Product Description:

The 7BP702.0 base frame is produced by B & R Automation for the System 2003 Controllers series. It serves as a mechanical carrier that holds logic and I/O modules so they can share common backplane power and signaling on a single DIN rail. In distributed control panels, this part provides a fixed physical platform that organizes controller hardware and establishes consistent spacing for airflow and wiring. It also helps keep installed modules aligned so adjacent components can be mounted neatly inside compact control cabinets.

Its enclosure width measures 161.5 mm, while the depth is only 23 mm, so multiple carriers can be lined up in shallow control boxes without interfering with panel doors or nearby components. This compact footprint is useful when drives, relays, and power supplies compete for limited enclosure space. The overall height of 115 mm sets the vertical clearance required above the DIN rail and matches other System 2003 elements for uniform stacking. The base frame provides 2 module slots, allowing a CPU slice and one expansion unit to be mounted before another carrier is required. Construction from aluminum keeps weight low and improves heat dissipation compared with plastic bases, which helps limit temperature rise during continuous operation.

The frame secures each electronics slice against the left and right side sections by means of a threaded strip in the profile, creating a vibration-resistant interface without additional brackets. Installation takes place on a standard mounting rail, and compatibility with the EN 50022 rail profile allows the unit to mount on existing cabinet hardware. When several bases are installed side by side, an allowance of 8.5 mm is left between carriers to route field wiring and maintain service access. Separate left and right end pieces also make it easier to remove a single module without disturbing the rest of the assembly.