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Appendix a: rs-232 connections, Esp904, Db-9 – B&B Electronics ESP904 - Manual User Manual

Page 77: Outs in, Rs-232

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RS-232 Connections

Manual Documentation Number: ESP904-4513m

Appendix

67

B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104 – www.bb-elec.com

B&B Electronics Ltd – Westlink Commercial Park – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445 – www.bb-europe.com

A

A

P

P

P

P

E

E

N

N

D

D

I

I

X

X

A

A

:

:

R

R

S

S

-

-

2

2

3

3

2

2

C

C

O

O

N

N

N

N

E

E

C

C

T

T

I

I

O

O

N

N

S

S

ESP904 DB-9 Pin-outs in RS-232 Mode

RS-232

Signal Name

DTE

RS-232

DB-9M

Pin

Carrier Detect

In

DCD

1

Receive Data

In

RXD

2

Transmit Data

Out

TXD

3

Data Terminal Ready

Out

DTR

4

Signal Ground

---

GND

5

Data Set Ready

In

DSR

6

Request To Send

Out

RTS

7

Clear To Send

In

CTS

8

Ring Indicator

In

RI

9

Figure 57. RS-232 Connections in a DB-9 Connector

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