Samsung SRP-350PG Service Manual - Page 18

-1-c Cable Connection, 5-1-d Signal Description, Samsung Electro-Mechanics

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2 Product Specifications 2-5 Interface Specifications 2-5-1-(c) Cable Connection PRINTER SIDE(25P) (S.G) 1 (TXD) 2 (RXD) 3 (DSR) 6 (DTR) 20 (S.G) 7 HOST SIDE(25P) 1 (S.G) 2 (TXD) 3 (RXD) 4 (RTS) 5 (CTS) 6 (DSR) 20 (DTR) 7 (S.G) PRINTER SIDE(25P) (S.G) 1 (TXD) 2 (RXD) 3 (DSR) 6 (DTR) 20 (S.G) 7 HOST SIDE(9P) 1 (S.G) 3 (TXD) 2 (RXD) 7 (RTS) 8 (CTS) 6 (DSR) 4 (DTR) 5 (S.G) Figure 2-7 RS-232C Cable Connection 2-5-1-(d) Signal Description Pin No. Signal Name Signal Direction Function BODY Frame GND - Frame Ground 2 TXD Output Transmit Data 3 RXD Input Receive Data 4 RTS Outnput 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) MARK(Logic1) : The host can receive a data. SPACE(Logic0) : The host can not receive a data The printer transmits a data to the host, after confirming this signal. . When XON/XOFF flow control is selected, the printer does not check this signal 7 Signal GND - Signal Ground 20 DTR Output This Signal indicates whether the printer is busy. (H/W flow control) MARK(Logic1) : The printer is busy SPACE(Logic0) : The Printer is not busy The host transmits a data to the printer, after confirming this signal. When XON/XOFF flow control is selected, the host does not check this signal. Table 2-12 RS-232C Pin Description Note : Refer to the Operation Manual about the busy condition. 2-10 Samsung Electro-Mechanics

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2 Product Specifications
2-10
2-5 Interface Specifications
2-5-1-(c) Cable Connection
Figure 2-7 RS-232C Cable Connection
2-5-1-(d) Signal Description
Pin No.
Signal Name
Signal Direction
Function
BODY
Frame GND
-
Frame Ground
2
TXD
Output
Transmit Data
3
RXD
Input
Receive Data
6
DSR
Input
This signal indicates whether the host computer can receive data. (H/W flow control)
MARK(Logic1) : The host can receive a data.
SPACE(Logic0) : The host can not receive a data
The printer transmits a data to the host, after confirming this signal.
When XON/XOFF flow control is selected, the printer does not check this signal
.
7
Signal GND
-
Signal Ground
20
Note
: Refer to the Operation Manual about the busy condition.
DTR
Output
This Signal indicates whether the printer is busy. (H/W flow control)
MARK(Logic1) : The printer is busy
SPACE(Logic0) : The Printer is not busy
The host transmits a data to the printer, after confirming this signal.
When XON/XOFF flow control is selected, the host does not check this signal.
Table 2-12 RS-232C Pin Description
(S.G)
1
(TXD)
2
(RXD)
3
(DSR)
6
(DTR)
20
(S.G)
7
1
(S.G)
2 (TXD)
3 (RXD)
4 (RTS)
5 (CTS)
6 (DSR)
20 (DTR)
7
(S.G)
PRINTER
SIDE(25P)
HOST
SIDE(25P)
(S.G)
1
(TXD)
2
(RXD)
3
(DSR)
6
(DTR)
20
(S.G)
7
1
(S.G)
3 (TXD)
2 (RXD)
7 (RTS)
8 (CTS)
6 (DSR)
4
(DTR)
5
(S.G)
PRINTER
SIDE(25P)
HOST
SIDE(9P)
Samsung Electro-Mechanics
4
RTS
Out
nput
Ready To Send
5
CTS
Input
Clear To Send