Example Applications - Elektro-Automatik EL 9000 A Bedienungsanleitung

Remote control
8.3 Example applications
Overview of the pins
AGnd
DGnd
Remote
Rem-SB
OVP/OT
Trigger In
R-Range
R-active
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.
REM-SB
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 Re-
mote 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, relays, switches etc. Opening the contact
again will either switch the output on if it was on before
switching off (remote control) or enable switching it on
again manually on the front panel.
46
Date: 11-16-2011
RSEL
PSEL
CSEL
VSEL
VMON
CMON
VRef
Master
DGND
CMON
Slave
REM-SB DGND
Figure 18
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.
Important! All set values have to be given, except the
resistance set value which is only required if resistance
control is activated. Set values can also be bridged to
pin VREF for 100%.
REMOTE
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%. Voltage set value VSEL and signal R-active tied
to 0V here for correct operation.
DGND
VREF
CSEL
10k
PSEL
Figure 20
EN
DGND
AGND
Instruction Manual
EL 9000 A Series
REMOTE D