AS-Interface cabling system - Schneider Electric

Presentation (continued) 0AS-Interfacecabling system 0AS-Interface components (continued)The AS-Interface power supplyProvides a PELV (Protective Extra Low Voltage) of 29.5 to 31.6 V for the interfacesand components supplied from the AS-Interface line. It ensures disconnection ofcommunication data. It is protected against overload and short-circuits. Only thistype of power supply unit can be connected to the AS-Interface line. Since thecurrent in the AS-Interface cable is limited, it is sometimes necessary to supplycertain circuits, in particular the actuators, directly or via the interface outputs, witha separate, standard c 24 V supply unit. In this case, a dual supply can be used:AS-Interface and c 24 V.The ribbon cableThe yellow cable, connected to the AS-interface power supply, performs both ofthe following functions:b Transmission of data between the master, the dedicated components, theinterfaces and the safety products (slaves).b Supply of power to the sensors.The black cable, connected to the c 24 V auxiliary power supply, provides powersupply for the actuators, but also, on certain interfaces and components, for thesensors (isolated inputs).The mechanical profile of these cables makes it impossible to reverse the polarity.The material used also allows fast and reliable connection of the variouscomponents, interfaces and accessories by means of insulation displacementconnectors (IDC). When products are removed - for example when wiring needs tobe modified - the cable resumes its original form due to its self-sealing sheath.These cables can be used both in an enclosure and on the machine. The maximumoperational current is 8 A.The ribbon cables are available in 2 types of material:b Rubber, for standard applications and maximum cable flexibility.b TPE, for applications where the cable is installed in an environment with splashingoil.Ribbon cable withmechanical profileIDC connector6