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2.3.7 Termination Resistor (JP6)
The onboard termination resistor (120 ohm) for COM3/COM4 can be
used for long distance transmission or device matching (Default Open).
COM3
COM4
Close: Enable termination resistor.
Note:
Please refer to Figure A.3 for location of JP6
2.4 LAN: Ethernet Connector
The UNO-3072 is equipped with a Realtek RTL8139C Ethernet LAN con-
troller that is fully compliant with IEEE 802.3u 10/100Base-T CSMA/CD
standards. The Ethernet port provides a standard RJ-45 jack on board, and
LED indicators on the front side to show its Link (Green LED) and Active
(Y ellow LED) status.
2.5 Onboard Isolated Digital Input
The UNO-3072 has 4 isolated DI channels designated DI0~DI3.
2.5.1 Pin Assignments
The connector type of UNO-3072 is plug-in screw terminal block that
enables you to connect to field I/O devices directly without additional
accessories. Figure 2.4 and Table 2.4 shows its pin assignment as well as
signal description.
RS-422
Close A
TX3-TR
Close B
RX3-TR
Close C
TX4-TR
Close D
TX4-TR
17
RS-485
Data+, Data-
Data+, Data-
Chapter 2
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