How many active DACRs are allowed per one spare DACR?

The correct answer indicates that for every one spare Dual Addressable Control Relay (DACR), a maximum of five active DACRs is permitted. This ratio is significant because it helps in managing the capacity and performance of alarm systems efficiently.

Having a designated number of active DACRs in relation to spare units ensures that the system remains operational even in the event of a failure. This configuration is vital for maintaining system integrity and reliability, especially in safety-critical applications such as alarm and security systems.

By allowing a maximum of five active DACRs per spare, this regulation ensures that the system can maintain functionality and responsiveness without becoming overloaded. This structure not only aids in resource management but also aligns with best practices for system design and redundancy planning in alarm system management. Understanding this ratio is essential for alarm contractors when designing systems that require a balance between responsiveness and reliability.