GW Instek PSB-2000 Series User Manual - Manual (Page 109)

EXTERNAL CONTROL
109
Using the RS-232C Interface
Description  The serial port on a PC or sequencer can be used
for communication through the RS232C
interface. The interface uses CTS-RTS for flow
control. Please note that with this type of
communication, if the flow control fails to work
properly, some characters may be lost, which
may result in a malfunction or error.
Using the Local Bus
Description  The communication timeout time between the
PC and master unit should be longer when the
local bus is used. The communication time is
influenced by the cable length. Check it and
determine the time-out value.
 Remember that when connecting units together
using the local bus connection, any of the local
bus ports on the interface board can be used as
the input or output.
CAUTION A General Description About Communication
When you are going to control several PSB 2000
Series power supply units from a PC, the electrical
potential of the frame of the power supply units
must be equal to that of the PC frame. If those
potentials are different, you may receive electric
shocks or the PC may get damaged.