slots on the bottom plate is fixed, such as 3, 5, 8, 10 slots, etc. The number of slots is not necessarily equal to the actual number of modules, so it is unavoidable to have empty slots during configuration. This is not only waste, but also takes up more space, and the empty unit has to fill the extra slot.
③ Replace the backplane with a rack, and all modules are fixed on the rack. This structure is more complex than the bottom plate, but more reliable. Some large PLCs use this structure.
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Our warranty: All new or repaired parts have a 12 month warranty period beginning
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