1.3.3 Optional LocalTalk Interface (LocalTalk/Serial Module)
The optional LocalTalk/Serial module contains LocalTalk interface with the following characteristics.
Type:
LocalTalk
Signal level:
Same as RS-422 signal level
Protocol:
X-ON/X-OFF (cannot be combined with DTR control)
DTR control (cannot be combined with X-ON/X-OFF)
Transfer speed:
230.4 K BPS
Signal description:
See Table 1-11.
Table 1-11. LocalTalk Interface Pin Assignments
Pin No. Signal Name I/O
Description
1
DTR
O
Signal output by the printer. When the DTR signals HIGH, the RXD
signal can be received by the printer.
2
CTS
I
The printer transmits the data through TXD while CTS is HIGH.
3
TXD-
O
Serial ASCII data output from the printer.
HIGH level: when SD+ voltage is higher than SD- voltage.
LOW level: when SD+ voltage is less than SD- voltage.
Logic 0 “ SPACE” and logic 1 “ MARK” must be maintained between
transmitted character codes.
4
GND
-
Ground.
5
RXD-
I
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 0 “ SPACE” and logic 1 “ MARK” must be maintained between
transmitted character codes.
6
TXD+
O
Refer to TXD-.
7
N.C.
-
Not connected.
8
RXD+
I
Refer to RXD-.
EPL-N1200 Service Manual
General Description
Rev. A
1-21
Summary of Contents for EPL-N1200
Page 1: ...EPSON TERMINAL PRINTER EPL N1200 SERVICE MANUAL EPSON 4006838 ...
Page 8: ...REVISION SHEET I Revision I Issue Date Revision Page Rev A December 9 1996 1st issue vii ...
Page 111: ...Chapter 4 Adjustment No adjustment is required in this product ...
Page 127: ...6 ii Rev A ...
Page 133: ...Figure A 2 Engine Section Cable Connection Appendix A EPL N1200 Service Manual A 2 Rev A ...
