- Integrated wide-range power supply for the sensor supply - Particularly space-saving design - Plug-in screw terminals simplify installation - With PNP or NPN control - One- or two-channel design The transistor outputs of conventional sensors are designed for small load currents. If the user wants to switch higher currents or even alternating currents, he must use a switching amplifier. It uses the sensor signal to control an output relay. ifm offers switching amplifiers in one and two-channel design. They have an integrated wide-range power supply (110...240 V AC) to supply the connected sensors with voltage (24 V DC). Thanks to their slim design, the switching amplifiers take up very little space in the control cabinet.