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1. Select RS422 or RS485 Mode
The
JP1 is used to select RS422 or RS485 for port
1 and the JP3 is used to select RS422 or RS485 for port 2. To
short pin 1,2 means select RS422 mode, otherwise to short pin
2,3 means select RS485 mode.
Jumper
|
RS422
|
RS485
|
JP1 for port 1
|
Short 1,2
|
Short 2,3
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JP3 for port 2
|
Short 1,2
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Short 2,3
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2. Select Receive Mode
The
JP2 and
JP4 are used to select receive mode. To short 1,2 means select receive
always enable, and short 2,3 means select RTS to enable receive. The
JP2 is used to select receive mode for port 1 and the JP4 is used to
select receive mode for port 2.
Jumper
|
Receive always enable
|
Enable by RTS
|
JP2 for port 1
|
Short 1,2
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Short 2,3
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JP4 for port 2
|
Short 1,2
|
Short 2,3
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3. Select High Speed or Normal Speed Mode
The
JP5 and
JP6 are used to select high speed mode or normal speed mode; the clock
is 7.3728MHZ for high-speed mode, and 1.8432MHZ for normal speed mode.
For high-speed mode, the baud rate speed up to 460K. The JP5 is used to
select speed for port 1 and the JP6 is used to select speed for port
2.
Jumper
|
Normal Speed
|
High Speed
|
JP5
for port 1
|
Short 1,2
|
Short 2,3
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JP6 for port 2
|
Short 1,2
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Short 2,3
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Pin
|
Clock Rate
|
Mode
|
Short 1,2
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1.8432MHZ
|
Normal Speed
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Short 2,3
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7.3728MHZ
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High Speed
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