Hardware Configuration
The SB72EX has two asynchronous UART type serial ports, referred to as Port 0 and Port 1. They are
accessed through two DB-9 connectors. Port 0 can be configured for either RS-232 or RS-485 operation
(the factory default is RS-232), while Port 1 is permanently configured as a RS-232 port.
Single Port RS-232 Operation: We recommend using Port 1 as the Serial-To-Ethernet data port. Port 0 will
default to a “Debug Port” providing status messages on the operation of the SB72EX that can be viewed
using a serial terminal program such as the MTTTY utility.
Dual Port RS-232 Operation: Use both Port 0 and Port 1 as data ports. In the software configuration
changing Port 0 operation from “Debug” to “RS-232” will disable the status messages.
RS-422 or RS-485 Operation: Configure Port 0 using the settings below. Port 1 can be used as a RS-232
data port, or you can select the Debug option in the software configuration to make Port 1 the Debug port
for status messages.
To configure Port 0 as RS-422/485, you will need to open up your SB72EX case and change the position of
the five jumpers. (Note
:
Please take proper ESD precautions. Failure to do so will void your NetBurner
Standard Hardware Warranty.)
There are five 3-pin headers that can be jumpered in one of two positions: connecting pins 1 and 2, or
connecting pins 2 and 3. The five jumpers are located on the SB72EX board as shown below. Remember,
Port 1 is permanently configured as a RS-232 port.
o
To configure Port 0 as RS-485: Position each of the five jumpers so they connect pins 2
and
3.
o
To configure Port 0 as RS-232 (the default configuration): Position each of the five
jumpers so they connect pins 1 and 2.
Serial Port 0
Serial Jumper Settings
Serial Port 1
Ethernet RJ-45
Power LED
12VDC
Power Input
JP1
JP5
JP2
JP4
JP3
JP7 - RS-485 Half Duplex Transmit Echo Enable/Disable
Jumper Placement
Description
Jumper pins 1 and 2
Enables echo of transmitted characters.
Jumper pins 2 and 3
Disables echo of transmitted characters (factory default).
After you have your SB72EX configured correctly, you must select the corresponding software options
using the web interface.
SB72EX User's Manual, 350030-001
Page 4
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