Knick_P27000_UniversalIsolationAmplifier_Atex
Universal Isolation Amplifiers
VariTrans P 27000
The “Multimeter” among the isolation amplifiers.
With 480 switchable calibrated ranges and broad-range power supply.
The broad-range power supply for all common supply voltages from 20 to 253 V AC/
DC offers maximum flexibility.
To make setting the required input and output ranges simple and user friendly, we offer
a free software tool called VariSoft to support the user. VariSoft shows you the correct
DIP switch position when you enter the
required input and output ranges and it has
an integrated print option for easy
documentation.
You can download VariSoft free of charge
from our website.
The Task
A wide variety of measurement signals
must be reliably galvanically isolated and
converted into standardized signals.
This applies to any input signals from
±20 mV to ±200 V and from ±0.1 mA to
±100 mA.
The Problem
The variety of tasks results in a large number
of different devices.
The Solution
The calibrated switching of the input and
output ranges using DIP switches allows the
Knick VariTrans P 27000 professional universal isolation amplifiers to be used without
complicated readjustment. As switching
occurs without expensive and unreliable
equipment, the devices can also be easily
configured on site.
1
The Housing
At a width of just 12.5 mm, the modular
housing with pluggable screw terminals
allows for simple and fast assembly and
pre-wiring of enclosures.
Housings with fixed screw terminals are also
available for extremely high mechanical
loads.
The easy-to-open housing allows for simple
configuration of the input and output
ranges and provides good protection
against contact and unintentional
adjustment.
The Advantages
The analog transmission of the measurement signal with transformer-based isolation and the digitally
controlled range selection guarantee
almost perfect signal transmission:
– Gain error only 0.08 %
– Excellent pulse formation
– Extremely low residual ripple
– Maximum long-term stability and
reliability
The Technology
A microcontroller monitors the control
element settings and controls the calibrated range selection. Interference
with the signal transmission – due to
contact resistance in the range switch,
for example – is ruled out in this
manner.
Thanks to the VariPower power supplies, the devices can be used internationally with virtually all supply voltages. The extremely low power
consumption and the related minimal
self-heating significantly increase reliability. The result: a 5-year warranty.
The Facts
– Flexible and highly accurate
Calibrated range selection without
time-consuming readjustment
– Broad-range power supply
VariPower 20 ... 253 V AC/DC
–E
xtremely high precision
–S
pecific test report
following EN 10204 2.3
– Extremely compact design
12.5 mm modular housing;
up to 80 active isolators per meter of
mounting rail
– Protective separation according to
EN 61140
Protection against unacceptably
high voltages (for example, with
shunt measurements at high potentials or in 3-phase systems)
– Fast and easy configuration
Easy-to-open housing
–M
aximum reliability
No repair or failure costs
– Pluggable screw terminals
Simple, time-saving assembly and
pre-wiring of enclosures
– 5-year warranty
Warranty
5 years!
Warranty
Defects occurring within 5 years from
delivery date shall be remedied free of
charge at our plant (carriage and
insurance paid by sender).
– 3-port isolation
Protection against incorrect
­measurements or damage
2
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Universal Isolation Amplifiers
VariTrans P 27000
Product Line
Device
Input
Output
VariTrans P 27000
Input and output
adjustable
0 … ±20 mV/200 V
0 … ±0,1 mA/100 mA
0 … 20 mA
4 … 20 mA
0 … 10 V
0 … ±10 V
0 … ±20 mA
VariTrans P 27000
with fixed settings
0 … ±20 mA
0 … ±20 mA
0 … ±60 mV
0 … 60 mV
0 … ±60 mV
0 … ±150 mV
0 … 150 mV
0 … ±150 mV
0 … ±300 mV
0 … 300 mV
0 … ±300 mV
0 … ±500 mV
0 … 500 mV
0 … ±500 mV
0 … ±1 V
0…1V
0 … ±1 V
0 … ±10 V
0 … ±10 V
0 … ±20 mA
0 … ±10 V
0 … ±20 mA
4 … 20 mA
0 … ±10 V
0 … ±20 mA
4 … 20 mA
0 … ±10 V
0 … ±20 mA
4 … 20 mA
0 … ±10 V
0 … ±20 mA
4 … 20 mA
0 … ±10 V
0 … ±20 mA
4 … 20 mA
0 … ±10 V
0 … ±20 mA
0 … ±10 V
Order No.
