User manual

42
© 2006, Elektro-Automatik GmbH & Co. KG
Irrtümer und Änderungen vorbehalten
EN
© 2008, Elektro-Automatik GmbH & Co. KG
8.3 Sample applications
Overview of the pins
Rem-SB
Remote
DGnd
AGnd RSEL
PSEL
CSEL
VSEL
VRefR-active
R-Range
Trigger In
VMON
CMON
OVP/OT
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.
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,
relays, switches etc.
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.
External control with current and power
Theexampleingure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%.
External control with current only
Like in the example above, but only current adjustable. The
power is set to maximum.
VREF
AGND
CSEL
10k
DGND
PSEL
Figure 20
VREF
AGND
CSEL
10k
DGND
Figure 21
AGnd
CMON
DGnd PSEL
Master
Slave
Figure 17
DGNDREM-SB
DGNDREMOTE
Figure 18
DGNDREM-SB
DGNDREMOTE
Figure 19
Handling the device