The 3RK1304-5KS40-5AA3 is a SIMATIC-branded reversing motor starter — a single enclosure that handles forward/reverse motor control in one package. Control voltage is 24 V DC nominal, with a permissible range of 20.4 to 28.8 V DC. The unit draws its power from a socket conforming to ISO 23570 for the main energy infeed, which standardizes the connector interface across this starter family.
Fieldbus and I/O
This reversing starter supports both PROFINET and PROFIBUS DP protocols, so it drops into either a Siemens S7 control architecture or a mixed-vendor network with a gateway. The digital I/O is handled through M12 sockets — 2 bytes of inputs and 2 bytes of outputs, which is enough for basic status feedback and control interlocks without a separate remote I/O block.
Mounts via screw fixing in either vertical or horizontal orientation, which gives flexibility when fitting into tight machine frames. The enclosure measures 230 mm high, 110 mm wide, and 150 mm deep — that's another SKU I don't need to worry about panel space for, since it's self-contained. It handles 15g shock at 11 ms and 2g continuous vibration, so it's built for the shock and vibe you see on press lines, conveyors, and packaging machinery.