The eight module expansion slots are directed to four connectors in front of the controller. Connector A,B,D and E. If a module is plugged into a specific expansion slot, one half of the corresponding connector is used to interface this module. The picture below gives an overview of the connectors with their related module expansion slots.
Connector C ( in the middle) is used for controller supply and some optional CAN bus connections.
The picture below shows the connector pinning from the Input Module. Be aware of the different pinouts when the module is plugged into even or odd module slots.
For example let’s assume an Input Module is plugged into expansion slot 5:
- The corresponding connector is D
- The 5V sensor supply pins are: 5-6-7
- The sensor ground pins are: 24-25-26
- The signal input pins are: 13-19-12-18-11-17