Datalogic DS4800 Reference Manual

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Datalogic DS4800 Reference Manual Manual pdf 67 page image

25-PIN CABLE ELECTRICAL CONNECTIONS 55.2.1 RS232 InterfaceThe serial interface is used in this case for point-to-point connections; it handlescommunication with the host computer and allows both transmission of code data and theprogramming of the scanner. This is the default setting.The following pins are used for RS232 interface connection:25-pin Name Function2 TX Transmit Data3 RX Receive Data4 RTS Request To Send5 CTS Clear To Send7 GND GroundIt is always advisable to use shielded cables. The overall maximum cable length must beless than 15 m (49.2 ft).DS48007453GNDRTSCTSRXTX2USER INTERFACEGNDCTSRTSTXDRXD1ChassisFigure 46 – RS232 Main Interface Connections Using Hardware HandshakingThe RTS and CT nected devices.S signals control data transmission and synchronize the conSTARTOFTRANSMISSIONENDOFTRANSMISSION+ VRTS- V+ VTX DATA- V+ VCTS- VDATATRANSMISSIONDATATRANSMISSIONC1 C2 C4C3 C5TRANSMISSIONSTOPPEDENABLEDDISABLEDENABLEDIDLE IDLEFigure 47 - RS232 Control SignalsIf the RTS/CTS handshaking protocol is enabled, the DS4800 activates the RTS output toindicate a message is to be transmitted. The receiving unit activates the CTS input to enablethe transmission.57