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ASTTBC RFPT — Fire Alarm Systems (AL) · Question

In a networked fire alarm system, what is the fundamental requirement regarding the failure of a single control unit's microprocessor?

CAN/ULC-S527 (referenced via S524/S537) requires that the failure of one microprocessor in a distributed system shall not interfere with the operation of any ot

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Question: In a networked fire alarm system, what is the fundamental requirement regarding the failure of a single control unit's microprocessor?

Answer options: ✅ A failure in one node shall not prevent the transmission of an alarm from any other node

  • All nodes must shut down safely if one node fails to communicate
  • Networked nodes must use wireless mesh as a primary backbone
  • Nodes must be interconnected via Class A wiring only

Correct answer: A failure in one node shall not prevent the transmission of an alarm from any other node

Explanation: CAN/ULC-S527 (referenced via S524/S537) requires that the failure of one microprocessor in a distributed system shall not interfere with the operation of any other part of the system or prevent an alarm signal from being processed by another control unit.

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