Sample Applications - Elektro-Automatik EL 9080-600 Bedienungsanleitung

Handling the device
8.3

Sample applications

Overview of the pins
AGnd RSEL
DGnd
PSEL
Remote CSEL
Rem-SB VSEL
OVP/OT
Trigger In VMON
R-Range CMON
R-active VRef
Figure 16
Master-Slave operation, simulated
A true Master-Slave is not possible because the analogue
interface does not provide set value outputs. But the monitor
outputs CMON or, in some cases, even VMON of the master
can be used to control at least one of the four set value inputs
of one or multiple slave loads.
CMON
AGnd
DGnd PSEL
Figure 17
Since there is no power monitor output, the PSEL input(s)
can't be controlled by the master. But it could be directly tied
to VREF output or via a potentiometer, in order to adjust
the power between 0% and 100%. The inputs Remote and
R-active have to be tied to GND at the slave(s) in order to
activate the external control.
Input off
Figure 18 shows the wiring of the analogue interface for
remotely switching the input off. This feature can be used
anytime and does not require the activation of external control
by pin Remote. It can be combined with other applications
and can be realised by various contacts, like transistors,
REM-SB DGND
Figure 18
© 2008, Elektro-Automatik GmbH & Co. KG
REM-SB DGND
Master
Slave
REMOTE DGND
Switching to external control
Switching to external control is only required if the device is
going to be controlled by external analogue signals. If using
the simulated master-slave operation, only the slave(s) have
to be switched to external control. The switch-over is realised
with either a relay or a switch etc.
REMOTE DGND
Figure 19
External control with current and power
The example in figure 20 shows potentiometers, one each for
the set value of power and current, which are referenced to
VREF (10V) and AGND. With this you can arbitrarily adjust
current and power between 0% and 100%.
DGND
VREF
CSEL
AGND
10k
PSEL
Figure 20
External control with current only
Like in the example above, but only current adjustable. The
power is set to maximum.
DGND
VREF
CSEL
AGND
10k
Figure 21
EN
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