The carrier boards from the SET CAR 500 / 501 series offer slots for four functional/measuring modules from the SET “SMARTbrick” series. The slots supply the modules with power and connect the individual modules with the carrier board’s inter-module bus. The CAR 501 communicates with the superordinate test system via a CAN 2.0B bus at a baud rate of 1MBit. Up to 128 boards can be operated on one CAN bus within one system. These clusters of 128 boards can be cascaded or expanded by extending the CAN bus infrastructure. The mechanical dimensions of the CAR 501 meet the standard European format 100mm x 160mm with a width of 4 TE. The bus address is allocated via two HEX switches on the front plate.