Advanced Safety Control for Smaller Machines
Safety devices on a semiautomatic tabletop assembly station must be monitored to ensure that they perform reliably and meet required safety standards. Keep reading to learn how an SC10 Series safety controller was able to replace the functionality of three safety relay modules with one compact, cost-effective device offering intuitive operation and advanced capabilities.
A manufacturer of electronic components uses semiautomatic tabletop assembly stations in the production of their products. To protect operators from the hazardous motion of the equipment, each assembly station has an SLC4 safety light curtain at the part feed, a heavy-duty safety door with a SI-MAG non-contact safety switch at the service access, and a 30 mm E-Stop button at the front of the machine. On smaller machines like these, single-function safety relay modules are often used as an interface between the safety devices and the machine, providing safe stop and start functions.
To simplify and enhance safety control, an SC10 Series safety controller was installed in the cabinet of each tabletop assembly station. The SC10 consolidates the functionality of multiple safety relay modules into one compact and cost-effective device, eliminating the need for a dedicated-function safety relay module for each safety device. This simplifies the wiring of each machine and creates space on the DIN rail.
This PC-configurable safety controller utilizes a feature-rich software with an icon-based, drag-and-drop user interface that makes it easy to add and connect devices. As devices are added, deleted, or edited, the software automatically provides the optimum terminal assignment to minimize wiring and maximize terminal utilization. The Automatic Terminal Optimization (ATO) feature can be used to expand the number of available inputs from 10 to 14 to accommodate additional devices. Each change to the configuration is graphically displayed in the wiring diagram, with terminal assignments clearly identified, making it easy to connect the devices.
Once the configuration has been tested and confirmed, the files can be saved to an SC-XM3 external drive. The configuration, network settings, and passwords can then be loaded onto additional SC10s by simply inserting the SC-XM3 into the micro USB port of each new safety controller.
Industrial Ethernet communication protocols provide two-way communication between the SC10 and other devices, enabling advanced diagnostic capabilities so that issues can be identified and resolved quickly, minimizing machine downtime. Each device can be configured for up to 256 virtual non-safe status outputs and 80 virtual non-safe inputs. This makes it possible to connect additional non-safety output devices like a PLC or indicator light as well as input devices like a manual reset or muting sensors without using IO terminals on the safety controller.