GW Instek PSM-Series Programming Manual - Manual (Page 5)

PSM SERIES PROGRAMMABLE POWER SUPPLY
PROGRAMMER MANUAL
⎯ 7 ⎯
Figure 2 Wiring configuration for DB9 to DB9
Computer’s Connection
A personal computer with a COM port is the essential facilities in order to
operate the programmable power supply via RS232 interface.
The connections between power supply and computer are as follows:
I. Connect one end of a RS232 cable to the computer.
II. Connect the other end of the cable to the RS232 port on the
programmable power supply.
III. Turn on the programmable power supply.
IV. Turn on the computer.
The RS232 connection testing
If you want to test whether the RS232 connection is working or not, you can
send a command from computer. For instance, using a terminal program
send the query command.
EQUIPMENT
(DB9, DTE)
COMPUTER
(DB9, DTE)
Pin2
Pin3
Pin5 Pin5
Pin3
Pin2
PSM SERIES PROGRAMMABLE POWER SUPPLY
PROGRAMMER MANUAL
⎯ 8 ⎯
*idn?
should return the Manufacturer, model number, serial number and firmware
version in the following format:
GW.Inc,PSM-2010,A000000,FW1.00
If you do not receive a proper response from the power supply, please check
if the power is on, the RS232 baud rate are the same on both sides, and all
cable connections are active.
4. INPUT AND OUTPUT QUEUE
The design of 128 bytes input queue and 128 bytes output queue for
storing the pending commands or return messages is to prevent the
transmitted commands of remote control and return messages from missing.
As the maximum stored capacity for Error/Event Queue is 20 groups of
messages, it should be noted that input data exceeding the capacity by using
these buffers will cause data missing.