Jan. 16, 2009
GuardPLC from Rockwell Automation offers superior speed in PLC throughput and network functionality, and meets worldwide PLC standards and global standards for functional safety in programmable electronic systems. 

GuardPLC easily integrates into a standard control system. Communication options include GuardPLC Ethernet, EtherNet/IP, DeviceNet Safety, Modbus, Profibus, and ASCII. GuardPLC is used in applications up to EN-954 Category 4 and IEC 61508 SIL 3; they are ideal for sensing speed, direction, zero-speed, temperature, pressure, and flow applications.

GuardPLC is a single wire Ethernet solution, running distributed safety I/O on GuardPLC Ethernet while communicating to standard PLCs and HMIs on EtherNet/IP. Both protocols run simultaneously on the same Ethernet cable. Additionally, GuardPLC can control standard I/O on EtherNet/IP, such as Flex I/O or POINT I/O, meaning increased flexibility for system design.

Adding to network flexibility,  GuardPLC supports DeviceNet Safety via the DeviceNet Safety Scanner module. DeviceNet Safety allows a GuardPLC to control safety DIO on DeviceNet, communicate to PLCs and HMIs, plus control standard I/O devices on DeviceNet, such as stack lights, valves, push button stations, or POINT I/O.

Rockwell Automation offers Certified Function Blocks, application-specific instructions that can be used in a GuardPLC controller's application program. Certified by TÜV, these function blocks make application development, debugging, and trouble shooting quicker and easier. Instructions include E-Stop, light curtain, diverse input, two-hand run station, enable pendant, redundant output, and pulse test output.

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