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User's Manual
15.2 RS-485 Port Setup
RS485 uses half-duplex mode. RS485 uses part of the DB9 interface and the definition as follows.
If user uses Modbus protocol, it should set the local address.
15.3 LAN Port Setup
Indicator of LAN port
15.4 USB Port Setup
USB virtual serial port communication: enable USB bus and the setting is same as RS232.
Instruments.uni-trend.com
DB9 Pin
5
8
9
Figure 14-2 LAN Port on Rear Panel
LED
Illuminated
Green
Extinguished
Orange
Illuminated
Function
GND
485A
485B
State
Blinking
10M communication rate
100M communication rate
UDP6722 Programmable DC Power Supply
Meaning
Connecting
Communicating
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