The I2005S8 is an expander module with 8 digital outputs through relay contacts for the I2004 interface. You can link up to 4 I2005S8 for each I2004, with which you get32 inputs outputs (plus 2 from I2004). Thanks to its optimized design, the I2005S8 units are powered by the control bus connected to the I2004 device. The control of the outputs is done through the I2004 through proprietary protocol Vigiplus, or also through the embedded web of the device. Does not require independent feeding. Led indicators for diagnosis during start-up.