32
GMC-I Messtechnik GmbH
•
If remote adjustment of output current is to be accomplished by means
of a potentiometer, wiring can be laid out as shown in figure 7.5.
•
Usi can also be applied as an alternating voltage, for example
in order to superimpose manually selected direct current ISET
with interference signals. To a great extent, the maximum
operating frequency of modulated output current depends
upon the output current value, as well as the voltage
amplitude which results from the prevailing load, and thus
cannot be defined with a simple formula. It is increased as
amplitude is decreased, and as load is increased.
Connection
Figure 7.5
Wiring for Controlling Output Current with External Voltage /
External Potentiometer
Attention!
!
Control inputs Uext +, Uext – and Iext +, Iext – should
only be connected with shielded cable.
Connect the shield to the AGND (1) reference point.
7.6
Voltage Monitoring Output
Function
•
The U MON terminal reads out voltage Umu with reference to
AGND (1), which is proportional to output voltage Uout.
•
U MON serves as a control voltage for master-slave series
connection.
•
However, U MON can also be used for external measuring,
monitoring and recording.
•
The following applies:
Umu = Uout x kmu x kload (kload = 1: 0 ... 10 V 0 ... Uoutnom)
kmu
= 10 V / Uoutnom; U-monitor coefficient
kload
= Rload / (Rload + Ri); load coefficient
Ri(U MON)= 8 k
; U-monitor internal resistance
Rload
= Load resistance (internal resistance of the
measuring instrument)
Uoutnom = 60 V (SYSKON P1500-060-060)
•
Max. error for Umu/kmu (where Rload > 10 M
):
SYSKON P1500:
0.2% Unom
0.4% actual value
SYSKON P3000:
0.3% Unom
0.6% actual value
SYSKON P4500:
0.3% Unom
0.8% actual value
Notes
•
U MON is not a floating output: Its reference point, AGND (1),
is connected to the negative output pole.
•
Connecting grounded measuring circuits to the monitor
output may result in erroneous measurements due to leakage
current or ground loops.
•
The voltage monitoring output makes reference to output
voltage acquired at the sensing leads.
•
The monitor output is short-circuit proof.
Internal resistance is 8 k
.
Connection
Figure 7.6
Voltage Monitor Wiring
7.7
Current Monitoring Output
Function
•
The I MON terminal reads out voltage Umi with reference to
AGND (1), which is proportional to output current Iout.
•
I MON serves as a control voltage for master-slave parallel
connection.
•
However, I MON can also be used for external measuring,
monitoring and recording.
•
The following applies:
Umi = Iout x kmi x kload (kload = 1: 0 ... 10 V 0 ... Ioutnom)
kmi = 10 V / Ioutnom; I-monitor coefficient
kload = Rload / (Rload + Ri); load coefficient
Ri(I MON)= 8 k
; I-monitor internal resistance
Rload
= Load resistance (internal resistance of the
measuring instrument)
Ioutnom = 60 A (SYSKON P1500-060-060)
•
Max. error for Umi/kmi (where Rload > 10 M
):
SYSKON P1500:
0.3% Inom
1.2% actual value
SYSKON P3000:
0.2% Inom
1.2% actual value
SYSKON P4500:
0.167% Inom
1.2% actual value
Notes
•
I MON is not a floating output: Its reference point, AGND (1), is
connected to the negative output pole.
•
Connecting grounded measuring circuits to the monitor
output may result in erroneous measurements due to leakage
current or ground loops.
•
The monitor output is short-circuit proof.
Internal resistance is 8 k
.
Connection
Figure 7.7
Current Monitor Wiring
PSP-KONSTANTER
Einstellung
USET = Usoll
ISET = 0 A
OUTPUT ON
SEtUP/dPYIF/AnIF/AI_I
on
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
Usi
Last
a)
b)
PSP-KONSTANTER
Einstellung
USET = Usoll
ISET = 0 A
OUTPUT ON
SEtUP/dPYIF/AnIF/AI_I
on
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
2k?
Last
REF 02
IN
OUT +5V
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
Usu
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
Usi
+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
V
Rbel
Umu
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
V
Rbel
Umi
Summary of Contents for P1500
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Page 71: ...GMC I Messtechnik GmbH 71 ...
