5
Software Setup
Make sure your software is set to use the same serial COM port that the RS-
485 converter was assigned. Refer to
Finding the Assigned COM Port Number
and
Changing the COM Port Number
in this manual for details. There are no
hardware settings required by the RS-485 Converter and power is provided by
the USB port. All other settings, such as BAUD rate, are taken care of by your
software. The converter automatically switches between transmit and receive so
RTS is not required.
DIN Rail Mounting
The converter is designed to mount on standard 35mm DIN rail. It can be easily
snapped on and off the DIN rail without the need for any tools.
Lift up on the release lever to un-snap the converter from the rail.
Connecting to the RS-485 Bus
Connect the converter to the RS-485 bus using the A, B, and G. Connect the
G terminal to the RS-485 bus ground or shield. The G ground is galvonically
isolated from the converters USB ground. A and B are the noninverting and
inverting RS-485 transceivers.
The converter does not inlcude an internal bus terminating resister. RS-485 bus-
ses typically require a terminating resister at each end of the bus. Connecting di-
rectly to a device, to perform a confi guration for example, may be done without
a terminating resistor.
Status LED
When the converter is connected to a USB port the LED will be green after
the USB enumeration process completes and the USB drivers have sucessfully
initialized. A green LED indicates that the converter is ready to receive or is
receiving.
The LED will be red while the converter is transmitting RS-485 data.
35mm DIN Rail
Release Lever
