Communication Module, RS485, RS485 interface; Current consumption from backplane bus : 150 mA; Power loss : 0.75 W; Status display : yes; Interrupts : no; Process alarm : no; Diagnostic interrupt : no; Diagnostic functions : no; Diagnostics information read-out : possible; Supply voltage display : yes; Group error display : red LED; Channel error display : none; Type of interface : RS485; Connector : Sub-D, 9-pin, female; Electrically isolated : Point-to-point interface : 5V DC Power supply : max. 90mA