A new free Wiring Guide from Pilz Automation Technology makes it even easier to design and maintain machinery safety-related control circuits that utilise the Pilz PNOZelog range of microprocessor-based safety 'relays'. This family of multi-functional safety circuit monitors covers all safety applications from Category 2 up to and including Category 4 in accordance with BS EN 954-1. All models feature internal microprocessor-based electronic logic, together with fail-safe outputs consisting of electronic semiconductor switching elements with built-in short-circuit protection.
Advantages of the PNOZelog units include compact dimensions, low power consumption, long service life, resistance to vibration, a capability for handling low switching currents and increased diagnostic capabilities. Furthermore, the versatile multi-functionality means that logistic and inventory costs are reduced and product selection is simplified.
The precise functionality of each PNOZelog product is determined by the way it is wired. Pilz has therefore published a Wiring Guide to help designers prepare circuit diagrams, as well as maintenance engineers who are troubleshooting or modifying existing safety-related control circuits.
Application examples are used to demonstrate, for example, how to set the delay time, how to wire a unit for single-channel or dual-channel operation, how to configure an automatic reset or monitored reset, how to use the unit to detect short circuits across the contacts, how to configure a start-up test, how to configure logical AND and NOT functions - and much more besides.
There are over 150 pages in the Wiring Guide, which is available free of charge as a PDF file (2.7MB). For anyone using PNOZelog monitoring units, this guide will prove extremely useful and it will ensure that designers and maintenance engineers get the most out these highly capable safety components.
Please contact Pilz to request a free copy of the Wiring Guide, or visit the website at www.pilzsupport.co.uk