Answer:
The GST P-9945A features two photoelectrically isolated RS485 interfaces operating at 4800 bps, supporting up to 32 networked GST series control panels. The maximum allowable distance between two adjacent nodes is 1,200 meters using 1.0 mm² or larger twisted pair cable.
The GST P-9945A Loop Network Card is designed for high-integrity inter-panel communication in addressable fire alarm installations. Its verified technical parameters include:
- Communication Interfaces: Two photoelectric isolation RS485 ports.
- Baud Rate: 4800 bps.
- Communication Distance: Under 1,200 meters between neighboring panel nodes.
- Network Capacity: Up to 32 GST series control panels connected across the network.
- Transmission Medium: 1.0 mm² or larger twisted pair wiring; shielded twisted pair (STP) is recommended.
- Ambient Operating Temperature: 0°C to +40°C.
