Mitsubishi Electric A1SY22 Triac Output Module

The Mitsubishi Electric A1SY22 Triac Output Module is a 16-point AC output card for the MELSEC-A PLC platform, enabling PLC-based control of external devices such as relays, solenoids, and lamps. It provides triac (AC output) with a rated load current of 0.6 A per point, a 100–240 VAC range at 50/60 Hz, and a switching response of approximately 1 ms ON/OFF. The module uses an internal 5 VDC supply from the PLC base, draws about 270 mA on the 5 V bus, and features photoelectric isolation with a 20-point screw terminal block; common terminal current is approximately 2.4–8 A depending on configuration, with a minimum load of AC24V 100 mA (typical) and leakage current OFF of 1.5–3 mA. Operating from 0°C to 55°C (storage -20°C to 75°C), it is rack-mounted on the A-series base unit and is listed as discontinued / legacy; common replacements include Mitsubishi A1SY40 (transistor output), QY22 (Q-series equivalent), and AJ65SBTB1 (remote I/O).