PST & PSS & PSH SERIES PROGRAMMABLE POWER SUPPLY
PROGRAMMER MANUAL
3
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Turn on at least two-thirds of the devices on the GPIB system while
using the system.
l
Do not use loop or parallel structure for the topology of GPIB
system.
Computer’s Connection
A personal computer with a GPIB card is the essential facilities in order
to operate the programmable power supply via GPIB interface.
The connections between power supply and comput er are following:
I.
Connect one end of a GPIB cable to the computer.
II.
Connect the other end of the GPIB cable to the GPIB port on
the programmable power supply.
III.
Turn on the programmable power supply.
IV.
Turn on the computer.
The GPIB connection testing
If you want to test whether the GPIB connection is working or not, you
can send a GPIB command from computer. For instance, the query
command
*idn?
should return the Manufacturer, model number, serial number and
firmware version in the following format:
GW.Inc,PS T-3202,A00000 0,FW1.00
If you do not receive a proper response from the power supply, please
check if the power is on, the GPIB address is correct, and all cable
connections are active.
PST & PSS & PSH SERIES PROGRAMMABLE POWER SUPPLY
PROGRAMMER MANUAL
4
3. CONNECTING
THE PROGRAMMABLE POWER
SUPPLY
VIA RS232 INTERFACE
The RS 232 interface capabilities:
The RS232 interface provides a point -t o-point connection between two
items of equipment such as a computer and the power supply. There are
some parameters you need to set on the both sides. Once you have set
these parameters, you can control the power supply through the RS232
interface.
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Baud rate: You can set rates of 1200, 2400, 4800 or 9600 baud.
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Parity bit: none.
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Data bit: 8 bits.
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Stop bit: 1 stop bit.
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Data flow control: none.
N otes for RS232 installation
The power supply is a DTE device with a 9-p i n D-type shell RS232
connector located on the rear panel. Figure 1 shows the equipment of
9-pin connector (male) with its pin number assignments. Figure 2 shows
the wiring configuration for DB9 to DB9. When the programmable
power supply is set up with a RS232 interface , please check the
following points :
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Do not connect the output line of one DTE device to the output line
of the other.
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Many devices require a constant high signal on one or more input
pins.
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Ensure that the signal ground of the equipment is connected to the
signal ground of the external device.
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Ensure that the chassis ground of the equipment is connected to the
chassis ground of the external device.
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