The X-PLUS S4.1 series stepper motor driver is the more powerful representative of the X-PLUS series, which has an integrated safety function for safe shutdown of the stepper motor, STO (SIL3). STO (Safe Torque Off) switches off your engine current without interrupting the current of the drive. Use the STO both to stop the engine in an emergency and to prevent it from starting unexpectedly. STO saves costs for components and space, as you do not need additional interrupts between the motor driver and the motor when the safety function is activated.
The remaining features and applications of this driver, as well as its compatibility with stepper motors, equal the ones of the X-PLUS B4.1 driver.