StarTech.com CB1S485 - Manual (Page 5)

Instruction Manual
2
Hardware Guide
UART Input Clock Speed Selector
RS-422/485 Mode Selector
Switch
Name
Switch
Positions
Clock Speed
HSPD
(Up)
UART Input Clock
Speed =
1.8432MHZ,
Maximum baud
rate is115.2Kbps
(Down)
(Default)
UART Input Clock
Speed =
14.7456MHZ,
Maximum baud
rate is
926.1Kbps
(default).
Setting requires
adjustment from
Windows Device
Manager
Switch
Name
Jumper
Positions
Mode and
Termination
Resistor Setting
422
Up
(default)
2-wire RS-485
mode (Note)
Down
4-wire RS-422
mode
NECH
Up
Transmitting
data will be
echoed back
Down
(default)
No echo data
NLP
Up
RTS will be
connected to
CTS
Down
(default)
RTS and CTS
operate normally
HSPD
Switch
422/485
Mode Switch
No Echo/
Echo Switch
No Loop/
Loop Switch
NOTE:
1. Please note that if the mode were set at
“422” mode, the other settings (NECH
and NLP settings) will take no effect.
2. Echo mode is used to detect data
collisions. If the echoed data was not
equal to the transmitted data, then data
collisions are occurring.