60
EN
Operating Guide
PSI 8000 2U Series
Date: 28-06-2012
Using the power supply
8. Digital interfaces
8.1 General
The power supply supports various optionally available inter-
face cards for digital or analogue remote control. All cards are
galvanically isolated. Following isolation voltages are given:
•
USB (IF-U1), CAN (IF-C1), RS232 (IF-R1): 2000V DC
•
GPIB (IF-G1): 2000V DC
•
Ethernet (IF-E1b): 1500V DC
•
Extended analogue interface (IF-A1): 2000V DC
Note
Before picking an interface for remote control, consider the
isolation voltage and carefully check if the particular isolation
voltage is sufficient for the target application!
The digital interface cards IF-R1 (RS232), IF-C1(CAN) and IF-
U1(USB) use a uniform communication protocol. Up to 30 units
can be controlled from a PC at once with these cards.
The GPIB interface IF-G1 (IEEE 488) offers a SCPI command
structure for up to 15 units per bus.
The Ethernet/LAN interface IF-E1 also provides SCPI command
set, as well as a browser surface. It features an additional USB
port which makes the device accessible like with the IF-U1 card.
The interface card IF-A1 is an extended analogue interface,
which features a higher isolation voltage than the built-in ana-
logue interface, as well as variable input voltage range and much
more. For more information, please refer to the interface cards
operating guide, which is supplied on the CD that is included
with the interface or available upon request or on our website.
8.2 Configuring the interface cards
If there is interface card equipped, the device will detect it au-
tomatically. The device displays the card with its product code
and article number. Settings can be accessed via the menu
+
Communi
.
Except for the analogue interface card IF-A1 and the Ethernet
card IF-E1B it is necessary to set the unit’s address when using
a digital interface card. Only then the unit can be identified
correctly:
Slot:
{ IF-… }
depends on what is equipped
Device node
Default:
1
= {1..30}
Up to 30 device nodes (addresses) can be as-
signed to devices, one per unit. A device node
must only be assigned once if multiple units are
controlled.
Configuring the various cards
All cards have different parameters to configure. These are
explained in detail in the corresponding operating guide. Please
refer to it
9. Internal analog interface
9.1 General
The internal, 15 pole analog interface is located on the rear and
offers, amongst others, following possibilities:
•
Remote control of current and voltage
•
Remote control of power 0...100% (models from 1kW)
•
Remote monitoring of status (OT, OVP, CC, CV)
•
Remote monitoring of actual values
•
Remotely switching the output on/off
The set value inputs can be operated with either 0...5V or
0...10V. The voltage range is selected in the device setup. The
reference voltage at pin 3 (VREF) depends on the selected
range and will be either 5V or 10V.
Usage instructions:
•
Controlling the device with analog voltages requires to switch
it to remote control with pin „REMOTE“ (5).
•
Before connecting the application that is used to control the
power supply, make sure to wire all cables correctly and
check if the application is unable to input voltages higher
than specified (max. 12V).
•
The input REM-SB (remote standby, pin 13) overrides the
pushbutton
ON
. It means, the output can not be switched on
by the button if the pin defines the output state as „off“, except
local
mode is active. Also see section 6.9.
•
The output VREF can be used to build set values for the
set value inputs VSEL, CSEL and PSEL. For example, if
only current control is required, pin VSEL can be bridged to
VREF and CSEL is either fed by an external voltage (0...5V
or 0...10V) or via a potentiometer between VREF and ground.
Also see next section.
•
Putting in set values up to 10V while 0...5V range is selected
will ignore any voltage above 5V (clipping) and keep the set
value at 100%.
•
Remote control is not possible if the user has switched the
device to U/I/R mode on a model where internal resistance
control is unlocked. The internal resistance set value can not
be controlled by analog interface!
•
The ground of the analog interface are related to minus
output.
9.2 Overview D-Sub socket