SB System Box Units

SB System Box Units are compact modular enclosures used in Rexroth Tightening System 300 installations to house tightening-system electronics. The series supports both single-channel and multi-channel tightening configurations. The SB301 is designed for one tightening channel, while the SB305 can support up to five channels, making the platform suitable for smaller systems that do not require a full card-rack arrangement. Each system box uses a plug-in module design, allowing controller hardware, power electronics, and communication components to be installed as standardized modules. This construction supports easier assembly, service, and expansion within the tightening system architecture. SB units operate as part of a larger modular platform that can scale up to 40 tightening channels when coordinated through communication units and PC-based operating software. Overall, the SB series is intended for fastening applications that need compact enclosure-based electronics, flexible channel configuration, and integration with the Rexroth System 300 control environment.