The DB9 interface connector on the rear panel of electronic load is TTL voltage level; you can use the communication cable (IT-E132) to connect the DB9 interface connector of the electronic load and the USB interface connector of computer for the communication.

 

IT-E132 communication

 

PC

cable

Load

 

COMPUTER

IT IT-E131 ISOLATED COMMUNICATION CABLE

RS232 ISOLATION TTL(5V)

859666668889942311

RX

TX

INSTRUMENT

Note: Do not connect the DB9 connector of the electronic load directly to a PC or other RS232 port.

2 Communication between electronic load and PC

Before using the remote operation mode, please make sure that the baud rate and communication address in electronic load are the same as in the computer software, otherwise, the communication will fail, you can change the baud rate and communication address from the front panel or from computer.

1Address: the range is from 0 to 254,default setting is 0

2Baud rate: 4800,9600,19200 and 38400 are selectable, default setting is 4800

3Data bit8 bit

4Stop bit1

5ParityNone

Parity=None

Start Bit

8 Data Bits

Stop Bit

Stop Bit

 

3. Frame Format

Frame length is 26 bytes. Details as following:

AAH

Address

Command 4—25bytes are information content

Parity code

Description

1Start bit is AAHoccupies one byte.

2Address range from 0 to FE, occupies one byte.

3Each command occupies one byte. Following is the command details.

20H

Selecting the Remote control mode

 

 

21H

Selecting the input on/off state

 

 

22H

Setting the max input voltage

 

 

23H

Reading the max setup input voltage.

 

 

24H

Setting max input current

 

 

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B&K 8510 instruction manual Communication between electronic load and PC, Frame Format, IT-E132 communication