User manual

20 GMC-I Gossen-Metrawatt GmbH
5.6 Voltage Monitoring Output
Function
• The U-MON terminal, with reference to AGND, supplies a voltage
U
MU
which is proportional to Uout.
• U-MON is used as a control voltage for series master-slave
connection (see 5.9.2).
• U-MON can also be used for external measuring, monitoring and
recording purposes.
• The following applies:
U
MU
= Uout ⋅ k
MU
⋅ k
load
= 0 ... 10 V
k
MU
= 10 V / Uout
nom
, U monitor coefficient
R
i (U-MONITOR)
= 9.8 kΩ, U monitor internal resistance
Load Coefficient
R
load
= load resistance
Max. error, U
MU
: ± 5 mV ± 2% actual value (where R
load
> 10 MΩ)
Notes
• U-MON is not potential-free, its reference point AGND is
connected to the negative pole of the output.
• Connecting grounded measuring circuits to the monitoring output
may lead to erroneous measurements due to leakage current or
earth loops.
• The voltage monitoring output makes reference to output
voltage acquired by the sensing leads (see chapter 2.3).
• The monitoring output is short-circuit proof.
– Internal resistance is equal to 9.8 kΩ.
Figure 5.6 Voltage Monitor Wiring
5.7 Current Monitoring Output
Function
• The I-MON terminal with reference to AGND supplies a current U
MII
which is proportional to Iout.
• I-MON is used as a control voltage for parallel master-slave
connection (see 5.8.2 and 5.8.3).
• I-MON can also be used for external measuring, monitoring and
recording purposes.
• The following applies:
U
MI
= Iout ⋅ k
MI
⋅ k
load
= 0 ... 10 V
k
MI
= 10 V / Iout
nom
, I monitor coefficient
R
i (I MONITOR)
= 9.4 kΩ, I monitor internal resistance
Load Coefficient
R
load
= load resistance
Max. error, U
MI
: ± 5 mV ± 2% actual value (where R
load
> 10M Ω )
Notes
• I-MON is not a potential-free, its reference point AGND is
connected to the negative pole of the output.
• Connecting measuring current circuits to the monitoring output
may lead to erroneous measurements due to leakage current or
earth loops.
• The monitoring output is short-circuit proof.
– Internal resistance is equal to 9.4 kΩ
Figure 5.7 Current Monitor Wiring
k
load
R
load
R
load
9.8 kΩ+
---------------------------------------=
SLP-KONSTANTER
+SENSE
+OUT
-OUT
-SENSE
Analog Interface
SIG1 OUT
SIG2 OUT
TRG IN +
TRG IN -
+ 15 V
AGND
Uset -
Uset +
Iset +
U-MON
I-MON
Uout
Load
I
out
Settings
USET = Uset
ISET = Iset
OUTPUT on/off
-OUT
+OUT
V
U
MU
+
OUTPUT
R
load
k
load
R
load
R
load
9.4 kΩ+
---------------------------------------=
SLP-KONSTANTER
+SENSE
+OUT
-OUT
-SENSE
Analog Interface
SIG1 OUT
SIG2 OUT
TRG IN +
TRG IN -
+ 15 V
AGND
Uset -
Uset +
Iset +
U-MON
I-MON
Settings
USET = Uset
ISET = Iset
OUTPUT on/off
-OUT
+OUT
U
out
Load
I
out
V
R
load
U
MI
+
OUTPUT