STMicroelectronics IO-Link Actuator circuit boards provide a one-stop reference design for industrial monitoring and equipment manufacturers

     ST has introduced an IO-Link based industry standard and device alarm actuator reference design, with final delivery in the form of out-of-the-box finished boards and supporting protocol stacks and application software. The STM32G071CB microcontroller runs ST's unique IO-Link demo stack and application software, handles system control and diagnostic tasks, and communicates with transceivers and low-side switches.

     The EVLIOL4LSV1 board uses ST's L6364Q dual-channel IO-Link transceiver to handle communication tasks and controls the indicator light via an IPS4260L smart low-side power switch. The board can be connected directly to a system of indicator lights, such as intelligent warning lights for plant automation, level alarms to indicate surplus or emergency levels, and other system warning devices. The board also provides a quick way for developers to evaluate IPS4260L and L6364Q integrated circuits, and is equipped with a four-pin M12 interface for the IO-LINK master connector and a five-pin SWD connector for burning code.

     The L6364Q transceiver is fully protected and supports standard IO-Link communication rates, including 38.4kbit/s COM2 and 230.4kbit/s COM3. The transceiver operates in single byte or multibyte mode, including 38.4kbit/s com2 and 230.4kbit/s com3. The transceiver operates in single byte or multibyte mode, and can also enter transparent mode, giving control of IO-Link communication to the microcontroller through a simple UART interface. Built-in protection ensures EMC immunity to 2.5kVpk coupled surge pulses /500Ω impedance without additional protection elements.

     The IPS4260L low side driver has four outputs that are used to drive the load connected to the supply voltage at one end, and each output is independently controlled by the digital output signal of the microcontroller. The power supply voltage range of the driver is 8V to 50V, and the current at each output can be set independently in the range of 0.5A to 3.0. A. Each channel integrates independent overload protection and overheat protection functions, and provides open circuit, overload and overheat diagnostic signals to facilitate system management and improve system reliability. The reference design also incorporates ST's SMBJ30CA TVS (Transient Voltage Suppression) diode, which can withstand coupled surge pulses at 2Ω output impedance on the power rail.