Pinouts of Connectors

EIA530 (RS530) interface pinout

layout
schematic diagram

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The RS530 interface is a generic connector specification. It´s not an actual interface. The connector pinning can be used to support RS422, RS423, V.35 and X.21 to name the most popular ones.

25 pin D-SUB MALE connector pin-out & layout
25 pin D-SUB MALE connector  at the DTE (Computer)

RS530 is just like RS422 and uses a differential signaling on a DB25 - RS232 format - EIA-530 Transmit (and the other signals) use a twisted pair of wires (TD+ & TD-) instead of TD and a ground reference as in RS232 or V.24. This interface is used for HIGH SPEED synchronous protocols. Using a differential signaling allows for higher speeds over long cabling. This standard is applicable for use at data signaling rates in the range from 20,000 to a nominal upper limit of 2,000,000 bits per second. Equipment complying with this standard, however, need not operate over this entire data signaling rate range. They may be designed to operate over a narrower range as appropriate for the specific application.

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)

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25 pin D-SUB FEMALE connector pin-outs & layouts
25 pin D-SUB FEMALE connector  at the DCE (Modem)
Pinouts.ru > Pinouts of serial ports >  Pinout of EIA530 (RS530) interface and layout of 25 pin D-SUB MALE connector and 25 pin D-SUB FEMALE connector

Source(s): RS530 Page at Connectivity Knowledge Platform (Made IT), arcelect
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