SecurityBridge from PILZ

PILZ SecurityBridge

Protect virtual access to your machine as well!

With SecurityBridge PILZ offers a product for the industrial security sector. The PILZ SecurityBridge protects the configurable safe small controllers PNOZmulti 2 and the automation system PSS 4000 from manipulation due to unauthorized access. That way you don’t even give espionage and manipulation a chance, but guarantee the safety of your staff and the availability of your machine!

Physical access to machinery is clearly defined in the Machinery Safety Directive. For example, a safeguard on a gate ensures that a person cannot move within the danger zone until the machine is in a safe state. The firewall SecurityBridge makes sure that on-site operation is not disturbed by access via the network and that only authorized persons have access to the plant via the network. As a firewall it monitors communication with the controller and controls the data flow. You can also use SecurityBridge to store user rights; these define which staff members may access which data.

For example, if a safety gate is open, SecurityBridge prevents access to the plant via the network. So SecurityBridge combines the benefits of a firewall with extensive knowledge of the product to be protected. As a result, your plant’s IT system is thoroughly protected.

This is how to use PILZ SecurityBridge


SecurityBridge can be connected upstream of the PNOZmulti base unit or PLC controller PSSuniversal PLC. It acts as a VPN server, through which it is possible to establish a virtual private network (VPN) to one or more client PCs (configuration PC). The connection between PC and device is therefore protected. Only users with the relevant permission can make changes to a project’s configuration. This prevents unauthorized access to the secured network. As a result, data transfer between the client PC and PILZ SecurityBridge is protected against tapping and manipulation.

The PILZ SecurityBridge also controls the process data traffic and monitors the integrity of the safety system. Changes in the check sum indicate that there are changes in the PNOZmulti and PSS 4000 projects.

Benefits at a glance:

SecurityBridge PILZ


  • > Protects against data manipulation through authentication and permission management.
  • > Increases the availability of the plant because only the necessary data (authorized configuration and process data) is transferred.
  • > Forwards process data with a low latency.
  • > Detects unauthorized changes to the project by monitoring the check sum (CRC).
  • > Prevents unauthorized access because downstream devices are in a secured network.
  • > Configuration changes to a project can only be performed by users who have the relevant permission.

Technical features:

  • <> Web-based user interface for easy configuration, diagnostics and maintenance.
  • <> Connection to the central authentication system via RADIUS.
  • <> Continuous updates, independently of the control system.
  • <> Integral digital inputs and outputs to activate the VPN tunnel, for example.
  • <> VPN server for building a VPN tunnel for safe transfer of data.
  • <> USB interface for saving and restoring the configuration on a USB memory.
  • <> LED display for error messages and diagnostics.