Keypad for AC15/AC20/690P/590P with Alpha Numeric Display: Parker SSD Drives 6901 Operator Station (Keypad) with Alpha Numeric 32 Character display for use with AC15, AC20 and 690P AC Frequency Inverters and 590P DC Thyristor Drives. Keypad for AC15/AC20/690P/590P Alpha Numeric Display Parker SSD Drives 6901 Operator Station 32 Character display For use with AC15, AC20, 690P AC Frequency Inverters For use with 590P DC Thyristor Drives 6901-00-G Parker is a versatile item that can be used in various industrial applications. It is a high-quality product that can be purchased at PLC2Day.