PDK™ RED R4E Expansion Board
PDK RedTM Expander Boards accomplish complete scalability, built to customize the Red Max and accomplish all of your system needs. Every  expander board includes built-in Ethernet connectivity and self-discovery, simplifying ip configuration and functionality. Each expander is equipped with OSDP functionality, an onboard power supply, and a fully-supervised power circuit that monitors input, output, battery voltage, and overall controller  health.