User’s Manual Series DC Electronic Load
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9.
Communication
9.1 Communication Interface
series electronic load has standard RS232 communication mode. User can select the
communication line to remote control the load.
The electronic load has a DB9 femal port at the end, which can be connected to the COM port of the
computer via standard RS-232 cable.
Select USB-to-serial port RS232 cable.
Caution: In actual practice, the electronic load uses only three of the 2.3.5 pins to communicate with
the device.
RS232 Pin Definition
Pin No.
Symbol
Description
1
DCD
Data Carrier Detect
2
TXD
Transmit Data (RS485-
A)
3
RXD
Receive
Data (RS485-B)
4
DTR
Data Terminal Ready
5
GND
Ground
6
DSR
Data Set Ready
7
RTS
Request to Send
8
CTS
Clear to Sent
9
RI
Ring Indicator
9.2 Communication Setting
Communication setting is used to set the communication parameter between the electronic load
and the upper computer. The electronic load communicates with the upper computer through
RS232, and users can purchase the required connection cable to realize the remote control with the
electronic load. Before connecting to the host computer, please make sure you have purchased the
specified connection cable and set the correct communication parameters in the system settings.
Setup Steps
1. Press Shift key and then Mode key to enter system <Menu> setting interface.
2. Press
【
System Config
】
to enter the setting interface.
3. Select
【
Communication address
】【
Baud rate
】
in <
System Config > page, set the
communication parameters to be consistent with the upper computer.