... protection;DIP-chip to ensure more reliable communication, RS485 reverse protection, anti-static protection;Hardware watchdog to ... 50Pin extended interface, to the height of 128 points;RS232 and RS485 communication without the jumper, and also supports GSM / ... 4,1/2, static routingScan interface50PIN interfaceCommunication modeRS232,RS485,100M RJ-45 Port,USBWireless communication Support RF/GPRS ...