SP-401 User Manual
Telpar, Inc.
Page 10 of 25
4.1.1 Serial Interface Switch Settings
The data word parameters must be set in the printer to
correspond with the settings of the host computer. These are set
using the DIP switches SW1 located on the back of the SP-401
chassis. See Appendix B for a visual aid.
Set the baud rate using SW1-5 through SW1-8 according to the
table below.
SWITCH
SW1-8
SW1-7
SW1-6
SW1-5
BAUD
RATE
50
ON
ON
ON
ON
75
OFF
ON
ON
ON
110
ON
OFF
ON
ON
134.5
OFF
OFF
ON
ON
150
ON
ON
OFF
ON
300
OFF
ON
OFF
ON
600
ON
OFF
OFF
ON
1200
OFF
OFF
OFF
ON
1800
ON
ON
ON
OFF
2000
OFF
ON
ON
OFF
2400
ON
OFF
ON
OFF
3600
OFF
OFF
ON
OFF
4800
ON
ON
OFF
OFF
7200
OFF
ON
OFF
OFF
9600
ON
OFF
OFF
OFF
19200
OFF
OFF
OFF
OFF
Set the stop bits, data bits and parity using SW1-1 through 4
according to the table below.
Switch
Function
Off
On
SW1-1
Stop bits
2
1
SW1-2
Data Bits
8
7
SW1-3
Parity
Enable
Disable
SW1-4
Parity
Even
Odd
Select current loop or RS-232 interface using JP2 and JP3 on the
component side of the back board. See Appendix B for a visual aid
for proper jumper placement.
Jumper
RS-232
20 mA
JP3
pins 1,2
pins 2,3
JP2
pins 1,2
pins 2,3