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2.3
Network Connections
The UNO-1110 is equipped with a SMSC LAN8720AI (LAN1) & a DAVICOM
DM9000BI (LAN2) Ethernet LAN controller that provide standard RJ-45 jack with 10/
100 Mbps. LED indicators on the front side to show its Link (Green LED) and Active
(Yellow LED) status.
Table 2.3: Ethernet RJ-45 Connector Pin Assigns
Pin
1
2
3
4
5
6
7
8
2.4
Serial Connections
2.4.1
Serial Mode and Terminator Resistor Selection
UNO-1110 provides 5 serial COM ports, COM1 - COM4 provide RS-232/422/485,
and COM5 provides RS-485. The default settings of COM1 - COM4 are RS-232.
Users can change COM1 - COM4 types to RS-422 or RS-485 by SW3/SW4 DIP
switch selection located on rear side of UNO-1110. UNO-1110L supports COM1 and
COM2 ports only.
You can enable RS-422/485 terminator resistors if necessary to match impedance.
Especially in fields with electric noise, enabling terminal resistors is helpful to stabi-
lize communications. Make sure that both sides of the RS-422 or RS-485 communi-
cation ports are installed on BUS.
Table 2.4: COM1 - COM4 Serial Port Setting
COM1/COM3
DIP Switch
UNO-1110 Quick Start Guide
10/100Base-T Signal Name
XMT+
XMT-
RCV+
NC
NC
RCV-
NC
NC
COM2/COM4
Serial Mode
DIP Switch
N/A
RS-232 Standard Mode
RS-422 Master
Receiver Termination Mode
N/A
N/A
120 Ohms Terminator Resistor
8
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