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English-7
COM2 and COM3 Port [AS57BSTD Series]
MODE1
MODE2
MODE3
COM Port
PIN
RS-485*2
RS-422*2
RS-422
R- D-
RXD-
RXD-
R+
D+
RXD+
RXD+
T-
TXD-
TXD-
COM2
T+
TXD+
TXD+
G
GND
R-
D-
RXD-
CTS-
R+ D+
RXD+
CTS+
T-
TXD-
RTS-
COM3
T+
TXD+
RTS+
Note 1: Blank = No Connection.
Note 2: When using RS-422 flow control, please refer to the COM3 Port signals table above for pin
assignments. At this time, COM2 and COM3 ports cannot be used individually.
Comparison of Flow Control Protocols
COM
Port
DOP-AE Series
DOP-A Series
DOP-AS57 Series
DOP-AS35 / AS38 Series
COM1
RS-232 flow control
supported
RS-232 flow
control
supported
RS-232 flow control
supported
RS-232 flow control
supported. But, when
RS-232 flow control
function is enabled,
COM3 can not be used.
COM2
RS-422 flow
control
supported
RS-422 flow control is not
supported.
COM3
RS-422 flow control
supported. But, when
RS-422 flow control
function is enabled,
COM3 can not be
used.
N/A
RS-422 flow control
supported. But, when
RS-422 flow control
function is enabled,
COM3 can not be used.
RS-232 flow control
supported. But, when
RS-232 flow control
function is enabled,
COM3 can not be used.
Note: For more detailed information regarding the pin definition for flow control, please refer to the pin
definition of serial communication of each series.
COM2
COM3
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deltaacdrives.com