Answer:
The GST P-9940A operates across an RS-485 Class A loop at a fixed baud rate of 2400 bps, supporting node-to-node communication distances up to 1200 meters. It requires 1.0 mm² or larger twisted pair cable (shielded twisted pair recommended), operates from 0°C to +40°C (up to 95% relative humidity, non-condensing), and weighs approximately 0.1 kg.
The GST P-9940A Class A RS485 Network Card (SKU reference: KTI07001001P994) is an internal communication board engineered for robust inter-panel networking across fire detection systems. Operating on standard RS-485 serial architecture, the card is configured for high-reliability data exchange with the following engineering specifications:
- Communication Protocol & Topology: RS-485 Class A closed-loop ring.
- Transmission Speed: Fixed baud rate of 2400 bps.
- Maximum Node Spacing: Up to 1200 meters between adjacent control panels.
- Cabling Requirements: Minimum 1.0 mm² twisted pair fire-rated cable; shielded twisted pair (STP) is recommended to protect signal integrity in high-EMI industrial environments.
- Operating Environment: Operating temperature range of 0°C to +40°C with relative humidity up to 95% (non-condensing).
- Weight: Net unit weight of approximately 0.1 kg.
