SIPLUS S7-1500 TM PosInput 2 based on 6ES7551-1AB01-0AB0 with conformal coating -40...+70 °C . counter and position detection module for RS-422 incremental encoder or SSI absolute encoder, 2 channels, 2 DI, 2 DQ per channel 2 channels, 2 DI, 2 DQ per channel.