Order No.
with pluggable
screw terminal
with fixed
screw terminal
VariTrans P 27000
with fixed settings
to customer requirements
Accessories
VariSoft SW 108
Power supply
20 … 253 V AC/DC
3
Adjustment tool for the adjustable
VariTrans P 27000 universal isolation amplifiers
Order No.
Order No.
SW 108
SW 108
Specifications
Input data
Inputs
P 27000 H1/F1: Default setting ±10 V
Voltage configurable from 20 mV to 200 V and switchable in calibrated
increments of 60 mV, 100 mV, 150 mV, 300 mV, 500 mV, 1 V, 5 V, 10 V, 100 V,
uni-/bipolar
Current configurable from 0.1 mA to 100 mA and switchable in calibrated
increments of 1 mA, 5 mA, 10 mA, 20 mA, 50 mA, uni-/bipolar and
4 … 20 mA1)
Input resistance
Current input Ranges ≤ 5 mA Ranges > 5 mA Voltage input Overload capacity
Current input Ranges ≤ 5 mA ≤ 100 mA
Ranges > 5 mA ≤ 300 mA
Voltage input Ranges ≤ 500 mV Limiting by 36 V suppressor diode,
max. allowable continuous current ≤ 20 mA
Ranges > 500 mV Limiting by 250 V suppressor diode,
max. allowable continuous current ≤ 3 mA
approx. 100 ohms
approx. 5 ohms
approx. 1 Mohm
Output data
Output
P 27000 H1/F1: Default setting ±10 V
20 mA, 5 V, 10 V uni-/bipolar and
4 … 20 mA, 1 … 5 V and 2 … 10 V calibrated switching
Offset
–100 %, –50 %, 0 %, 50 %, 100 % span of selected output range, calibrated switching
Load
With output current With output voltage Offset
20 µA or 10 mV
Residual ripple
< 10 mVrms
≤ 12 V (600 ohms at 20 mA)
≤ 10 mA (1 kohm at 10 V)2)
Transmission behavior
Adjustment range
ZERO potentiometer
±25 % span of selected output range
Adjustment range
SPAN potentiometer
0.33 … 3.30 x final value of selected input range (max. Vin = 200 V)
Gain error
< 0.08 % meas.val. (DC)
Cutoff frequency
P 27000 H1/F1: > 10 kHz, < 10 Hz, switchable –3 dB, fixed-range models > 10 kHz, –3 dB
Temperature coefficient3)
< 0.005 %/K full scale (reference temp. 23 °C)
Power supply
Power supply
20 … 253 V AC/DC; AC 48 … 62 Hz, approx. 2 VA; DC approx. 0.9 W
4
Fittings
Sensors
Laboratory Meters
Portable Meters
Process Analytics
Indicators
Isolation Amplifiers
Transmitters
For up-to-date information, please visit www.knick.de
Universal Isolation Amplifiers
VariTrans P 27000
Specifications (continued)
Isolation
Galvanic isolation
3-port isolation between input, output and power supply
Test voltage
5 kV AC input against output; 4 kV AC output against power supply
Working voltage
(basic insulation)
1000 V AC/DC with overvoltage category II and pollution degree 2 according to EN 61010-1.
For applications with high working voltages, ensure there is sufficient spacing or isolation from
neighboring devices and protection against electric shocks.
Protection against electric
shock
Protective separation according to EN 61140 by reinforced insulation according to EN 61010-1.
Working voltages with overvoltage category II and pollution degree 2:
up to 600 V AC/DC across input and output,
up to 300 V AC/DC across output and power supply
up to category II and degree 2
For applications with high working voltages, ensure there is sufficient spacing or isolation from
neighboring devices and protection against electric shocks.
