16. RS-232C Interface

 

 

 

16.1.

Specifications

 

 

 

 

Transmission

Asynchronous, bi-directional, half-duplex

 

Baud rate

600, 1200, 2400, 4800, 9600 bps

 

Data bits

7 bits, 8 bits

 

 

 

 

 

Parity bits

1 bit, Even or Odd (for 7data bits) or Non parity (for 8 data bits)

 

Start bit

1 bit

 

 

 

 

 

Stop bit

1 bit

 

 

 

 

 

Code

ASCII

 

 

 

 

 

Terminator

CR LF, CR (CR: 0Dh,

LF: 0Ah)

 

Connector

D-sub 9 pin connector

 

 

 

Circuit and Pin Connection

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pin No.

Signal name

Direction

 

Description

 

 

 

 

 

 

 

 

 

2

TXD

Output

 

Transmit data

 

 

3

RXD

Input

 

Received data

 

 

5

SG

-

 

Signal ground

 

 

6

DSR

Output

 

Data set ready

 

 

7

(RTS)

-

 

Pin 7 is connected to pin 8

 

 

 

 

 

8

(CTS)

 

 

 

 

 

 

 

 

 

 

 

Case

FG

-

 

Shield (Frame ground)

 

 

 

 

 

Other

 

 

 

Not used

 

9

8

Bit Format

Data 7 bits

Data 8 bits

(male contact)

16. RS-232C Interface

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AD-4405 Weighing Indicator

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Image 58
A&D AD-4405 manual RS-232C Interface, Specifications, Circuit and Pin Connection, Bit Format