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EIA-530 (RS-530)
coté DTE
coté DCE


Pin Name Dir Description Circuit Paired with
1     Shield   18
2 TxD --> Transmitted Data BA 14
3 RxD --> Received Data BB 16
4 RTS --> Request To Send CA 19
5 CTS --> Clear To Send CB 13
6 DSR --> Data Set Ready CC 22
7 SGND   Signal Ground Ground 21
8 DCD --> Data Carrier Detect CF 10
9   --> Rtrn Receive Sig. Elmnt Timing DD 17
10   --> Rtrn DCD CF 8
11   --> Rtrn Transmit Sig. Elmnt Timing DA 24
12   --> Rtrn Transmit Sig. Elmnt Timing DB 15
13   --> Rtrn CTS CB 5
14   --> Rtrn TxD BA 2
15   --> Transmit Signal Element Timing DB 12
16   --> Rtrn RxD BB 3
17   --> Receive Signal Element Timing DD 9
18 LL --> Local Loopback LL 1
19   --> Rtrn RTS CA 4
20 DTR --> Data Terminal Ready CD 23
21 RL --> Remote Loopback RL 7
22   --> Rtrn DSR CC 6
23   --> Rtrn DTR CD 20
24   --> Transmit Signal Element timing DA 11
25   --> Test Mode TM