UID1828 with a 8 bit multi-function switch. Dial 1 to dial 7 at power-up, provide the address identification code UID828. Dial 8 in ON (see instructions), CAN bus terminal resistor built-in UID1828 is enabled. The factory, UID1828 address identification code is set to 7, at the same time not enable terminal resistance.Control structure of UID1828 is simple, high fault tolerance. The Enclosure of data acquisition is made of die-cast aluminum to provide a rugged durable protection and improves the heat dissipation.