Siemens 6RY1703-0DA02 Power Interface Board & Terminals, also cataloged as C98043-A7002-L4, is the four-quadrant Power Interface for SIMOREG DC-MASTER 6RA70 drives. It is specified for 85–575 VAC (All 4Q ratings) and ships with terminals included for straightforward wiring. It occupies the hardware layer between the CUD1 control board and the drive's thyristor power section, translating digital control commands into gate pulses while monitoring key power-conversion signals. Made in Romania, this power interface supports industrial DC motor applications that require four-quadrant operation.
