ILC 170 ETH 2TX controller features two Ethernet ports, which come with a built-in Ethernet switch to daisy-chain multiple controllers. Optional SD card memory provides program transfer between the controllers. It has an onboard data and program memory (512 KB) and retentive memory (48 KB), eight digital inputs and four digital outputs (500 mA) integrated onboard. The controllers are programmed with PC WorX Express.