User manual

Page 58
PSI 9000 2U Series
www.elektroautomatik.de
[e-mail]
EA Elektro-Automatik GmbH
Helmholtzstr. 31-33 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
In case the DC output is already switched on, toggling the pin will switch the DC output off, similar to what it does
in analog remote control:
DC-
output

Pin
„REM-SB“
+
Parameter
„Rem-SB“

Behaviour
is on

HIGH
+
normal

DC output remains on, nothing is locked. It can be switched on
or off by pushbutton or digital command.
LOW
+
inverted

HIGH
+
inverted

DC output will be switched off and locked. Later it can be switched
on again by toggling the pin. During lock, pushbutton or digital
command can delete the request to switch on by pin.
LOW
+
normal
b) Remote control of current and power
Requires remote control to be activated (Pin “Remote” = LOW)
The set values PSEL and CSEL are generated from, for example, the
reference voltage VREF, using potentiometers for each. Hence the
power supply can selectively work in current limiting or power limit-
ing mode. According to the specication of max. 5 mA for the VREF
output, potentiometers of at least 10 kΩ must be used.
The voltage set value VSEL is directly connected to VREF and will
thus be permanently 100%.
If the control voltage is fed in from an external source it is necessary to
consider the input voltage ranges for set values (0...5 V oder 0...10 V).
Use of the input voltage range 0...5 V for 0...100%
set value halves the effective resolution.
Example with external
voltage source
Example with
potentiometers
c) Reading actual values
The AI provides the DC input values as current and voltage monitor. These can be read
using a standard multimeter or similar.