36
GMC-I Messtechnik GmbH
7.10
Series Connection
If output voltage from a single KONSTANTER is insufficient, or if
you want to generate a
voltage, the outputs of several
KONSTANTERs can be connected in series.
Warning!
Maximum allowable cumulative voltage for series
connection is 240 V (or 480 V with grounded neutral
point).
7.10.1 Direct Series Connection
Attention!
!
If outputs with differing nominal values are series
connected, the highest selected current value is present
at all outputs in the event of short-circuit. However, the
internal reverse-voltage protection diode is only rated for
nominal current of the respective device (see reverse
voltage withstand under “Electrical Data”). For this
reason, all current setpoints must be set to the lowest
nominal current value of all interconnected devices.
The ILIM parameter is used to select this setting.
Function
•
The easiest way to supply the consumer with more voltage
than is available from a single KONSTANTER
•
Easy wiring
•
Less suitable for constant current regulating mode.
Wiring
Figure 7.10.1a Wiring for Direct Series Connection
Settings
•
Deactivate all outputs.
•
Adjust current setpoint ISET at all series connected
KONSTANTER to approximately the same value:
•
Iset = ISET1 = ISET2 = ISET3 = ... = ISETn
•
Adjust voltage setpoints USET such that they add up to the
desired cumulative voltage value Uset:
•
Uset = USET1 + USET2 + USET3 + ... + USETn
•
Activate the outputs.
Functional Principle
The sum of all individual output voltages is made available to the
power consumer.
If load resistance is continuously reduced, all of the outputs
deliver the same load current at first.
When load current reaches the lowest selected current setpoint
value, current regulating is triggered at the respective output.
If load resistance is further reduced, this output maintains
constant load current until its output voltage has dropped to 0 V.
If even further reduction of load current occurs, the affected
output is forced by the other outputs to generate a negative
voltage. As of approximately –0.5 V, the internal reverse-voltage
protection diode becomes conductive.
Load current can once again climb, until current regulation is
activated at the output with the next higher current setpoint value.
This procedure is continued until load current triggers current
regulating at the output with the highest current setpoint value.
Current is held constant by this last output until short-circuiting
occurs.
Figure 7.10.1b U / I Diagram for Direct Series Connection
Note
The outputs can be activated and deactivated commonly by
connecting the trigger inputs in parallel (see figure 7.10.1a,
optional connection) or series (setting: “SEtUP/dPYIF/AnIF/trG
1 out”).
PSP-KONSTANTER 2
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
Us
- - - - = optionale Senseverbindung
Summary of Contents for P1500
Page 68: ...68 GMC I Messtechnik GmbH ...
Page 71: ...GMC I Messtechnik GmbH 71 ...
