SPS NAC Field Wiring Guidelines

Overview

Guidelines

Each of the 3 NACs has two pairs of driven outputs (A+/A-, B+/B-) which operate together.

NAC B outputs have polarity reversal supervision and expect a 10k EOLR. Each connected device must have a suitably rated blocking diode.

NAC A outputs have an integral 10k to accommodate Class A (loop) wiring. Class A wiring is not mandatory under AS1670.1.

The 3A max rating applies to each NAC, B + A outputs combined. NAC load current may be read on the LCD.

The Australian SPS has extra decoupling capacitors fitted to the NAC outputs, and cannot be used to drive the Simplex range of addressable appliances.

NACs may be programmed to be normally on and the terminals used as power supply outputs. See the SPS Auxiliary Power Wiring section following.

Review the following guidelines for NACs before you begin NAC field wiring.

All wiring shall be 0.75 mm2 to 4 mm2.

All wiring is supervised and power-limited.

The maximum alarm current is 3 A per circuit. The supervisory current is 2.03 mA at

24 VDC.

The nominal voltage rating is 24 VDC, 2 V p-p ripple (maximum).

The total available current from the SPS is 9 A. Any current used for card power by modules plugged into the PDI, as well as any auxiliary 24 VDC current, must be deducted from the total 9 A available current.

Terminal designations “+” and “-” are for the alarm state not the supervision state.

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Tyco 4100U installation manual SPS NAC Field Wiring Guidelines

4100U specifications

The Tyco 4100 series, which includes the 4100U, 4120, and 4020 models, represents a significant evolution in fire alarm and detection systems. These systems are designed to meet the needs of commercial, industrial, and institutional environments, ensuring reliable safety and compliance with the latest regulatory standards.

One of the primary features of the Tyco 4100 series is its modular design. This allows for easy expansion and customization to meet diverse application requirements. The systems support a wide range of detectors, initiating devices, and notification appliances, providing flexibility for different building layouts and fire protection needs.

The 4100U model is particularly noted for its powerful processing capabilities, utilizing advanced digital technology to enhance the speed and accuracy of fire detection. It includes sophisticated algorithms that optimize response times and reduce false alarms, ensuring that the system is both responsive and reliable during emergencies.

The 4120 model is tailored for larger facilities, incorporating advanced networking features that enable communication between multiple control panels. This interconnectedness is crucial for managing complex building systems, allowing for centralized monitoring and control. It integrates with a variety of life-safety systems and can be configured to accommodate a vast number of addressable points, making it ideal for expansive installations.

The 4020 model serves as a cost-effective solution for smaller establishments while maintaining essential functionalities. It focuses on delivering essential fire alarm capabilities without compromising on performance. Despite its more compact design, the 4020 still offers support for numerous devices and can be integrated into larger systems if needed.

All models in the 4100 series leverage modern communication technologies, offering network integration capabilities that enhance their usability. They support various communication protocols, including Ethernet, which facilitates remote monitoring and maintenance options via web-based interfaces. This ensures that system administrators can manage alerts and notifications from anywhere, streamlining incident response.

In summary, the Tyco 4100 series, featuring the 4100U, 4120, and 4020 models, stands out for its adaptability, technological advancements, and versatility. Their robust design caters effectively to diverse environments, making them a preferred choice for fire alarm and safety solutions in various sectors. Companies can rely on these systems not only for compliance but also for enhanced safety and operational efficiency.