BL67 electronic module. 4 Digital Inputs, PNP. Ident. no.: 6827171. Independent of the fieldbus and connection technology used. Protection class IP67. LEDs indicate status and diagnostic. Electronics galvanically separated from the field level via optocouplers. 4 digital inputs, 24 VDC. PNP switching. From version VN 01-03 and higher, the module supports accelerated start-up for applications with Fast Start-Up (FSU) and QuickConnect (QC).