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Safety switch

€4,90 EUR
€4,90 EUR
Sale Sold out
Description

The FB_SafetySwitch function block implements a standards-based safety shutdown according to EN ISO 13849. It checks the status of a safety door ( #SafetyDoor ) and enables operation only when the door is closed via a normally closed contact ( #NO_13_14 ). When the door is open, the normally open contact ( #NC_21_22 ) is set, signaling safe shutdown. Virtual inputs ( #Input_13 , #Input_21 ) serve as enable signals for contact formation.

Note: This logic is provided as a template. Before productive use, it must be integrated into the target environment, validated, and released by qualified personnel. Incorrect integration may compromise security features.

How it works
Disabled

If #Enable is not set, all outputs are set to a safe state (both contacts inactive). No error is reported; the status shows "disabled."

Security logic

The logic reacts to the door status:

  • If the door is closed ( #SafetyDoor = TRUE ), operation is enabled via the normally closed contact ( #NO_13_14 ) when #Input_13 is set. The normally open contact ( #NC_21_22 ) remains inactive.
  • If the door is open, the safety shutdown is activated: The normally closed contact remains reset, the normally closed contact ( #NC_21_22 ) is set when #Input_21 is set, and the error and a corresponding status code are output.
Technical details
  • Inputs: #Enable , #SafetyDoor , #Input_13 , #Input_21
  • Outputs: #NO_13_14 (NC contact: release when door is closed), #NC_21_22 (NO contact: safety shutdown when door is open)
  • Status & Diagnostics: #Error , #Status (0=OK, 1=Door open, 2=Disabled), #DiagnosticCode (e.g. 100 if the safety circuit is interrupted)
  • Logic: Door monitoring with standard-compliant shutdown and release mapping
  • Modes: Active, deactivated, safety shutdown
Possible applications
  • Securing machines with protective doors (e.g. maintenance hatches, housing openings)
  • Integration into safety-related control systems according to EN ISO 13849
  • Feedback of the safe operating state via opener/closer
  • Testing and validation through virtual inputs before physical installation

Note: Safety-relevant validation and approval by qualified personnel is required before productive use.

compatibility
  • Can be used in PLC environments with SCL (e.g. Siemens TIA Portal)
  • Integration into safety-related control systems possible
  • Safe basic state when deactivated
  • Virtual contact release for commissioning and testing purposes
Scope of delivery

You will receive:

  • SCL file with implemented function block FB_SafetySwitch
  • Documented inputs and outputs as well as states
  • Commented logic for adaptation
  • Instructions for integration into existing security architectures

The download link will be provided after purchase.

Support

I support you with:

  • Adaptation of security logic and door monitoring
  • Integration into higher-level safety controls
  • Validation and testing without real door contact
  • Extensions for specific risk analyses

Contact is possible via shop message or email. Individual adjustments are available as optional customizations.