Product Description:

The AKT-SM-L50-000 is a stepper motor control terminal produced by Kollmorgen for the AKT IO Terminals series. It forms part of the Advanced Kollmorgen Terminal range and mounts on a 35 mm DIN rail beside other I/O slices. By integrating a micro-stepping power stage, digital inputs, and feedback channels, the unit drives a single two-phase stepper motor while exchanging process data with a higher-level PLC. This arrangement supports decentralized motion tasks such as small pick-and-place axes, labeling heads, or format adjustment stations.

Two independent output stages supply up to 2 x 3.5 A continuously and tolerate surges of 2 x 5 A for dynamic acceleration. Command signals originate from a 24-bit process image and are synchronized with the fieldbus, while the digital input block accepts a control voltage of 24 V DC. Pulse timing allows very fine resolution because the terminal can generate a position clock of 400,000 increments/s. When used in full-step mode, it sustains up to 125,000 steps/s. These limits set the top translational speed the connected mechanics can reach without loss of position and also determine how quickly the master controller must supply motion commands.

The terminal supports 64-fold micro-stepping, which improves low-speed smoothness by subdividing each full step into smaller angular increments. It also provides 4 encoder feedback inputs for incremental or SSI encoders with an excitation current of 5 mA. The on-board filter of 0.2 ms debounces limit and reference switches, two of which are provided for homing or over-travel detection. The terminal supports operation at up to 95% relative humidity without condensation and has a protection class of IP 20. The housing clips onto the 35 mm rail and communicates eight digital bits plus two 16-bit words to the controller.