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RS-485 Mode
The RS-485 mode supports the Transmit and Receive Channels using 2-wire half-
duplex operation. The data lines are differential with the Data B line positive relative
to Data A in the Mark state. Ground provides a common mode reference. Refer to the
Pin-out table for connections.
Selecting Internal RS-485 Bias Resistors
You can select RS-485 Receiver Biasing from the DSE-410D if your network doesn’t
supply any. Remove the two side cover screws, slide the cover off, then set the two
bias jumpers (shown open) to enable biasing (shorting).
RS-422 Mode
The RS-422 mode supports 4 channels with full duplex operation for Receive,
Transmit, RTS (Request To Send) and CTS (Clear To Send). The data lines are in
differential pairs with the B lines positive relative to the A lines. Ground provides a
common mode reference. To use handshaking, Flow Control must be set to RTS/CTS
during configuration. Refer to the Pin-out table for connections.
RS-232 Mode
The RS-232 mode supports eight channels plus Signal Ground and is configured as
DTE, like a computer. Signals are single-ended and referenced to Ground. To use
handshaking, Flow Control must be set to RTS/CTS during Configuration. Refer to
the Pin-out table for connections.
Default Setting
Use this mode to reset the original factory default settings when powered on.
Document Number: 940-0186-100 – DSE-410D Owner’s Manual 9
Quatech, Inc. - 5675 Hudson Industrial Parkway, Hudson, OH 44236 – 330.655.9000
http://www.quatech.com