UT3500 series
User Manual
56
10.2 RS485 Interface
The instrument is equipped with RS485 interface as standard. The RS485 interface and
the RS232 interface of the instrument share the same DB9 terminal:
RS485 is a communication interface that supports multi-machine communication, which
can be connected with multiple slaves through one host.
The detailed RS485 specification is not the focus of this user manual, please refer to
https://en.wikipedia.org/wiki/RS-485
Pin
Function
8
A
9
B
10.3 USB Interface
On some relatively new computers and laptops, the RS232 interface has been cancelled
and the USB interface is used for communication. The instrument has a built-in USB-232
interface, and this virtual port can achieve the same function as RS232.
Turn on the USB Function in the Instrument
The instrument's [SYSTEM CONFIG] page has the option of USB/RS232. Before using
the USB interface for communication, please set it to USB.
Setting steps: enter the <SYSTEM CONFIG> page, use the cursor keys to select the
[REMOTE] field, and then use the function keys to select USB .
Install the Driver on the Computer
The USB interface requires a driver to be installed on the computer to work properly. Steps
to install USB driver:
1. Insert the USB cable into the computer and the instrument: