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GMC-I Messtechnik GmbH
7.9
Parallel Connection
If output current from a single KONSTANTER is insufficient for the
respective application, the outputs of any number of
KONSTANTERs can be parallel connected.
Attention!
!
If outputs with different nominal voltages are parallel
connected, all outputs must be limited to the lowest
utilized nominal voltage value. The ULIM parameter is
used to select this setting.
7.9.1
Direct Parallel Connection
Function
•
Easiest way to provide the consumer with more current than
is available from a single r KONSTANTER.
•
KONSTANTERs with differing nominal output voltages can be
used. However, all voltage setpoints must be set or limited to
the same value.
•
This setup is less suitable for the constant voltage regulating
mode.
Wiring
Figure 7.9.1a Wiring for Direct Parallel Connection
Settings
•
Deactivate all outputs.
•
Adjust voltage setpoint USET at all parallel connected
KONSTANTER to approximately the same value:
•
Uset = USET1 = USET2 = USET3 = ... = USETn
•
Adjust current setpoints ISET such that they add up to the
desired cumulative current value Iset:
•
Iset = ISET1 + ISET2 + ISET3 + ... + ISETn
•
Activate the outputs.
Functional Principle
•
After switching the outputs on, load current is initially supplied
by the KONSTANTER with the highest voltage setting.
•
If load resistance is continuously reduced, load current is
continuously increased.
•
When load current reaches the ISET value selected for the
output which is momentarily supplying power to the
consumer, current limiting is activated at this output.
•
If load resistance is further decreased, current regulation
reduces output voltage until the voltage value of the output
with the next lower setting is reached.
•
As of this point in time, this KONSTANTER also supplies a
portion of the load current.
•
This procedure is continued until load current triggers current
regulating at the output with the lowest voltage setting when
the setpoint value for cumulative current is reached.
•
This output maintains constant load current until the load
resistor is short-circuited.
Figure 7.9.1b U / I Diagram for Direct Parallel Connection
Notes
•
Slightly varying voltages occur at the individual outputs as a
result of setting tolerances.
•
In the event of larger voltage differences, an electronic sink is
activated at the outputs with lower voltage settings.
•
The sink controller attempts to reach the lower voltage value
by limiting power consumption.
•
Neither the KONSTANTERs nor the power consumer are
damaged as a result.
•
If problems occur with the measurement of load current, the
KONSTANTERs should be linked by means of master-slave
parallel connection.
•
The outputs can be activated and deactivated commonly by
connecting the trigger inputs in parallel (see figure 7.9.1a,
optional connection) or series (setting: “SEtUP/dPYIF/AnIF/
trG-1 out”).
PSP-KONSTANTER 3
Einstellung
USET = Usoll
ISET 1
OUTPUT ON
(SEtUP/dPYIF/AnIF/trG-1
out
)
Analog Interface
TRG 1 +
1
TRG 1 -
2
TRG 2 +
3
TRG 2 -
4
SIG 1 +
5
SIG 1 -
6
SIG 2 +
7
SIG 2 -
8
SIG 3 +
9
AGND 2
10
+15V 11
AGND 1
12
Uext +
13
Uext -
14
Iext +
15
Iext -
16
U MON
17
I MON
18
SENSE +
19
SENSE -
20
+OUT
- OUT
optional
PSP-KONSTANTER 1
Einstellung
USET = Usoll
ISET 3
OUTPUT ON
(SEtUP/dPYIF/AnIF/trG-1
out
)
Analog Interface
TRG 1 +
1
TRG 1 -
2
TRG 2 +
3
TRG 2 -
4
SIG 1 +
5
SIG 1 -
6
SIG 2 +
7
SIG 2 -
8
SIG 3 +
9
AGND 2
10
+15V 11
AGND 1
12
Uext +
13
Uext -
14
Iext +
15
Iext -
16
U MON
17
I MON
18
SENSE +
19
SENSE -
20
+OUT
- OUT
Last
PSP-KONSTANTER 2
Einstellung
USET = Usoll
ISET 2
OUTPUT ON
(SEtUP/dPYIF/AnIF/trG-1
out
)
Analog Interface
TRG 1 +
1
TRG 1 -
2
TRG 2 +
3
TRG 2 -
4
SIG 1 +
5
SIG 1 -
6
SIG 2 +
7
SIG 2 -
8
SIG 3 +
9
AGND 2
10
+15V 11
AGND 1
12
Uext +
13
Uext -
14
Iext +
15
Iext -
16
U MON
17
I MON
18
SENSE +
19
SENSE -
20
+OUT
- OUT
Us
Summary of Contents for P1500
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