Elektro-Automatik 35 320 200, Инструкция по эксплуатации

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39
Instruction Manual
EL 3000 A Series
EN
Date: 05-30-2017
Remote control
8.3 Sample applications
Overview of the pins
Rem-SB
Remote
DGnd
AGnd RSEL
PSEL
CSEL
VSEL
VRef R-active
R-Range
Trigger In
VMON
CMON
OVP/OT
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 moni-
tor 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.
AGnd
CMON
DGnd PSEL
Master
Slave
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.
DGND REM-SB
DGND REMOTE
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%.
DGND REM-SB
DGND 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.
VREF
AGND
CSEL
10k
DGND
PSEL
Figure 20