The PU 104 is apart of the series of P-open and gives compact PLC functions for automation applications that need distributed intelligence. It also modifies CAN with Ethernet, it is able Ethernet PCs directly to access CAN field busses, even no additional CAN interface. The unit features 16 digital I/O, and 16 on-board digital inputs which can be built individually as inputs or outputs as apart from real-time processing. CAN, CAN master or Slave implementation, plus a CANopen master is fitting in PU 104 of intelligent PLC module, which implement as a library for IEC 1131 and ’C’ for programming and communication functions. The dimension of PU 104 is 124 x 170 x 85.5 mm, ideally the PU 104 is suitable for mounting close to the process in de-centralized systems.
The extensions of system are implemented easily by contacting additional modules I/O to the PU 104. The connections are created with cables which plug into the extension bus module. The system of complete PLC result is connected via the CANbus.
Selective I/O energization
The inputs/outputs supply is supplied via 2 terminals at the signal level. The supply voltage is 24 VDC. The signal I/O’s can be grouped into six groups, each with its own supply.
Convenient field connections
The process or machine electrical wiring is directly connected to the terminal strips at the modules of top and bottom. The type of strips terminals are plug-in type, it is provide system pre-wiring as well as high speed module exchange. Below, the terminal strips alternatives are available as following for:
• Screw terminals
• Screwless spring-clamp terminals
• Crimp terminals.
The three wires principle is connecting the inputs/outputs. The LEDs of front panel is signing the status signal of every I/O, and the module’s operational status. The positions of LED are associated directly with an I/O corresponding.