ASTTBC RFPT — Fire Alarm Systems (AL) · Question
A Class X (DCLX) Data Communication Link has the unique ability to maintain communication during what specific fault?
DCLX is a DCL circuit that can withstand a short circuit because it utilizes isolator modules to keep the rest of the loop running. (S524:19 Cl 3.102).
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Question: A Class X (DCLX) Data Communication Link has the unique ability to maintain communication during what specific fault?
Answer options:
- A ground fault on the loop.
- An open circuit on the loop. ✅ A wire-to-wire short circuit.
- Total power failure.
Correct answer: A wire-to-wire short circuit.
Explanation: DCLX is a DCL circuit that can withstand a short circuit because it utilizes isolator modules to keep the rest of the loop running. (S524:19 Cl 3.102).
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Question explanations
- Which of the following constitutes a system 'deficiency' rather than a 'non-conformance' to current standards?
- When a deficiency is corrected, what specific information MUST be recorded in the log?
- Which of the following would be categorized as a 'Non-Conformance' to the Installation Standard (S524) in an i
- In the event of a deficiency that renders the fire alarm system inoperative, what is the mandatory reporting r
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