Remote Operation Mode 
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4.2 USB interface 
Use a Cable with two USB port to connect the power and the computer. 
All power functions can be programmed via USB. 
The USB488 interface functions of the power supply described as below: 
  Interface is 488.2 USB488 interface. 
  Interface Receiver REN_CONTROL, GO_TO_LOCAL, and 
LOCAL_LOCKOUT request. 
  Interface receive MsgID = TRIGGER USBTMC order information, 
and will pass TRIGGER order to the functional layer. 
Power USB488 device functions described as follows: 
  Devices can read all of the mandatory SCPI orders. 
  Device is SR1 enabled. 
  Device is RL1 enabled. 
  Device is DT1 enabled. 
4.3 GPIB interface (IT6900(G) series only) 
First, Connect the GPIB interface on the power supply and the GPIB 
card on computer via IEEE488 bus, must be full access and tighten the 
screws. Then set the address, the address range of the power : 0 to 30, 
can set by the function key on the front panel, press the +
  key 
to enter the system menu function, find the GPIB address setting by 
button, type the address, 
key to confirm. GPIB address is 
stored in nonvolatile memory line. 
4.4 RS485 interface 
IT6922B/IT6932B/IT6933B/IT6942B/IT6952B/IT6953B power supply, via the 
RS485 interface, provides multi-unit control function for up to 30 units (If 
connecting more than 10 units, add a 120Ω resistor terminator to the last unit). 
On the front panel, press 
(Shift)+
  keys to enter into the system 
menu, and the related setting is the same as the RS232 communication setting. 
User can set the following parameters of the RS485 interface: 
Baud rate: 9600(4800/9600/19200/38400/57600/115200) 
Parity and data bit: NONE/8BIT, EVEN/8BIT, ODD/8BIT 
EVEN     8 data bits, have even parity   
ODD      8 data bits have odd parity 
NONE     8 data bits, no parity