SB72 User's Manual, 350030-006
Page 4
2.
Configure the serial jumpers.
WARNING: Incorrect jumper settings may result in damage to driver components
Jumper
RS-485
J2
Port 0
Half Duplex
RS-485
J2
Port 0
Full Duplex
RS-232
J6
Port 1
RS-232
J6
Port 0
TTL
J5
Port 0
TTL
J5
Port 1
JP1
CLOSE 2-3
CLOSE 1-2
X
X
OPEN
X
JP2
CLOSED
CLOSED
X
OPEN
OPEN
OPEN
JP3
X
X
CLOSED
X
OPEN
X
JP4
OPEN
OPEN or 2-3
RTS 2-3
CLOSE 1-2
OPEN
X
JP5
OPEN
OPEN or 2-3
CTS 2-3
CLOSE 1-2
OPEN
X
Key: X = don’t care, Open = No connection, Closed = Jumper pins
Note for RS-232 Operation: The SB72 can run 2 channels without hardware handshaking. If RTS
and CTS are required, then only Port 1 can be used. RTS and CTS are available at TTL levels on
the J5 connector for both channels.
3.
Connect the Ethernet port to your hub or computer
4.
Provide regulated 5V DC power to the board assembly. You can use the 5V power connector J8, or use
the power pins on J5.
5.
Verify the power and Ethernet are configured correctly by making sure the power led and link led are
on.
