8502-BI-DP Communication module

Under certain conditions, the AC31 adapter I/O modules may be used as spare parts for existing applications where the previous AC31 modules were installed. The AC31 adapter modules can normally replace old modules without any changes in the configuration or application. The new module is configured with DIP switches, the old one removed, the new one installed and the application started again. The modules have the same footprint, cabling position and channel assignment. The AC31 adapter module supports most of the previous functionalities of the old module.

There are only a few exceptions and minor differences that are listed below:

 • The AC31 adapter I/O modules can only be used, supported and tested with ABB AC31 master devices and cannot run with third party controllers. • The AC31 adapter modules are based on standard AC500 I/O modules and on a specific electronic base, the modules cannot be purchased separately and are always delivered as complete devices. The pluggable electronic module cannot be replaced separately without the base. For special applications, further details or specific questions regarding compatibility, please contact your local sales organization.

Difference in feature / feature not supported

Same electrical potential for all channels (no group isolation), input current only max. 2 mA per channel, max. 8 A current sum for all outputs, no local test button, compatible with basic diagnostics only Standard analog voltage or current inputs, PT100/1000 only up to 3-wire connection, no thermocouple support, linear approximation always on, no test button, only standard as in 07AI91.No 16 AI inputs but only 16 AO in 16 AC configuration, no local test button, compatible with basic diagnostics only.Programming using Automation Builder software means that old AC31 user applications must be re-written and direct import of the old program is not possible. Libraries are different and not all features are supported. Only PROFIBUS DP Master is supported. Same footprint and I/O channel position as old AC31 07KT98 CPU.