4 Channel Relay Module AC 220V Modbus RTU Onboard Relay Switch RS485/TTL UART Interface 4 Way Input Output Power Supply Module

4 Channel Relay Module AC 220V Modbus RTU Onboard Relay Switch RS485/TTL UART Interface 4 Way Input Output Power Supply Module
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sku: 1005003033258718
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$6.63
Shipping from: China
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