The HY-TTC 37XH is an I/O extension board for the off-highway market. The HY-TTC 37XH is capable of controlling resistive power loads with up to 90 A total switch current and is typically used for controlling vehicle lights. It comes without a housing as it is usually built directly into the cabin.

It is a slave module that communicates with the master (e.g. a TTControl ECU) over CAN using the J1939 standard.

TTControl Hardware Flyer