HONEYWELL FTA-T-21是一款PLC自动化备件，具有降低面板能耗、低保持交流和直流线圈能耗、内置浪涌保护等特点。同时，它还具有Z接触器，可以承受控制电压短下降，并可根据SEMI F47-0706标准使用额外的AF Z线圈进行优化配置。

It is a PLC automation spare part with features such as reduced panel energy consumption, low maintenance of AC and DC coil energy consumption, and built-in surge protection. At the same time, it also has a Z contactor that can withstand short drops in control voltage, and can be optimized using additional AF Z coils according to SEMI F47-0706 standards.