Bixolon SRP-270 用户手册

 

 

Figure 3-7 RS-232C Cable Connection 

Pin No.  Signal name 

Direction 

Function 

1 FG  - 

Frame 

Ground 

2 TxD Output 

Transmit 

Data 

3 RxD Input 

Receive 

Data 

4 RTS Output 

Ready 

To 

Send 

5 CTS Input 

Clear 

To 

Send 

6 DSR Input 

This signal indicates whether the host computer can receive data. 
(H/W flow control) 
  1) MARK(Logic1) : The host can receive a data. 
  2) SPACE(Logic0) : The host can not receive a data. 
  3) The printer transmits a data to the host, after confirming 

this signal. 

  4) When XON/XOFF flow control is selected, the printer does 

  not check this signal. 

7 SG  - 

Signal Ground 

20 DTR Output 

This signal indicates whether the printer is busy. (H/W flow control) 

1) MARK(Logic1) : The printer is busy. 

  2) SPACE(Logic0) : The printer is not busy. 
  3) The host transmits a data to the printer, after confirming 

 this signal. 

  4) When XON/XOFF flow control is selected, the host does not 

  check this signal. 

Table 3-15 RS-232C Pin Description 

 
 
3-5-1(e) H/W Flow Control 
When DTR/DSR flow control is select, before transmitting a data, the Printer checks whether the host is 
BUSY or not. If the host is BUSY, the Printer does not transmit a data to the host. If the host is not BUSY, the 
Printer transmits a data to the Host. The host is the same. Refer to the Interface Part of Chapter 4-3 Special 
Circuit Diagrams. 

PRINTER 

SIDE (25P) 

HOST 

SIDE (25P)

PRINTER

SIDE (25P)

HOST 

SIDE (9P)