The document describes new expansion modules, the MAC00-FS1 and MAC00-FS4, for JVL's integrated MAC motors. The expansion modules allow multi-axis, high-speed control of up to 255 motors over an RS485 bus. They provide fast local scanning of motor position and status values, as well as sending new position data to multiple motors quickly. The modules also enable reading and writing of all motor parameters and using group commands to control several motors simultaneously.