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7 24V Modbus RTU 4 Channel RS232 Serial Relay Module FS TH9X 2.4GHz 9CH Upgrade Transmitter with FS IA10B Receiver expect reliable coverage up to expect reliable coverage up to 50 70 meters 3K Carbon Fiber Construction: Provides superior strength to weight ratio essential for sustained high speed racing performance and impact resistance during competitive FPV events Each relay channel is optically isolated from the control circuit This module solves the critical challenge of galvanic isolation and long distance relay control in distributed automation systems where multiple devices must be managed through a single RS232 serial port
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