TITAN-SVX-ETH Hardware Manual
page 18
Rev 4.03
Daisy Chaining
For a multi-drop RS-485 network, be sure that the network uses daisy-
chain wiring.
Number of Nodes
The maximum number of nodes recommended is 32. Increasing beyond
this number will require special attention
Twisted Pair Wiring
To reduce noise, it is recommended to use twisted pair wiring for the 485+
and 485- lines. This technique will help cancel out electromagnetic
interference.
Termination
For an RS-485 network, it may be required that a 120 Ohm resistor is
placed in between the 485+ and 485- signals, at the beginning and end of
the bus. A terminal resistor will help eliminate electrical reflections on the
RS-485 network.
Note that on short communication buses, or buses with a small number of nodes,
termination resistors may not be needed. Inclusion of terminal resistors when
they are not needed may mask the main signal entirely.
5.3. USB Communication
The TITAN-SVX-ETH uses USB 2.0 Virtual Communication.
5.3.1. Virtual Communication Settings
The TITAN-SVX-ETH uses same communication port settings as the serial
communication setting as shown in Table 5.0.
Parameter
Setting
Baud Rate
115,200
Byte Size
8 bits
Parity
None
Flow Control
None
Stop Bit
1
Table 5.1
5.4. Windows GUI
The TITAN-SVX-ETH comes with a Windows GUI program to setup, configure,
test, program, compile, download, and debug the controller. The Windows GUI
will perform all communication via RS-485. See TITAN-SVX-ETH Software
Users Manual for more details.