Instrument Introduction 
  Copyright ©ITECH Electronic Co., Ltd. 16 
External control 
interface CTRL 
This interface is used for the parallel connection 
between the master (with
 
operation panel) and the slaves (without 
operation 
panel). Connect the interface 
on the rear panel of each unit to be connected 
in parallel, and the master can offer 
synchronous control over the power
-
USB communication interface. 
Used for communication between instruments in 
parallel operation feature. 
 
Used to connect AC power to start instrument.