Elektro-Automatik PS 9000 T Series, Руководство по эксплуатации

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Page 53
EA Elektro-Automatik GmbH
Helmholtzstr. 31-33 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
www.elektroautomatik.de
ea1974@elektroautomatik.de
PS 9000 T 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
output
+
Pin
„REM-SB“
+
Parameter
„Rem-SB“

Behaviour
is off
+
HIGH
+
normal

DC output not locked. It can be switched on by pushbutton “On/Off”
(front panel) or via command from digital interface.
LOW
+
inverted
+
HIGH
+
inverted

DC output 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

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 com-
mand 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 po-
tentiometers for each. Hence the power supply can
selectively work in current limiting or power limiting
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).
Example with
external voltage
source
Example with
potentiometers
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 output values as current and voltage monitor. These can be
read using a standard multimeter or similar.