20 Channel RS485 Relay Switch Digital Analog IO Module Modbus RTU PLC UART Expanding Board 4-20MA Current 0-10V Voltage Read

20 Channel RS485 Relay Switch Digital Analog IO Module Modbus RTU PLC UART Expanding Board 4-20MA Current 0-10V Voltage Read
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sku: 1005004654452730
$22.86
Shipping from: China
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