Yottacontrol A-3016 Wireless Radio Remote Module Build-in PLC program edit function, can isolate operate without PLC Set all your control demand to meet different application Build-in RS-485 port, easy to communicate to PLC/SCADA/HMI We also offer plenty PLC, IO modules, Timer/Counter/Tachometer www.yottacontrol.com service@yottacontrol.com