RS-530 (EIA530) Serial 25 pin

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Image:connector_dsub25m.png 25 pin D-SUB male connector at the DTE (Computer).

Image:connector_dsub25f.png 25 pin D-SUB female connector at the DCE (Modem).

EIA-530, or RS-530, is a balanced serial interface standard that generally uses a 25 pin connector. The RS530 isnĀ“t an actual interfaceis, but a generic connector specification. 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 layout

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

Implementation Options

DCE DTE
RS530 RS232
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
9 -
10 -
11 -
12 -
13 -
14 -
15 15
16 -
17 17
18 -
19 -
20 20
21 -
22 -
23 -
24 -
25 -

References

Category:Serial Connectors

 

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