• Es ist ein FB Baustein aus Tia Portal "FI Schutzschalter" es wird ein echter FI Schutzschalter damit Simuliert es soll als Box oder CD hülle ähnlichem dargestellt da es nur als Download ja verfügbar ist Siemens LOGO Schrift weglassen gerne auf englich
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residual current circuit breaker

€6,90 EUR
€6,90 EUR
Sale Sold out
Description

The FB_FI_Schutz function block represents the core logic of a residual current device (RCD). It measures the differential current ( #DiffCurrent ) and compares it to an adjustable trip threshold ( #IDelta ). If this threshold is exceeded, a trip ( #tripped ) is triggered and signaled via the contacts: the normally closed contact ( #NO_14 ) opens, the normally open contact ( #NC_22 ) closes. A simulation mode allows testing without a real protection requirement; resetting is performed via #Reset .

Note: This logic is intended as a template. Before productive use, it must be integrated into the target system, tested, and approved by qualified personnel. Improper use may result in incorrect triggering or ineffective protection.

How it works
Reset

#Reset resets the internal trip state ( #tripped ) so that the circuit breaker is ready again.

Disabled

If #Enable is not set, both outputs remain inactive. No errors are reported; the status indicates deactivation.

simulation

In simulation mode, tripping is determined directly by comparing the absolute differential current with the threshold. The outputs follow the state: #NO_14 indicates non-tripped (normally closed contact), #NC_22 indicates tripped (normally open contact).

Real operation

In real-time operation, the trigger state is set and maintained when the threshold ( ABS(#DiffCurrent) ≥ #IDelta ) is exceeded. The contacts only transmit the state if the corresponding input signals are active:

  • #NO_14 (normally closed) is active if #Input_13 is set and there is no trigger.
  • #NC_22 (normally open) is active when #Input_21 is set and triggered.
Technical details
  • Inputs: #Enable , #Reset , #SimMode , #DiffCurrent , #IDelta , #Input_13 , #Input_21
  • Internal state: #tripped – held trip
  • Outputs: #NO_14 (normally closed), #NC_22 (normally open)
  • Status & Diagnosis: #Error , #Status , #DiagnosticCode
  • Modes: Reset, Disabled, Simulation, Real-time
  • Logic: Tripping when residual current is exceeded with self-maintaining and conditional contact release
Possible applications
  • Installation in protection and monitoring systems for fault current detection
  • Simulation of tripping behavior without real current load for validation
  • Linking to further control or alarm chains
  • Clear feedback of the trigger state via NO/NC contacts

Note: A complete technical inspection and approval by qualified personnel is required before productive use.

compatibility
  • Can be used in PLC systems with SCL support (e.g. Siemens TIA Portal)
  • Modular integration into protection, process and diagnostic architectures
  • Simulation mode allows safe pre-tests
  • Safe fallback in deactivated state
Scope of delivery

You will receive:

  • An SCL file with implemented function module FB_FI_Schutz
  • Complete declaration of all inputs and outputs as well as internal states
  • Commented logic for quick adaptation
  • Short guide for integration into control projects

The download link will be provided after purchase.

Support

I am happy to support you with:

  • Adjustment of the trigger threshold and sensitivity
  • Integration into higher-level protection and control systems
  • Validation in simulation mode before real operation
  • Analysis of trigger events and individual extensions

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