Mitsubishi QJ71MB91 Description Description Mitsubishi PLC Q Series Serial Modbus communication module;Master/Slave,RS232,RS422/485port Related products Mitsubishi FX2N-48ER-ES/UL MITSUBISHI A1ADP-SP MITSUBISHI AJ71E71-S3 Mitsubishi FX2N-16EX-ES/UL Mitsubishi FX2N-16EYT-ESS/U Mitsubishi FX2N-48ET-ESS/UL