S800 IO Communication Modules CI801
What is the Differenece between CI801 Profibus Communication Interface and CI810.
and can we use CI810 in place of CI801
As I understand things based on my work with the products and in review of the ABB documentation, the two modules are not directly interchangeable.
The CI801, as you stated, is a Profibus Communication Interface unit that allows the 800xA controllers, like the AC800M model PM866 controller, to bring in I/O signals from the S800 I/O over a PROFIBUS DP link via the CI854 Profibus DP Communication Interface, which resides on the controller’s CEX bus.
The CI810 on the other hand is an AF100 (Advant Field Bus) communication module that allows the user to bring in I/O signals from the S800 I/O in to Advant OCS AC400 series controllers like the AC450. Alternatively, if you had an AC400 controller in the field connected to S800 I/O via the CI810 and you wanted to replace it with an AC800M controller you could use the CI896 AF100 Communication Interface unit that sits on the CEX bus of the AC800M controllers in conjunction with the CI810 module.
So, although they may be functionally equivalent in that they are both used to bring information in from S800 I/O modules in to ABB controllers they are not interchangeable as they serve different roles speak different protocols and one is not a replacement for the other. In short, if you have a CI801 connected to a CI854 you cannot replace it with a CI810 and the same is true if you have a CI810 connected to a CI896 Module you cannot simply replace it with a CI810. Also, if you were doing a new installation, you would definitely want to use the CI854/CI810 with S800 over the CI896/CI810 because the CI854/CI801 talks Profibus DP at up to 12 Mb where the CI896/CI810 only communicates at up to 500 Kbit/s
Attached is the AF100 users guide, which may provide you some additional information on the AF100 Bus and the CI810. Also attached is the data sheet with the controller communication modules on it.
CI801 is for S800L IO Light. This is a cheaper version of S800 IO modules without separate MTU bases. If a module fails you have to break the module bus cluster and replace the entire IO unit.
CI810 is for S800 on a different fieldbus system (AF100). As already answered, this is for advant controllers.
CI830 is for S800 on Profibus
CI840 is the redundant version of CI830