Compact safety relays PNOZsigma

Using operating mode selector switches you can set your PNOZsigma unit to suit your own process and safety requirements:

• Selectable reset modes: manual, automatic, monitored, with start-up testing
• Selectable operating mode: With or without detection of shorts across contacts
• Selectable time delays between 0 ... 300 seconds
• Selectable timer functions: delay-on energisation, delay-on de-energisation, pulsing

Multifunctionality compressed into minimum space: PNOZsigma units are up to 50% narrower than standard safety relays - saving you space in the control cabinet and also reducing costs.

Each PNOZsigma unit has 6 descriptive LEDs to display switch and fault conditions: Power, In1, In2, Out, Reset, Fault. So diagnostics are available quickly when servicing and there's no need to connect external measuring devices.

Jumpers can be used to connect contact expander modules to the respective base unit. There's no wiring involved whatsoever!

PNOZsigma units are available with proven, screwless spring-loaded terminals as well as screw terminals. These ensure that the wiring work is completed quickly and that the wires are held securely via the cage clamp.

A special feature of the PNOZsigma is the new spring-loaded technology for opening specific terminal chambers: each terminal point - in other words each input or output - has two terminal chambers, which on the PNOZsigma can either be opened together or separately. So a fitter can specifically remove the relevant wire individually, without pulling out any of the other wires unintentionally.

The PNOZsigma housing is simply clipped on or off using spring clips - there's no need for tools. So top-hat rail assembly is particularly quick and easy.

The layout of the functions and operator elements on each PNOZsigma is standardised. The terminals are labelled and positioned identically. So connections and devices can always be assigned quickly for configuration, installation and diagnostics.  

To protect against manipulation and contamination, all the setting elements are protected by a cover flap, which can also be sealed if necessary.