3-RS485A | Edwards EST3 Network Communications Card, Class A/B with Audio Circuits

Edwards · Industrial Automation & Electrical

Description  The Edwards 3-RS485A is a network communications card designed for EST3 fire alarm and emergency communication systems. It provides Class A (Style 7) or Class B (Style 4) circuits for network data and dual Class A circuits for digitized audio signals. The 3-RS485A mounts directly to the 3-CPU1 and ensures reliable data and audio transfer between network nodes.     Technical Specifications  Condition New/Never Used Surplus Brand Edwards Category Computer Part Number 3-RS485A Subcategory Communication Card Mounting Attaches directly to 3-CPU1 Network Circuits 1 Class A (Style 7) or Class B (Style 4) Audio Circuits 2 Class A (Style 7) digitized audio Function Retransmits network messages to next node Maximum Nodes Supported 64 per network Wiring Media Copper or fiber (with 3-FIBMB) Fail-Safe Feature Direct-connect data ports on card/CPU failure Applications EST3 fire alarm and emergency communication Agency Listings UL/ULC approved Typical Use Network data and audio communications in life safety systems Weight 0.50 lbs (approx.)     Information About 3-RS485A The 3-RS485A is a critical component of the EST3 platform, enabling network communication and audio distribution across large fire alarm networks. It supports re-transmission of messages to extend wiring distances and improve overall system scalability. With up to 64 nodes, the EST3 network can span miles of copper or fiber cabling when used with the 3-FIBMB fiber module. Fail-safe circuitry ensures continuous operation by directly connecting data input and output ports in the event of a CPU or card failure. This design provides resilience and uninterrupted communication in mission-critical life safety applications. Key Features: Network Communications Interface: Provides connectivity for EST3 fire alarm network nodes. Class A/B Support: Configurable for Class A (Style 7) or Class B (Style 4) communication circuits. Dual Audio Channels: Two additional Class A circuits for digitized audio distribution. Re-Transmission Functionality: Boosts network length by forwarding messages to the next node. Extended Network Capacity: Supports up to 64 nodes over copper or fiber media. Fail-Safe Mechanisms: Direct-connect input/output ports if the CPU or card fails. Fiber Compatibility: Works with the 3-FIBMB module for fiber optic communication. Direct Mounting: Installs on the back of the 3-CPU1 central processor unit. Robust Communication: Ensures reliable signal delivery for fire alarm and emergency audio systems. UL/ULC Listed: Designed for compliance with life safety system standards. The 3-RS485A delivers the reliability and resilience required for network communication in Edwards EST3 fire alarm and emergency systems.

Brand: Edwards · Category: Industrial Automation & Electrical

Key features

• Network Communications Interface: Provides connectivity for EST3 fire alarm network nodes.
• Class A/B Support: Configurable for Class A (Style 7) or Class B (Style 4) communication circuits.
• Dual Audio Channels: Two additional Class A circuits for digitized audio distribution.
• Re-Transmission Functionality: Boosts network length by forwarding messages to the next node.
• Extended Network Capacity: Supports up to 64 nodes over copper or fiber media.
• Fail-Safe Mechanisms: Direct-connect input/output ports if the CPU or card fails.
• Fiber Compatibility: Works with the 3-FIBMB module for fiber optic communication.
• Direct Mounting: Installs on the back of the 3-CPU1 central processor unit.
• Robust Communication: Ensures reliable signal delivery for fire alarm and emergency audio systems.
• UL/ULC Listed: Designed for compliance with life safety system standards.

Specifications

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