Optional Localtalk Interface; Table 1-11. Localtalk Interface Pin Assignments - Epson C11C605001 - DFX 9000 B/W Dot-matrix Printer Service Manual

Service Manual
EPL-9000

1.3.3 Optional LocalTalk Interface

This printer can use the optional LocalTalk interface module.
Type: LocalTalk
Signal level: Same as RS-422 signal level
X-ON/X-OFF (cannot be combined with DTR control)
Protocol:
Transfer speed: 230.4 K bps
Signal description: See Table 1-11.
Table 1-11. LocalTalk Interface
Pin No. Signal Name
I
4 I GND
5
NC
7
8
Rev. A
Signal output by the printer. When the DTR signals HIGH, the
IN The printer transmits the data through TXD while CTS is HIG}
Serial ASCII data output from the printer.
HIGH level; when SD+ voltage is higher than SD- voltage.
OUT LOW level; when SD+ voltage is less than SD- voltage.
Logic O is "SPACE" and logic 1 is "MARK" state must be
maintained between transmitted character codes.
Ground.
Serial ASCII data input from computer.
HIGH level; when RD+ voltage is higher than RD- voltage.
LOW level; when RD+ voltage is less than RD- voltage.
Logic O is "SPACE" and logic 1 is "MARK" state must be
maintained between transmitted character codes.
OUT Refer to TXD-.
connected.
Not
IN
General Description
Pin Assignments
1-19