Pinouts of Connectors

Serial Port Loopback (9 CheckIt) pinout

layout
schematic diagram
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Used to verify that a port is working. This one works with CheckIt.

9 pin D-SUB FEMALE connector pin-out & layout
9 pin D-SUB FEMALE connector  to the computer
Name Pin Pin Name
CD 1 6 DSR
CD 1 9 RI
RXD 2 3 TXD
DTR 4 6 DSR
RTS 7 8 CTS

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Pinouts.ru > Pinouts of Loopbacks >  Pinout of Serial Port Loopback (9 CheckIt) and layout of 9 pin D-SUB FEMALE connector

Source(s): Hardware Book, "Coolsys"
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