The R.STAHL 9170/21-12-21s switching repeater 203281 is used to operate contactors, NAMUR proximity switches, and optocouplers.
The series offers models with one or two channels. The intrinsically safe digital input is always galvanically separated from the output and auxiliary power. The channels in two-channel devices are also galvanically separated. Certain variants can transmit frequencies up to 10 kHz, and the output signal can be inverted.
It safely and reliably transmits signals in hazardous areas, providing a stable solution for signal repeating in industrial environments and ensuring normal system operation.