understanding
CLN | ISSUE 18
machine safety
schmersal
serial diagnostics
Anthony Zahra
I
n a traditional safety system, a faulty device or sensor can lead to significant loss of production. Schmersal’s Serial Diagnostic (SD) technology was designed minimise such downtime while also decreasing installation costs. SD capable sensors and interlocks can be connected in series which saves on physical wiring and labour costs while adding comprehensive status and diagnostics data, making finding faults faster. The data from both electronic safety sensors and interlocks with SD interface can be processed by a Schmersal PROTECT PSC1 safety controller or made available
to a supervisory system via one of its many industrial safety busses such as ProfiNet, EthernetIP, Modbus, EtherCat, ProfiBus & CANopen. SD systems are also able to achieve the highest Performance Level, PLe. Mixed installation of electronic safety sensors and interlocks to form a safety function can be realised easily in the field with the SD interface. The actuating and diagnostics data are transferred in the SD interface, which are connected in series via one wire between the SD gateway and the SD slave. Communication with up to 31 slaves per SD gateway
| SAFETY
is possible. These can also be divided into several different safety functions as required. Devices can be installed via SD Junction boxes, Passive Field Box (PFB) or Passive Distribution Module (PDM). The installation system with SD junction box enables quick wiring between safety switchgear devices. The cables with M12 connectors are routed directly from one safety switchgear device to the next and can be routed in the cable channel with SD junction boxes.
The passive field box PFB allows switchgear devices to be connected to a central point in the field. The passive distribution module allows the safety switchgear devices to be wired into a single switch cabinet via spring cage clamps.
PSC1 with integrated SD gateway Anthony Zahra
APPLICATION ENGINEER TÜV Nord, CSME, FS ENG (TÜV RHEINLAND, #3296/11, SIS)
SAFETY CONTROLLER
PSC1 series
The ‘PROTECT PSC1’ is a programmable compact safety controller that can support up to 272 I/O points, monitor 12 axis systems and features enough memory for up to 3000 instructions. It’s suitable for small basic functionality machines right through to large complex machines. The compact controllers support communication protocols like ProfiNet, EtherCAT and EtherNet IP. The PSC1 boasts an intuitive easy to use function block diagram programming environment which automatically generates a wiring diagram for all the devices connected to it to dramatically reduce engineering time.
SAFETY SENSOR RSS260 Series
SAFETY INTERLOCK AZM400 Series
Designed for safety circuit monitoring, the RSS260 series is a non-contact RFID safety sensor for hinged, sliding or removable guards. It uses specifically coded, passive RFID tags in the actuator for enhanced tamper resistance, and longer life. The sensor tolerates misalignments up to 10mm, and accepts two approach directions when mounting. In addition to LED error indication and serial diagnostics for use in various networks, you’ll be able to connect up to 31 safety devices in series without loss of signal or safety level with a Schmersal safety controller.
Featuring a motorised bolt lock and integrated RFID electronic safety sensor, the AZM400 is designed for machines and work cells in hazardous areas. The bolt lock secures the machine guard until dangerous conditions, which may exist immediately after removal of power has abated. The RFID sensor and motor drive locking bolt is contained within the main switch body, which fits into a hole in the actuator block with the matching RFID target. Once locked, the solenoid bolt provides a holding force of 10,000N making it suitable for heavy doors.
product brief
With over 20 years of experience in various areas in safety, electrical and automation, Application Engineer Anthony Zahra holds a TUV certification, as well as training several courses at Control Logic that include Emerson, Red Lion and others. Book an appointment with Anthony or one of our other accredited TUV engineers by calling Control Logic on 1800 557 705.
SAFETY SENSOR RSS16 Series The housing will appear familiar to the users of electromagnetic safety switches because it has the same dimensions as the AZ16 safety switch which is being used considerably in many industries around the world and is heralded to be “the” safety switch. The difference to the AZ16 is that the RSS16 does not have a mechancial actuator. The identification of the target is contactless using RFID technology thereby impossible to defeat, lasting much longer with no contacting parts.
now available from Control Logic
1800 557 705 or email sales@controllogic.com.au 19
