RS-232 (Serial) Connectors



PC/XT 25 Pin Serial Port Connector (DCE)

Pin 1Chassis Ground
Pin 2Transmit Data
Pin 3Receive Data
Pin 4Request To Send
Pin 5Clear To Send
Pin 6Data Set Ready
Pin 7Signal Ground
Pin 8Carrier Detect
Pin 9Unused
Pin 10Unused
Pin 11Unused
Pin 12Unused
Pin 13Unused
Pin 14Unused
Pin 15Unused
Pin 16Unused
Pin 17Unused
Pin 18Unused
Pin 19Unused
Pin 20Data Terminal Ready
Pin 21Unused
Pin 22Ring Indicator
Pin 23Unused
Pin 24Unused
Pin 25Unused


Serial Device Connector (DTE)

Pin 1Chassis Ground
Pin 2Transmitted Data
Pin 3Received Data
Pin 4Request To Send
Pin 5Clear To Send
Pin 6Data Set Ready
Pin 7Signal Ground
Pin 8Received Line Signal Detector
Pin 9Unused
Pin 10Unused
Pin 11Unused
Pin 12Unused
Pin 13Unused
Pin 14Unused
Pin 15Unused
Pin 16Unused
Pin 17Unused
Pin 18Unused
Pin 19Unused
Pin 20Data Terminal Ready
Pin 21Signal Quality Detector
Pin 22Ring Indicator
Pin 23Data Signal Rate Selector
Pin 24Transmit Signal Element Timing
Pin 25Unused


AT 9 Pin Serial Port Connector

Pin 1Carrier Detect
Pin 2Receive Data
Pin 3Transmit Data
Pin 4Data Terminal Ready
Pin 5Signal Ground
Pin 6Data Set Ready
Pin 7Request To Send
Pin 8Clear To Send
Pin 9Ring Indicator



General Information About RS-232 Devices


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