Service manual

SRP-150
Rev. 1.02
- 21 -
3-5-1(c) Cable Connection
Figure 3-5-1(c) RS-232C Cable Connection
3-5-1(d) Signal Description
Pin No. Signal name Direction Function
1 FG - Frame Ground
2 TXD Output Transmit Data
3 RXD Input Receive Data
4 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.
5 GND Ground Ground
6 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.
7 CTS Input Clear To Send
8 RTS Output Ready To Send
9 CTS - Clear To Send
Table 3-5-1(d) RS-232C Pin Description
HOST
FEMALE (DB9P)
PRINTER
MALE (DB9P)