The Feryster DTSN-28/3.3/12-P is an input/output (I/O) relay module. It is a single-pole, double-throw (SPDT) relay with a coil voltage of 3.3 volts DC and a contact rating of 12 watts. The module is designed to be used with Feryster's range of programmable logic controllers (PLC). It is ideal for controlling larger loads such as motors, pumps, valves, garage doors, roller doors, and other types of Industrial automation equipment. The DTSN- 28/3.3/12-P offers a wide variety of features including multiple contact configurations, overcurrent and short circuit protection, surge and transients protection, mechanical and electrical functionality, as well as durability and reliability.