E860-DTU(2020-400SL)A Switching Signal relay module wireless transmission remote control remote synchronous transmission acquisition feedback [Communication interface]:RS485 [Transmission distance]:10km [Working voltage]: AC 85~265V [Installation method]:guide rail installation [Product size]: 108*87.5*65mm [Product weight]:194g±5g [Introduction]:E860-DTU(2020-400SL)A...