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RS-422/485 Multiport Serial PCI Card
7
3.2.1
JP5: UART Input Clock Speed Selector
3.2.2
JP1: RS-422/485 Mode Selector
Mode Settings for both S1 and S2 (JP1):
Jumper Name
Jumper Positions
Mode and Termination Resistor
Setting
485/422
485
(Default)
2-wire RS-485 mode
422
4-wire RS-422 mode
RTS/AUTO
RTS
RS-485 Transmitter Buffer Enable is
Controlled by RTS (active high)
AUTO
(Default)
RS-485 Transmitter Buffer is
controlled automatically by ATTA
TM
hardware circuit
422
AUTO
NO_ECHO
NO_LOOP
485
RTS
ECHO
LOOP
HI
LO
W
UART Input Clock Speed = 14.7456MHZ,
the maximum baud rate is 926.1Kbps. In
this setting, you need go to Windows’
COM port Properties to detect this input
clock automatically and fit this clock
value (see the software setup for more
details)
HI
LO
W
UART Input Clock Speed = 1.8432MHZ,
the maximum baud rate is 115.2Kbps
(Default)
Содержание MSC-102B
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