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32CH NPN/PNP Optically Isolated Input & 300MA NPN Solid State Relay Output RS485 Modbus RTU PLC IO Expansion Board
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Conversion RS485 to 4-20mA 0-5V 0-10V Transform Module 2 4 Channel Modbus RTU RS485 to Analog Industrial Converter Modules
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JSY-MK-1039 80A 220V RS485 Modbus-RTU Communication Bi-directional Metering AC Single Phase Energy Meter Din Rail
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JSY1003F Single-phase AC TTL Modbus-RTU Embedded Metering Module With 63A Split-core CT
Aliexpress UK