Elektro-Automatik PSI 9000 DT Series, Руководство по эксплуатации

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Page 56
EA Elektro-Automatik GmbH
Helmholtzstr. 31-37 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
www.elektroautomatik.de
ea1974@elektroautomatik.de
PSI 9000 DT Series
• Analog remote control isn’t 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
output
+
Level on
pin
REM-SB
+
Parameter
„Analog
interface
Rem-SB“

Behaviour
is off
+
HIGH
+
normal

The DC output isn’t locked. It can be switched on by pushbutton
“On/Off” (front panel) or via command from digital interface.
LOW
+
inverted
+
HIGH
+
inverted

The DC output is locked. It can’t be switched on by pushbutton
“On/Off” (front panel) or via command from digital interface. When
trying to switch on, a popup in the display resp. an error message
will be generated.
LOW
+
normal
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
+
Level on
pin
REM-SB
+
Parameter
„Analog
interface
Rem-SB“

Behaviour
is on
+
HIGH
+
normal

The DC output remains on, nothing is locked. It can be switched on
or off by pushbutton or digital command.
LOW
+
inverted
+
HIGH
+
inverted

The 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) Analog 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’s necessary
to consider the input voltage ranges for set values (0...5 V or 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 output values as current and voltage monitor. These can be
read using a standard multimeter or similar.