Present embodiments include an automation control system that includes an input/output device module with a device bus therein. The input/output module also includes a first bus contact on a first side of the input/output device module and communicatively coupled with a first end of the device bus, and a second bus contact on a second side of the input/output device module and communicatively coupled with a second end of the device bus. The second side generally faces an opposite direction from the first side and the input/output device module is configured to be coupled with additional input/output device modules positioned on the first and second sides of the input/output device module via the first and second bus contacts. Further, the first and second bus contacts are positioned on non-lateral surfaces of the input/output device module, the first and second contacts include spring-loaded connectors, the first and second contacts include two-prong or three-prong forks, or the input/output device module is a terminal block.