Explosion protection
Europe: II 3G Ex nA IIC T4 Gc X
USA: Class I Div.2 GRP A,B,C,D T4 Class I Zone 2 AEx nA IIC T4
Canada: Class I Zone 2 Ex nA IIC T4 XClass I Div.2 GRP A,B,C,D T4
Standards and approvals
Surge withstand
5 kV, 1.2/50 µs, according to IEC 255-4
EMC4)
EN 61326
Approvals
CUL: cULus Listed, File No. E340287, E308146, E340288
Standard: UL 61010-1 and CAN/CSA C22.2 No. 61010-1
GL: No. 42843-02 HH
KTA:
3507 not in combination with explosion protection
Further data
MTBF5)
Approx. 76 years
Ambient temperature
Operation: Transport and storage: Design
Modular housing, 12.5 mm wide, see dimension drawings for further measurements,
pluggable screw terminals: Type H1
fixed screw terminals: Type F1
Ingress protection
IP 20
Mounting
Metal interlock to attach to 35-mm mounting rail according to EN 50022.
See dimension drawings for conductor cross-section
Weight
Approx. 150 g
–10 … +70 °C
–40 … +85 °C
Input 4 … 20 mA: Offset switching not calibrated
Higher output load upon request
3) Average TC in the specified operating temperature range -10 °C … +70 °C
4) Slight deviations are possible while there is interference
5) Mean Time Between Failures – MTBF – according to EN 61709 (SN 29500). Conditions: Stationary operation in well-kept rooms,
average ambient temperature 40 ºC, no ventilation, continuous operation
1)
2)
5
Block Diagram
V > 500 mV
+
V ≤ 500 mV/
l ≤ 5 mA
+
l > 5 mA
+
250 V
500 pF
Z*
C 1 nF
1 nF
Z 15 V
+
Output
–
1 nF
–
*Z
Input
36 V
6.8 V
≤ 500 mV
≤ 5 mA
Power supply 20 … 253 V AC/DC
Typical Applications
Potential isolation
for safe coupling of the measurement signals to the processing electronics
Transmitter
e.g.
min–1
VariTrans P 27000
±10 V
±10 V
e.g. PLC, PCS
Power supply
Signal conversion or range adjustment
for converting arbitrary measurement signals into standard 10 V or 20 mA signals
VariTrans P 27000
±20 mV to ±200 V,
±0.1 mA to ±100 mA,
0 … 10 V, 0/4 … 20 mA
0 … ±10 V, 0 … ±20 mA
Power supply
6
Fittings
Sensors
Laboratory Meters
Portable Meters
Process Analytics
Indicators
Isolation Amplifiers
Transmitters
For up-to-date information, please visit www.knick.de
Universal Isolation Amplifiers
VariTrans P 27000
Typical Applications (continued)
Simple shunt measurement
e.g. also with free adjustment of overload ranges
VariTrans P 27000
e.g. 1000 A/
60 mV
±90 mV
(with 50 % overload)
±20 mA
e.g. PCS, control room, control panel
Power supply
Potential isolation
for safe coupling of the measurement signals to the processing electronics
Current output
VariTrans P 27000
±20 mA
max. load 50 ohms
±20 mA
Power supply
7
max. load 600 ohms
Dimension Drawings and Terminal Assignments
Housing with pluggable screw terminals
12.5
111
99
Pluggable
screw
terminals
Metal interlock to attach to mounting rail
Terminal assignments
1 Input
+ Current > 5 mA
2 Input
+ Current ≤ 5 mA, voltage ≤ 500 mV
3 Input
+ Voltage > 500 mV
4Input –
5Output +
6Output –
7 Power supplyAC/DC
8 Power supplyAC/DC
Housing with fixed screw terminals
12.5
111
Conductor cross-section max. 2.5 mm2
Multi-wire connection max. 1 mm2
(two wires with equal diameters)
99
Fixed
screw
terminals
Metal interlock to attach to mounting rail
All dimensions in mm
8
Fittings
Sensors
Laboratory Meters
Portable Meters
Process Analytics
Indicators
Isolation Amplifiers
Transmitters
For up-to-date information, please visit www.knick.de
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