System Sensor PR-3 Multi-Voltage Dual Form C Relay Module with 115/...

System Sensor PR-3 Multi-Voltage Dual Form C Relay Module

The System Sensor PR-3 is a multi-voltage dual form C relay module designed for integration into fire detection and alarm control systems. This relay module provides flexible voltage configuration and dual-contact switching capability, making it suitable for a range of commercial and industrial fire alarm applications where auxiliary relay functionality is required.

Overview

The PR-3 serves as an auxiliary relay interface for fire alarm control panels and detection systems. Its dual form C relay configuration provides both normally open and normally closed contact options, allowing integrators to design flexible switching logic for notification appliances, suppression system integration, and secondary control circuits. The module's multi-voltage design supports both 115V and 230V supply options, accommodating North American and international installation environments.

Key Features

• Dual form C relay contacts for flexible switching configurations
• Multi-voltage operation supporting 115V and 230V supply inputs
• Designed for integration with fire alarm control panels and detection equipment
• Compact module form factor suitable for retrofit and new installations
• Standard DIN rail or panel-mount installation options
• Reliable contact rating suitable for auxiliary control circuits and alarm notification integration

Integration & Compatibility

The PR-3 relay module is engineered to integrate into fire alarm systems where auxiliary relay functionality is needed for signaling, notification appliance control, or secondary system activation. Its standard relay contact configuration ensures compatibility with common fire alarm control architectures and third-party suppression, security, and building automation equipment that operate within the specified voltage range. The module's straightforward contact interface supports integration without requiring specialized drivers or protocol bridges.

Specifications

The PR-3 operates at multi-voltage levels, with support for both 115V and 230V supply configurations. Dual form C relays provide two independent contact sets per relay, enabling simultaneous normally open and normally closed switching. The module is designed to meet fire alarm industry standards for reliability and contact integrity in auxiliary control applications.

The PR-3 (often searched as PR 3) is sized for standard control panel integration and supports standard wiring practices used in fire alarm installations. Its straightforward electrical interface reduces commissioning complexity and supports rapid deployment in both new system builds and system expansions.

Karl Wilson

From a systems integration perspective, the System Sensor PR-3 addresses a specific but critical role in fire alarm control architecture. During fire system panel selections and auxiliary signal design, the dual form C relay configuration of the PR-3 provides the contact flexibility needed when control panels require external relay expansion for notification appliance circuits or integration with suppression system controls.

Technical Highlights:

• Dual Form C Relay Contacts: Provides both normally open and normally closed switching from a single relay module, simplifying circuit design when simultaneous signal states are required for different control logic branches
• Multi-Voltage Support: 115V and 230V supply compatibility allows the PR-3 to function across North American 60 Hz installations and international 50 Hz environments without module substitution

Deployment Considerations:

• Verify your control panel's auxiliary relay requirements and available mounting space before specification; the PR-3's compact form factor fits standard DIN rail installations but confirm clearance in your enclosure layout
• Ensure supply voltage matches your site's standard; voltage mismatch will prevent proper relay operation and create a system integrity issue during testing

The PR-3 is a straightforward relay expansion module suitable for fire systems where auxiliary switching is needed. It does not require special commissioning tools or advanced testing beyond standard fire alarm circuit verification. Specify the PR-3 when your control panel architecture calls for external dual-contact relay logic without protocol complexity.