The digital indicators of the PB6 series are triggered via interface and show numerics and signs on a 4-digit or even 6-digit 7-segment display. This display type with serial interface RS232/RS485 is addressable and can be run in a bus system. It supports additionally a SPS-mode, where the data are transferred via a sychronous protocol to the device. Furthermore several displays can be triggered seperately via the select-input.