Epson L-1000 Technical Manual page 110

OPTIONAL EQUIPMENT
3.2.1 Model 8143 Serial Interface Operation
This printer has the capability to support the Model 8143 serial interface board as an option under RS232C
and 20mA neutral current loop.
Specifications
Synchronization
Bit rate
Word length
Start bit
Data bits
Parity bit
Stop bit
Signal level
RS-232C
Current loop
Handshaking
* Indicates that settings can be changed by DIP switch setting.
NOTE: Disconnect the parallel interface cable, if connected, before using 8143 board, because parallel interface
input is used to read jumper setting and DIP switch status.
Jumper Settings
3 - 2
Asynchronous
to 19200 BPS*
75
1 bit
7 or 8 bits*
Odd, even, or no parity*
1 bit or more
Mark = logical "1" (-3 to -27 V)
Space = logical "0" (+ 3 to + 27 V)
Mark = logical "1" (current ON)
Space = logical "0" (current OFF)
By REV signal or X-ON/OFF code (Signal polarity can be inverted by
jumper setting.)
Table 3-2. Jumper Settings
REV.-A
LQ-500/ L-1000