User Manual
CHAPTER 9. REMOTE OPERATION 43
Pin # Signal
1 NC
2 TX
3 RX
4 NC
5 GND
6 NC
7 CTS
8 RTS
9 NC
Table 9.1: RS-232 (DE-9) Pinout
Note that the eledtronic load is congured for 1 start bit and 1stop bit (these values are xed). The correct
interface cables or adapters must be used, as described under RS-232 connector. Note that even if the cable has
the proper connectors for your system,the internal wiring may be incorrect. The interface cable must be
connected to the correct serial port on your computer (COM1, COM2,etc.).
9.1.2 RS-232 Communication settings
Before communication operation, please make sure that the following parameters of electronic load match that
of PC.
Baud rate 9600(4800,9600,19200,38400,57600,115200). You can enter system menu through panel to set
communication baud rate.
Data bit 8
Stop bit 1
Parity (none,even,odd)
EVEN 8 data bits with even parity
ODD eight data bits with odd parity
NONE eight data bits without parity
Recommended settings Start Bit, 8 Data Bits, Parity=None, 1 Stop Bit
9.2 USB interface
Use Type A to Type B USB cables to connect the power meter.
The USB interface capabilities of the power meter are described below:
• The interface is IEEE488.2 standard USB488 interface
• The interface accepts REN_CONTROL,GO_TO_LOCAL ,LOCAL_LOCKOUT request.
• The interface accepts MsgID = TRIGGER USBTMC command message and forwards TRIGGER requests
to the function layer.