The IA-3133L-U is a USB 32 Relayd dual pole multiplexer board with 2 out of 64 selection ability, in 32 sates. On board firmware ensures a single relay activation in a `break before make` sequence. The IA-3133L-U is both powered and controlled by its USB port, with an on board watchdog secured operation. The IA-3133L-U is Series-3000 compatible, with the same software support including easy operation utilities and open source samples.