... NS-M400 NS-E400Communication RS232 / RS485TCP/IP 10M/100M adaptive RS232 / RS485TCP/IP 10M/100M adaptive RS232 / RS485TCP/IP ... 100m (suggestion distance 80m) Max Distance between Controllers RS232: Communication Distance less than 13m, suggestion distance is ... coverage area Collocations PCB board, case, power, power line, serial port communication line, software, manual, certificate, key(2pcs), carton ...