## PC Com Port - EIA-574 RS-232/V.24 pin out on a DB-9 pin used for asynchronous data ## X.21 interface on a DB 15 connector ## RS232D uses RJ45 type connectors (similar to telephone connectors)
Pin No. | Signal Description | Abbr. | DTE | DCE
--- | --- | --- | --- | ---
1 | DCE Ready, Ring Indicator | DSR/RI | «— | —»
2 | Received Line Signal Detector | DCD | «— | —»
3 | DTE Ready | DTR | —» | «—
4 | Signal Ground | SG |  |
5 | Received Data | RxD | «— | —»
6 | Transmitted Data | TxD | —» | «—
7 | Clear To Send | CTS | «— | —»
8 | Request To Send | RTS | —» | «—
## This is a standard 9 to 25 pin cable layout for async data on a PC AT serial cable ## Some applications require more pins than a simple async. configurations.
Advanced Serial Data Logger input RS232 data directly into file, Excel, Access, or any Windows application.
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