Knick VariTrans P 2900x P2 User manual

VariTrans® P 2900x P2
High-Voltage Isolation Amplifiers
www.knick.de

32
Warranty
Warranty
Defects occurring within 5 years from delivery date shall be remedied
free of charge at our plant (carriage and insurance paid by sender).
Accessories: 1 year.
Subject to change without notice.
Return of products
Please contact our Service Team before returning a defective device
(see back cover for contact details).
Ship the cleaned device to the address you have been given.
Disposal
Please observe the applicable local or national regulations concerning
the disposal of“waste electrical and electronic equipment”.
The materials and manufacturing processes are RoHS compliant.

33
Table of Contents
Warranty.........................................................................................32
Safety Information .......................................................................34
Intended Use .................................................................................35
Function .........................................................................................36
Mounting and Electrical Connection........................................37
Control Elements (Face Plate) ....................................................38
Status Signaling............................................................................38
Test Jacks........................................................................................39
Input Ranges .................................................................................40
Output Ranges..............................................................................42
Typical Input Configurations......................................................43
Typical Output Configurations ..................................................44
Characteristic Curves...................................................................46
Specifications................................................................................48
Input data .............................................................................................48
Output data..........................................................................................49
Transmission behavior.....................................................................49
Power supply.......................................................................................50
Isolation.................................................................................................51
Standards and approvals ................................................................52
Further data .........................................................................................53
Product Line ..................................................................................54
Accessories.....................................................................................55

34
Caution!
Be sure to take protective measures against electrostatic
discharge (ESD) when handling the devices!
Warning!
Protection against electric shock
For applications with high working voltages, ensure there
is sucient spacing or isolation from neighboring devices
and protection against electric shocks.
Caution!
The VariTrans® P2900xP2 high-voltage isolation ampliers must be in-
stalled only by qualied and specially trained personnel authorized by
the operating company. Do not connect the device to power supply
before it is professionally installed. Do not change the measuring
range during operation.
Observe the national codes and regulations during installation and
selection of cables and lines.
Safety Information
Be sure to install a two-pole circuit breaker between
device and mains supply.
Prior to commissioning and after each change of the conguration,
you must check the intended function of the isolation amplier.

35
The VariTrans® P2900xP2 high-voltage isolation ampliers are
designed for input voltages up to 1000VDC. The calibrated range
selection is performed using DIP switches.
The input signal is reproduced as a 0/4…20mA or 0…10V standard
signal or as a bipolar signal in the –20 ... 20 mA or –10... 10 V range at
the output.
A potentiometer can be connected to adjust the zero point in the
range ±5%.
The device provides galvanic 3-port isolation.
Intended Use
5.2
6.2
5.3
6.3
U = 3.3
I = 3.1
3.2
1.1 1.2
+
+
-
-
+
-
Input Output
(short-circuit /
idle proof)
Block diagram
Power supply
(protected against inverse polarity,
the polarity has no effect when
operated with direct voltage)

36
The input signal is converted into a pulse-width modulated signal
and is transferred to the primary side of a transformer. On the second-
ary side the pulse-width signal is converted back into an impressed
current or an impressed voltage.
3-port isolation with protective separation up to 600 V AC/DC
according to EN 61140 ensures optimum protection of personnel and
equipment as well as unaltered transmission of measuring signals.
Easy scalability supports customized solutions; optimally adapted to
the respective application, up to 192 tailor-made signal combinations
can be implemented in one device.
Function
3-port isolation of inputs, outputs and power supply
Inputs
Outputs
Power supply
Warning!
For applications with
high working voltages,
ensure there is su-
cient spacing or isola-
tion from neighboring
devices and protection
against electric shocks.
Basic insulation acc. to
DINEN61010-1:2001 for
circuits of CAT II and CAT III
Working voltage
CAT II: 1000 V AC/DC
CAT III: 1000 V AC/DC
Double insulation acc. to
DIN EN61010-1:2001 for
circuits of CAT II and CAT III
Working voltage
CAT II: 600 V AC/DC
CAT III: 300 V AC/DC
5.2
6.2
5.3
6.3
1.1 1.2
3.2
U = 3.3
I = 3.1

37
The devices are snapped onto TS 35 standard rails and
laterally xed by suitable end brackets.
See dimension drawing for terminal assignments.
Conductor cross-section: 0.2 mm2... 2.5 mm2(AWG 24-12).
Mounting and Electrical Connection
Terminal assignments and dimensions
17,5
114,5
99,0
5.1 5.2 5.3
6.1 6.2 6.3
3.3 3.2 3.1
1.3 1.2 1.1
Power supply* Power supply* Not connected
Current output**
(passive/active)
GND output Voltage output**
Not connected Input, positive Input, positive
Not connected Input, negative Input, negative
* The polarity has no effect when operated with direct voltage
** The signal outputs are short-circuit and idle proof
Note: All dimensions in mm

38
Alarm LED (red), flashes momentarily at power-on
Status LED (green)
Potentiometer (output offset, max. ± 5 %)
Switch S1
Switch S1 Function (factory setting bold print)
Input range
Output range
Switch S2 ON OFF
Output, active Output, passive
Voltage output Current output
Output inverted Output not inverted
Cuto frequency 10 Hz Cuto frequency 10 kHz
Oset pot active Calibrated range
Control Elements (Face Plate)
Switch S2
Status Signaling
Green LED: Supply voltage provided
Red LED: Error: Check load. If the error cannot be remedied,
send in the device for repair.
Note: The red LED ashes momentarily at power-on to
signal that load monitoring is functioning properly.
The warning sign means: read manual.

