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EIA530 (RS530)

25 PIN D-SUB MALE (at the DTE)
25 PIN D-SUB FEMALE (at the DCE)

CORRECT?

25 PIN D-SUB MALE at the DTE (Computer).
25 PIN D-SUB FEMALE at the DCE (Modem).

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  

Note: Direction is DTE (Computer) relative DCE (Modem).

Contributor: Joakim Ögren, Greg A. Woods
Source: RS530 Page at Connectivity Knowledge Platform (Made IT)

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May be copied and redistributed, partially or in whole, as appropriate.
Document last modified: 2002-01-13