Figure 8-1 shows that the TIOL112 or TIOL112x driver output (CQ) can be used in either push-pull, high-side, or low-side configuration using the enable (EN) and transmit data (TX) input pins. The internal receiver converts the 24-V signal on the CQ line to standard logic levels on the receive data (RX) pin. A simple parallel interface is used to receive/transmit data and status information between the device and the local controller.

These devices have integrated IEC 61000-4-4/5 EFT and surge protection. In addition, tolerance to ±70-V transients enables flexibility to choose from a wider range of TVS diodes if an application requires higher levels of protection. These integrated robustness features will simplify the system level design by reducing external protection circuitry.

TIOL112 or TIOL112x transceivers implement protection features for overcurrent, overvoltage and over-temperature conditions. The devices also provide a current-limit setting of the driver output current using an external resistor.

The devices derive the low-voltage supply from the IO-Link L+ voltage (24 V nominal) via an internal linear regulator to provide power to the local controller and sensor circuitry.