39
Test Jacks
The VariTrans® P2900x P2 high-voltage isolation ampliers provide
test jacks which are located above the connecting wires of the
respective signal terminal (see image). This allows simple function
check or signal tracing.
Warning!
Protection against electric shock
For applications with high working voltages, ensure there
is sucient spacing or isolation from neighboring devices
and protection against electric shocks.
Be sure to use suitable high-voltage test prods with
sucient protection against shock hazards!

40
Input Ranges
No. Input range Switch Input
resistance
Input
terminals
Bipolar Unipolar
Input ranges P 29000 P2/0x (Factory setting: Range 1)

41
Input Ranges
No. Input range Switch Input
resistance
Input
terminals
Bipolar Unipolar
Input ranges P 29001 P2/0x (Factory setting: Range 1)

42
Output Ranges
No. Input Output,
active
Output,
passive
S1:
5 ... 6
S2:
1 ... 3
Output
terminals
Unipolar
Unipolar
Unipolar
Unipolar
Unipolar
6 Unipolar
7 Bipolar
8 Bipolar
9 Bipolar
10 Bipolar
11 Bipolar
12 Bipolar
Output ranges P 2900x P2/0x (Factory setting: Range 1)

43
Typical Input Configurations
Shunt voltage measurement
Voltage measurement Voltage measurement

44
Typical Output Configurations
Current output, active
Voltage output
The voltage measurement shown here
serves for load control
Test jack
Terminal
Optional voltage
measurement
Legend
Optional current
measurement
(only DC currents can be
measured correctly)

45
Typical Output Congurations
Current output, passive,
for supply voltages up to 12 V
Current output, passive,
for supply voltages 12 ... 26 V
0 ... 12 V 12 ... 26 V
The device is congured for“Passive output” (unipolar/bipolar):
S2-1 Voutput Behavior with missing power supply
ON 14 V The externally controlled output current rises to approx. 57mA,
the red LED is glowing slightly.
OFF 24 V The externally controlled output current rises to approx. 28mA.
Test jack
Terminal
Optional voltage
measurement
Legend
Optional current
measurement
(only DC currents can be
measured correctly)

46
Characteristic Curves
Transfer characteristic with indication of the adjustable oset. Up to
105% input span the amplier operates linearly with full accuracy.
Transfer characteristic with adjustable RangeLimit
(min, special version) and adjustable oset

47
Characteristic Curves
Inverting transfer characteristic with adjustable RangeLimit
(max, special version) and adjustable oset
Built-in full-wave rectier with absolute-value function
(V-shape curve, special version) and adjustable oset

48
Specifications
Input data (voltage)
Input range max. ±1000 V DC
Overload capacity
(permanent)
0 ... 1 V max. ± 30 V
1 ... 100 V max. ± 500 V
100 ... 500 V max. ± 600 V
500 ... 1000 V max. ± 1200 V
Input resistance 0 ... 1 V approx. 10 k
1 ... 100 V approx. 400 k
100 ... 500 V approx. 2 M
500 ... 1000 V approx. 4 M
Open-circuit detection
(special version)
< 300 µA

49
Specications
Output data
Output, active 0/4 … 20 mA or 0 … 10 V, resp., or
–20 … 20 mA or –10 … 10 V, resp.
Output, passive 4 … 20 mA
Max. load (current) active ≤ 12 V (600  at 20 mA)
passive 12 ... 26
Max. load (voltage) ≤ 10 mA (1 k at 10 V)
Overload capacity with
externally applied voltage
± 30 V
Displacement up to ±150 % as default
Overload range Current output: > 22 mA (max. 26 mA)
Voltage output: < 15 V
Oset adjustment ±5 %
Residual ripple < 10 mV rms
Voltage drop when mea-
suring the output current
at test jacks 3.1 and 3.3
max. 150 mV
Transmission behavior
Gain error Input ≤ 1 V ≤ 0.1% meas.val.
Input > 1 V ≤ 0.2 % meas. val.
Oset ≤ 0.1 % input range (full scale)
Linear dynamic range –5% to 105% of input span
Signaling of load error Red LED on the front
Response time T99 * < 200 ms or < 200 µs, switchable
Cuto frequency 10 Hz or 10 kHz, switchable
*) Time after change of input value until reaching an output value
of 99 % steady state

50
Specications
Common mode rejection
Input range ≤ 1 V
CMRR1
T-CMRR2
appr. 150 dB (DC/AC: 50 Hz)
appr. 100 dB (1000 V, tr= 1 s)
Common mode rejection
Input range > 1 V
CMRR1DC: approx. 150 dB
AC 50 Hz: approx. 120 dB
Temperature inuence3Input ≤ 1 V < 50 ppm/K full scale
Input > 1 V < 80 ppm/K full scale
Power supply
P2900xP2/00 24 V DC +/–25 %
P2900xP2/01 20 ... 230 V AC/DC ±10 %;
AC: 45 Hz to 440 Hz
Power consumption 1.5 W
1 Common-Mode Rejection Ratio =
differential voltage gain : common-mode voltage gain
2Transient Common-Mode Rejection Ratio =
differential DC gain : common-mode transient peak value gain
3Reference temperature for TC specifications = 23 °C, average TC