PLC is a base specially designed for industrial applications. , DC power supply in 9-24V. Does this PLC remind you of "PLC" in industrial controller, short for "programmable logic controller" This API base is not the typical API used in programmable logic controllers, but it is capable of implementing the most common PLC in the industrial field. Based on the current M5 development system, you can add as many Realys as you want, you can enable TTL-RS485 communication, you can arrange your custom circuit on the protoboard. you can also a LoRa node by stacking a LoRa module, etc. This base gives you unlimited combinations, it's powerful, flexible and covered in an industrial grade casing. If you happen to work in an industrial field, we especially recommend this PLC base which will surely give you the fastest and to solve your problem. The current sensor (ACS712TELC-05B) is also integrated with the RS485 adapter board for current monitoring. Colour:gray Material:Plastic + Metal Size:54 x 22mm Package Contents: 1 * PLC- board 1 * RS485 module 1 * Plastic case 1 * Guide rail fixings 1 * rail 1 * Magnet 1 * 6Pin terminal 1 * 4Pin terminal 3 * hexagon wrench 7 * Screw (three types) 10 * Cold Press Terminal 1 * sticker Note: When using the CORE2 or CORE2-FOR- master control driver module, please use the DC power input of OBase, and set the power mode to input mode (refer to the code ), otherwise it will not be to start normally // Mbus_mode_t: //Kmbusmodeoutput: Use usb or battery//Kmbusmodeinput: use external 5v power supply, or dcM5 interface. Start(True,True,True,False, KMBusModeInput); If you need to increase the RS485 interface, solder the RS485 board to the pins of the mian board, and the serial port pins on the RS485 board will be connected to the gpio16 and gpio17 of the PLC backplane. Support 9-24v voltage input Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.