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Safety relays PNOZsigma

Maximum functionality in minimum width

Safety relays PNOZsigma

The safety relays PNOZsigma combine many years of experience with today's very latest safety technology. You can achieve maximum safety and cost-effectiveness with minimum effort, thanks to the emergency stop relay.

With particularly narrow housing widths and multifunctionality packed into each unit, the emergency stop relay provides maximum functionality in minimum width. You can thereby implement safety technology faster and with greater flexibility - therefore more efficiently - while also saving space.

Speed monitor PNOZ s30 reloaded – New features in Version 3

We have reworked the speed monitor PNOZ s30 from the product group PNOZsigma. From Version 3.0, the PNOZ s30 has a configurable analogue output, which forwards the safely measured speed to a higher level PLC controller.

Everything about the new features of the speed monitor PNOZ s30

Speed monitor PNOZ s30

Your benefits with the emergency stop relay

  • Emergency stop relay for up to 50 % space saving in the control cabinet
  • Rapid commissioning and expansion
  • High availability and diagnostics in seconds
  • One unit for many safety functions


Features of PNOZsigma
  1. Rapid installation: With push-in spring-loaded terminals
  2. Wiring work is reduced by 20 %: Contact expansion via connectors
  3. Simple configuration: Designation and position of the terminals is the same on all unit types: So connections and devices can always be assigned quickly for configuration, installation and diagnostics
  4. Maximum flexibility: Operating modes and timer functions are selectable
  5. Diagnostics in seconds: Via 6 LED displays – no external measuring devices required
  6. Rapid assembly via spring clips: No need for tools
  7. Safe from manipulation: Setting elements have a lockable cover

Applications of the emergency stop relay

As well as the safe monitoring of E-STOP, safety gates, light barriers, two-hand and time, a range of special applications are also available. Use PNOZsigma for your application, too!

Applications of the emergency stop relay

Convenient speed monitoring – PNOZ s30

As the new Machinery Directive becomes valid, a new requirement in the field of drive monitoring comes to the fore: When the drive is brought to a standstill, the operating status must be safely monitored and maintained.

This requirement is met by the speed monitor PNOZ s30. It provides safe monitoring of standstill, speed and direction of rotation. So the right speed monitoring solution is available for each application.

Convenient speed monitoring – PNOZ s30

Contact expansion module PNOZ s22 – Twice as good

PNOZ s22 provides two relay functions that can be controlled separately in accordance with PL e of EN ISO 13849-1. Each relay function provides 3 N/O/1 N/C contacts. These can be controlled separately, so that the outputs can be assigned different functions, depending on the base unit. Safe separation between the two relay functions enables different potentials to be switched. Multiplication of the relay contacts permits an extended range of functions for applications; this is an interesting feature, especially in connection with the safe speed monitor PNOZ s30.

Safe firing with PNOZ s4.1

Thanks to three safe, diverse safety contacts, the PNOZ s4.1 is approved for use in burner controls. It is approved in accordance with the standard EN 50156-1 for electrical equipment on furnaces, in particular with regard to the requirements for application design and installation.

Safe firing with PNOZ s4.1

Multiple expansion – Contact expansion modules PNOZ s7.1 and PNOZ s7.2

With a base unit and a PNOZ s7.1, the number of safety contacts can be expanded almost without limit. Up to ten PNOZ s7.2 can be connected to a PNOZ s7.1. If you need more contacts, an additional PNOZ s7.1 can be added to the series. No wiring is involved – just a connector and one simple hand movement. At just 17.5 mm wide, the PNOZ s7.1 has three safety contacts, while the PNOZ s7.2 has four safety contacts plus one auxiliary contact. They can be combined with other PNOZsigma expansion units at any time.

Rapid contact expansion – it's easy with PNOZsigma!

Contact expansion module PNOZ s20 with semiconductor outputs

The number of semiconductor outputs can be expanded in conjunction with a base unit, such as the PNOZ s3 for example: If max. ten semiconductor outputs are needed, the contact expansion module PNOZ s20 can be connected directly to a base unit. If more safe semiconductor outputs are needed, the contact expansion module PNOZ s7.1 can be integrated in between. The number of semiconductor outputs can thus be increased almost infinitely.

  • Valves
  • Contactor expansion
  • Use on presses in conjunction with two-hand control and the base unit PNOZ s6, e.g. enable press valve

Our product range: PNOZsigma

To monitor E-STOP, safety gates, light barriers

The safety relays PNOZsigma monitor E-STOP, safety gates or light barriers. One PNOZ safety relay is used per safety function.
Two-hand monitoring

Two-hand monitoring

Safety relays in the PNOZsigma product range for safe monitoring of two-hand pushbuttons. Two versions are available: Type IIIC and Type IIIA in accordance with EN 574.

Speed monitoring

Speed monitor for safe monitoring of standstill, speed, position and speed range. Monitoring of direction of rotation in accordance with EN ISO 13849-1 up to PL e and EN IEC 62061 up to SIL CL 3. Configuration and fault indication may be displayed.

Safety relay PNOZ s50 – Safe brake control

The safety relay PNOZ s50 is suitable for safe brake control and monitoring of holding brakes or safety brakes.

Time monitoring

The safety relay PNOZ s5 has delay-on de-energisation and can be used as a timer. The safety relay PNOZ s9 can be used as a pulsing timer or as a contact expansion module.

Contact expansion modules

Instantaneous contact expansion modules from the PNOZsigma product range, to increase the number of available contacts. These are used as expansion modules for the safety contacts on a base unit. Base units are all safety relays or safety control systems with feedback loop monitoring.


Accessories for the safety relays PNOZsigma, such as terminals, connectors and terminators.


Accessories for the safety relays PNOZsigma, such as terminals, connectors and terminators.


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Pilz GmbH & Co. KG
Felix-Wankel-Straße 2
73760 Ostfildern

Telephone: +49 711 3409-0

Technical Support

Telephone: +49 711 3409 444