The 16R+PSU adds 16 additional relay outputs to your system (NO or NC) and comes with an integrated intelligent power supply. The LED adjacent to the relay location indicates whether the relay has been activated for testing purposes. When the output module is connected to an intelligent power source, all connections will draw power from the power supply and use the system's diagnostic capabilities to control the power supply. Connected directly to BUS RS-485. Dimensions: 390 x 305 x 100 mm. Grade 3.