B&K 1787B, 1786B, 1788 Remote Operation Mode, IT-E131 Communication cable, Communication setting

Chapter 4 Remote Operation Mode

The DB9 interface connector on the rear panel of the power supply can be transferred to RS-232 interface, the following information will tell you how to use the computer to control the output of the power supply.

4.1 IT-E131 Communication cable

The DB9 interface connector on the rear panel of power supply is TTL voltage level; you can use the communication cable (IT-E131) to connect the DB9 interface connector of the power supply and the RS-232 interface connector of computer for the communication.

Computer side TTL? RS232 Cable (IT-E131) PS side

PC

PC

IT-E131 communication cable

Power supplyLoad

COMPUTER	IT	IT-E131 ISOLATED		TX	INSTRUMENT
		COMMUNICATION CABLE		RX
	RS232	ISOLATION	TTL(5V)
	859666668889942311

Note: It will not work if you connect the DB9 interface connector of the power supply to the RS232 interface connector of computer directly by a standard RS232 cable. Please use IT-E131 to connect them.

4.2 Communication setting

Before using the remote operation mode, please make sure that the baud rate and communication address in power supply 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.

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

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

3. Data bit: 8 bit

4. Stop bit: 1

5. Parity: None

PARITY = NONE

Start

Bit

8 Data Bits

Stop

Bit

19