4pcs Dual RS485 RS232(TTL) Modbus AT Command Switch Module for Relay Control, IO Switching, NPN PNP Support

4pcs Dual RS485 RS232(TTL) Modbus AT Command Switch Module for Relay Control, IO Switching, NPN PNP Support
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sku: 1005008840190575
$30.60-3%
$29.71
Shipping from: China
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