Advantech UNO-1150, Руководство пользователя

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UNO-1150 User Manual 38
A.10 RS-422/485 Signal Pull High/Low Settings
(SW3/SW5/SW8/SW9)
Table A.13: Terminal Resistor Settings
COM Switch Pin Related Line Setting Description
COM2 SW3 1 Data- (RS-485)
Tx- (RS-422) * ON Pull low to GND
(4.7K Ohm)
OFF Open
2 Data+ (RS-485)
Tx+ (RS-422) * ON Pull high to 5V
(4.7K Ohm)
OFF Open
SW5 1 Rx- (RS-422) * ON Pull low to GND
(4.7K Ohm)
OFF Open
2 Rx+ (RS-422) * ON Pull high to 5V
(4.7K Ohm)
OFF Open
COM3 SW8 1 Data- (RS-485)
Tx- (RS-422) * ON Pull low to GND
(4.7K Ohm)
OFF Open
2 Data+ (RS-485)
Tx+ (RS-422) * ON Pull high to 5V
(4.7K Ohm)
OFF Open
SW9 1 Rx- (RS-422) * ON Pull low to GND
(4.7K Ohm)
OFF Open
2 Rx+ (RS-422) * ON Pull high to 5V
(4.7K Ohm)
OFF Open
Note1: * indicate the default setting.
Note2: The line would have the risk to be floating if it is set to
be Open. This setting is only for special purpose.