Elektro-Automatik PSI 9000 3U Betriebsanleitung Seite 142

PSI 9000 3U Series
• Remote control is not active
In this mode of operation pin "REM-SB" can serve as lock, preventing the DC output from being switched on by
any means. This results in following possible situations:
DC- Pin
+
output „REM-SB"
HIGH
+
LOW
is off
HIGH
+
LOW
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- Pin

output „REM-SB"
HIGH

LOW
is on
HIGH

LOW
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 specification 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.
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.
EA Elektro-Automatik GmbH
Page 54
Helmholtzstr. 31-33 • 41747 Viersen
Germany
Parameter
+
 Behaviour
„Rem-SB"
+
DC output not locked. It can be switched on by pushbutton "On/Off"
normal
(front panel) or via command from digital interface.

+
inverted
DC output locked. It can't be switched on by pushbutton "On/Off"
+
inverted
(front panel) or via command from digital interface. When trying to

switch on, a popup in the display resp. an error message will be
+
normal
generated.
Parameter
+
 Behaviour
„Rem-SB"
+
DC output remains on, nothing is locked. It can be switched on
normal
or off by pushbutton or digital command.

+
inverted
+
DC output will be switched off and locked. Later it can be switched
inverted
on again by toggling the pin. During lock, pushbutton or digital

+
normal
command can delete the request to switch on by pin.
Example with external
voltage source
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
Example with
potentiometers
www.elektroautomatik.de
ea1974@elektroautomatik.de