The Siemens 505 4908 I Industrial Relay Output Module is a plug-in module for Siemens PLC systems that provides relay-contact outputs. Designed to expand a PLC's control capability, it enables the processor to switch external devices such as motors, solenoids, or signaling equipment through its relay contacts. As part of the 505-series family, it slots into the PLC backplane to extend the controller's output capacity with relay contacts.
