Interface Connector

Serial Interface(RS-232C)

Pin No.

Signal name

Direction

Function

 

 

 

 

 

 

 

 

 

 

 

1

 

FG

-

 

 

 

 

Frame Ground

 

 

 

 

 

 

 

 

 

 

 

2

 

TxD

Output

Transmit Data

 

 

 

 

 

 

 

 

 

 

 

3

 

RxD

Input

Receive Data

 

 

 

 

 

 

 

 

 

 

 

6

 

DSR

Input

Data Set Ready

 

 

 

 

 

 

 

 

 

 

 

7

 

SG

-

 

 

 

 

Signal Ground

 

 

 

 

 

 

 

 

 

 

 

20

 

DTR

Output

Data Terminal Ready

 

 

 

 

 

 

 

 

 

 

 

Serial Communication Interface(Example)

Printer

 

 

 

 

 

Host(DTE ex 8251)

SG

 

 

 

 

 

 

 

 

SG

 

 

 

 

 

 

 

 

TXD

 

 

 

 

 

 

 

TXD

 

 

 

 

 

 

 

RSD

 

 

 

 

 

 

 

RSD

 

 

 

 

 

 

 

DSR

 

 

 

 

 

 

 

RTS

 

 

 

 

 

 

 

 

 

 

 

 

 

DTR

 

 

 

 

 

 

 

CTS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DSR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DTR

 

 

 

 

 

 

 

 

 

 

S.G

 

 

 

 

 

 

S.G

Serial Interface(RS-485)

 

 

Pin No.

 

Signal Name

Direction

Function

 

 

 

 

 

 

 

 

 

 

 

1

 

FGND

-

 

 

 

 

Frame Ground

 

 

 

 

 

 

 

 

 

 

 

2

 

SD2

Output

Send Data

 

 

 

 

 

 

 

 

 

3

 

SD1

Output

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

 

RD2

Input

Receive Data

 

 

 

 

 

 

 

 

 

5

 

RD1

Input

 

 

 

 

 

 

 

 

 

 

 

 

 

7

 

SGND

-

 

 

 

 

Signal Ground

 

 

 

 

 

 

 

 

 

 

 

8

 

DR2

Output

Same as DTR(RS-232)

9

 

DR1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10

 

CS2

Input

Same as DSR(RS-232)

11

 

CS1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

30

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Samsung SRP-270P, SRP-270S Serial InterfaceRS-232C, Serial Communication InterfaceExample, Serial InterfaceRS-485

SRP-270U, SRP-270S, SRP-270P, SRP-270 specifications

The Samsung SRP-270 is a robust and reliable thermal receipt printer that is well-regarded in retail and service environments. This device is designed to handle high-volume printing tasks with efficiency and precision, making it a valuable asset for businesses focused on customer service and operational excellence.

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