RS-422串行口定义_广电电器网

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RS-422串行口定义

[日期:2008-07-20] 来源:  作者: [字体: ]

计算机侧 RS-422 串行接口的插口是 25 针公插:

37 PIN D-SUB MALE

 


设备侧 RS-422 串行接口插头是 25 针母插:

37 PIN D-SUB FEMALE

引脚定义


PIN

Name

Dir

Description

1

GND

---

ShiELD Ground

2

SRI

<--

Signal Rate InDICator

3

n/c

-

Spare

4

SD

-->

Send Data

5

ST

-->

Send Timing

6

RD

<--

Receive Data

7

RTS

-->

Request To Send

8

RR

<--

Receiver Ready

9

CTS

<--

Clear To Send

10

LL

-->

LOCal Loopback

11

DM

<--

Data Modem

12

TR

-->

Terminal Ready

13

RR

<--

Receiver Ready

14

RL

-->

Remote Loopback

15

IC

<--

Incoming Call

16

SF/SR

-->

Select Frequency/Select Rate

17

TT

-->

Terminal Timing

18

TM

<--

Test Mode

19

GND

---

Ground

20

RC

---

Receive Twister-Pair Common

21

GND

---

Spare Twister-Pair Return

22

/SD

---

Send Data TPR

23

GND

---

Send Timing TPR

24

GND

---

Receive Timing TPR

25

/RS

---

Request To Send TPR

26

/RT

---

Receive Timing TPR

27

/CS

---

Clear To Send TPR

28

IS

<--

Terminal In Service

29

/DM

---

Data Mode TPR

30

/TR

---

Terminal Ready TPR

31

/RR

---

Receiver TPR

32

SS

-->

Select Standby

33

SQ

<--

Signal Quality

34

NS

-->

New Signal

35

/TT

---

Terminal Timing TPR

36

SB

<--

Standby Indicator

37

SC

---

Send Twister Pair Common


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