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Quick Start Guide Introduction The SDC-650 is a multiple door controller that can control up to 8 doors. It has five relay outputs and eight inputs. Up to 16 SDC controllers can be linked using a protected RS-485 network. The PC can connect to it using either RS-232 or the built-in Ethernet connector or through the RS-485 network from another controller.
Step 2: Set the address using the configuration menu The SDC-650 communicates with other controllers via a multi-drop RS-485 communications network. Each controller on this network requires a unique address for communications and identification.