Analogue Interface; General; Application Examples - Elektro-Automatik PS 8000 2U Bedienungsanleitung

Operating the device

10. Analogue interface

10.1 General

The integrated, non-isolated, 15 pole analogue interface (AI) is
located on the rear and offers following main features:
• Remote control of output current and voltage
• Remote control of output power (only models from 1kW)
• Remote monitoring of status (OT, OVP, CC, CV)
• Remote monitoring of actual values
• Remotely switching the output on/off
The analogue interface (short: AI) allows to remotely control
current, voltage and power (models from 1kW) of the power
supply, but always in combination. It means, that it's not possible
to adjust voltage via the AI and the current with the rotary knob
on the front at the same time, or vice versa. Models below 1kW
output power don't require the power set value PSEL and thus
it must not be given.
The OVP threshold can not be adjusted via the AI, so it's re-
quired to set it manually on the device before using the remote
control. Switching to preset mode with the preset buttons shows
the translated set values, that are put into the set value pins of
the AI as voltages. In order to put in appropriate set values, the
user can either use an external voltage source or the reference
output voltage on pin 3.
The AI can be operated with the common 0...5V or 0...10V
ranges, each corresponding to 0...100% nominal values. The
desired control voltage range is selected in the device setup (see
section „8. Device setup"). The reference voltage at output pin
3 is related to the chosen setting and will be either 5V or 10V.
Following applies:
0-5V: Reference voltage = 5V, 0...5V set value voltage corre-
spond to 0...100% nominal value, 0...100% actual value cor-
respond to 0...5V at the actual value outputs (CMON, VMON).
0-10V: Reference voltage = 10V, 0...10V set value voltage cor-
respond to 0...100% nominal value, 0...100% actual value cor-
respond to 0...10V at the actual value outputs (CMON, VMON).
Putting in set values that exceed the limit, for example >5V
while the 0...5V range is selected, is intercepted by clipping the
corresponding set value to 100%.
Usage instructions:
• Controlling the device with analogue 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 leads correctly and check
if the application is unable to put in voltages higher than
specified (max. 12V).
• The input REM-SB (remote standby, pin 13) overrides the
pushbutton Output On. It means, the output can not be swit-
ched on by the button if the pin defines the output state as „off"
, except LOCAL mode is active. This mode locks all interface
from access to the device. Also see „6.2.7 Pushbutton Local".
• The grounds of the analogue interface are related to
minus output.
Instruction Manual
PS 8000 2U Series

10.2 Application examples

Pin overview
Attention!
Never connect grounds of the analogue interface to mi-
nus (negative) output of an external control application
(PLC, for example), if that control application is otherwise
connected to the neative power supply output (ground
loop). Load current may flow over the control leads and
damage the device!
Figure 7
Figure 8
Date: 02-09-2012
EN
43