Mitsubishi QD51 Description Description Mitsubishi PLC Q Series Serial communication module RS232 2 ports BASIC Related products Mitsubishi FX2N-48ET-ESS/UL MITSUBISHI AJ71E71-S3 Mitsubishi FX2N-32ER-ES/UL MITSUBISHI A1ADP-SP Mitsubishi FX2N-16EX-ES/UL Mitsubishi FX2N-16EYR-ES/UL