The Pacesetter NEMA 4 Series AC variable frequency drives allow machinery builders to economically add the versatility of adjustable speed, dynamic braking and comprehensive motor protection to their products, which are used in wet or dusty environments. Two models of the ruggedly enclosed inverters cover 115V AC or 230V AC 50/60 Hz inputs with 1/4 hp and 1/2 hp outputs, respectively. Bodine Electric Co.