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      DC 5V 12V 4 Channel RS232 Serial Relay Control Module Switch Board SCM PC Controller

      DC 5V 12V 4 Channel RS232 Serial Relay Control Module Switch Board SCM PC Controller

      Features:   Power requirements: DC 4.5-5V, inside positive outside negative; or DC 9-12V...
      $13.38
      0 reviews
      TKG2R-1E-K224 2 Channel Relay Module PLC Amplification Board Controller DC 12V

      TKG2R-1E-K224 2 Channel Relay Module PLC Amplification Board Controller DC 12V

      Specification:   Model:  TKG2R-1E-K824 I/O points: 2 Input signal: NPN and PNP...
      $11.99
      0 reviews
      TKG2R-1E-K424 4 Channel Relay Module PLC Amplification Board Controller With Indicator Light DC 12V

      TKG2R-1E-K424 4 Channel Relay Module PLC Amplification Board Controller With Indicator Light DC 12V

      Specification:   Model:  TKG2R-1E-K424 I/O points: 4 Input signal: NPN and PNP...
      $14.49
      0 reviews