Communication Interface And Terminal - UNI-T UTL8500 Series User Manual

Remote mode.
2. If you want to return to Local mode, just press the [Local] function key. At this time, the
word "Local" will be displayed at the top of the screen, indicating that the electronic
load is in Local mode.
3. Repeat step 1 to enter Remote mode again.

6. Communication Interface and Terminal

This chapter mainly covers the following:

RS-232C Communication

Introduction of Terminal
6.1 RS-232C
UTL8500 series electronic load is equipped with RS-232C communication interface
according to standards. You can use the corresponding communication lead for remote
operation if you need. There is a DB9 female interface at the end of the electronic load,
which can be connected to the computer COM port by using a standard RS-232C cable.
Note: In actual use, the electronic load only uses three pins (2, 3 and 5) to
communicate with the device. It is recommended to turn off the power of the instrument
when plugging or unplugging the connector to avoid electrical shock.
Table 6-1 Definition of COM Interface (RS-232C) Pins
Pin Number
1
2
3
4
5
6
7
8
9
The communication setting is mainly used to set the communication mode between the
electronic load and the host computer. The electronic load communicates with the upper
computer through RS-232C. The user can purchase the needed connecting lead to
achieve remote control with the electronic load. Before connecting to the host computer,
Symbol Description
TXD Transmit Data
RXD Receive Data
GND Ground
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UTL8500 Series User Manual
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RS-232C Connector
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