3Ch 1Hz-20kHz Duty Cycle Frequency Adjustable PWM Square Wave Pulse Generator UART RS232 RS485 Bus Modbus Power Supply

3Ch 1Hz-20kHz Duty Cycle Frequency Adjustable PWM Square Wave Pulse Generator UART RS232 RS485 Bus Modbus Power Supply
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sku: 1005004458704238
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$3.12
Shipping from: China
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