FB's Series - Digital Input / Output Expansion Unit 24 points 24 VDC digital input, 16 points (RELE) digital outputFBs-40XYR$0,00PrecioCantidad*AgregarVer pedidoFB's PLC CatalogLink Here Download Main unit ManualDownload Main unit Manual - Hardware and Instruction. Click Here Download FREE Programming SoftwareDownload WinProladder. Click Here