ITech IT8500plus Series User Manual page 53

DB9 Serial Port
In order for the computer to communicate with the DC load, both must be set to
the same RS-232 settings. These communication settings are:
1.
2.
3.
4.
5.
Parity=None
RS-232
IT8514B+/IT8514C+/IT8516C+ series electronic load have a DB9 interface on
rear panel. Connect E-load and computer by cable of COM ends (DB9).
Composite key [Shift]+[8] on front board can be used to enter system menu for
activation.

RS-232 Interface
In RS-232 interface, all SCPI commands can be used for programming. If
RS-232 interface is selected, in accordance with internal connection of data
terminal equipment (DTE) and data communication equipment (DCE) as
defined in EIA RS-232, the load is connected to another DTE (e.g., PC COM
interface) with direct-connected Modem cable.

Communication Setup
Please ensure the PC and the load have the same configuration in the following
items.
Baudrate: 9600(4800、9600、19200、38400).You could enter the system menu
Address: the range is from 0 to 31, default setting is 0
Baud rate: 4800,9600,19200 and 38400 are selectable, default setting is
9600. Refer to chaptor 1.7.
Data bit: 8 bit
Stop bit: 1
Parity: None,Even, Odd, default is None, refer to chaptor1.7.
Start Bit
RS232 Pins of Plug
Copyright © Itech Electronics Co., Ltd.
8 Data Bits
Base Pin Description
Number
1 No conjunction
2 TXD, data transmission
3 RXD, data receiving
4 No conjunction
5 GND, grounding
6 No conjunction
7 CTS, clear to send
8 RTS, request to send
9 No conjunction
Communication Interfaces
Stop Bit
44