Power Transducer Units - Buffer Amplifier

Active Power Transducer 3 / 4 conductor asymmetrical WMU350

3-phase measuring of active power
Low storekeeping with customer setting of parameter
Accuracy class 1,0
Linear tranlating of measuring data
4-quadrant power calculation
Outputs +/-20mA (4-20mA) and +/-10V (2-10V) simultanous
Potential separated auxilary supply
Hut rail mounting, fitting width 70mm

Download data sheets (.PDF)
WMU350 4-conductor asym. 3 x 231V / 5A

The active power transducer WMU350 is used for 3 or 4-conductor measuring or monitoring of power in power supply units, emergency power supplies and interconnected networks. The output of the power is +/-20mA (+/-10V) or 4-20mA (2-10V). The internal measuring is done by three 4-quadrant multiplicators, with that the reverse power (negative output) will be exactly monitoring and in case of sigal harmonics always the real power will be output. To lower the storekeeping the customer can change the maximum power value ( i.e. 3000W ) by himself below a flap of the housing.

Active Power Transducer (symmetrical) PMU110, PMU150, PMU114, PMU154

One phase recording of the active power with +/-20mA output
Accuracy class 1,0
Reverse power output with negative output values
Calibration acc. to customer specification
Supply via the auxiliary voltage

Download data sheets (.PDF)
PMU110 4-conductor.sym 231/400V IN 1A (GER)
PMU150 4-c.sym 231/400V IN 5A (GER)
PMU114 4-c.sym 231/400V IN 1A (GER)
PMU154 4-c.sym 231/400V IN 5A (GER)
This unit is used for the recording and one-phase measuring of active power of consumers connected in mains and generator systems. The power values measured are output at the +/- 20mA (PMU150) / 4-20mA (PMU154) output. Measurement and evaluation are carried out via a 4-quadrant multiplier, so the correct active power is indicated in each case, even if there is distortion of the currents and voltages fed in.


Rapid Frequency Measuring Transducer FMU100 40 - 70 Hz

Three-way separation (input-output-auxiliary voltage)
Digital transducing with microcontroller
Input 100 - 264VAC, auxiliary voltage 11 - 33VDC
Output 0 - 20 mA or 0 - 10 V
Accuracy class 0,2
Updating of the output value every 20 ms

Download data sheets (.PDF)
FMU100 / 100-264VAC 40-70Hz
This unit is used for the rapid recording of the frequency in AC networks and for analog output as a 0-20mA or 0-10V signal. The 3-way separation allows the unit to be operated at different potentials / reduces possible disturbances between measuring and output circuit. The supply is with 11 - 33VDC. Due to the low self-heating, the transducer can be used up to an environmental temperature of 55°C.


AC Current Transducer (True RMS) AMU110, AMU150

Three-way separation (input-output-auxiliary voltage)
Input AC Current 1A or 5A
Output 0/4-20mA, 0/2-10V simultaneous
Accuracy 1.0%, Auxiliary voltage 11 - 33VDC

Download data sheets (.PDF)
AMU110 Input 1A AC
AMU150 Input 5A AC


AC Voltage Transducer (True RMS) VMU100

Three-way separation (input-output-auxiliary voltage)
Input AC Voltage 0.2 - 400V AC
Output 0/4-20mA, 0/2-10V simultaneous
Accuracy 1.0%, Auxiliary voltage 11 - 33VDC

Download data sheets (.PDF)
VMU100 Input 0,2 - 400V AC 1A


Isolated Buffer Amplifier TRV100 - G014

Matching isolation amplifier between genset GENCON and generator voltage control unit for adaptation of impedance and amplification and in any case for noise-free driving of control unit. A detailed description of function and combined instruction you find the data sheet.

Download data sheets (.PDF)
GENCON Buffer Adapt. Amp. 10 - 34VDC

Isolated Buffer Amplifier TRV100

Three-way potential separation 1000V
Input 0/4-20mA
Output 0/4-20mA and 0/2-10V simultaneously
Universal adjustment on consumer request
16 function ranges selectable internally
Input values up to 400VDC
Accuracy class 1,0

Download data sheets (.PDF)
TRV100 16 ranges aux. 10-34V
GENCON Buffer Adapt. Amp. 10 - 34VDC
Standard - Buffer Amplifier

This buffer amplifier is used for potential separation in measuring circuits in disturbed environments, with ambiguous potentials or as a power driver. Input and output circuits can be switched over internally to 0-20mA, 4-20mA, 0-10V and 2-10V. On customer request, the unit can be calibrated to input voltages up to 0-400V.

Buffer Amplifier for Generator Control Appliance

For measuring of impedance or for potential separation on voltage- or frequency control units the versionTRV100-G014 will be offer especially for GENCON control unit. More details please see following description.


Front-adjustable Isolated Buffer Amplifier FTV924, FTV230, (discontinued: FTV024, FTV115)

Three-way potential separation 3.75kV
Input 0/4 - 20mA, 0/4 - 5/10V
Output 0/4 - 20mA, 0/2 - 10V
Operating mode switchover and recalibration on front
Accuracy < 1%
Temperature range -20 to 55°C
Various auxiliary voltage ranges

Download data sheets (.PDF)
FTV924 aux. 20,4 - 27,6 VDC
FTV230 aux. 196 - 264 VDC
FTV115 aux. 98 - 132 VDC
FTV024 aux. 20,4 - 27,6 VDC
The buffer amplifier FTV... is a universal buffer amplifier configuration and adjustment of which are possible on the front panel. The unit is suitable for all standard applications in the range 0-20mA, 0-5V and 0-10V and also includes the transformation of the signals, for example 0-20mA to 4-20mA and vice versa. The unit includes a 3-way potential separation of 3.75kV, a prcision of < 1% and low temperature drift (can be used up to 55°C)


DC-Power Measuring Transducer PDM500

Analog multiplicationwith a accuracy of 1%
Potentialfree impulse output for counting inputs
Potentialfree supply voltage of 10 - 33VDC
Low power consumption appr. 1.5W
Current input for shunt-resistor of 60mV-type
Specific customer calibrations possible
Platzsparendes Hutschienengehäuse 22,5mm
Small hut rail case with 22.5mm

Download date sheets (.PDF)
PDM500 0-500V, current input 60mV
with pulse output
231 VAC and 24 VDC aux. voltage
DC measuring transducer PDM500 calculates the real power of a DC voltage source, i.e. of a solar cell plant and transduces the voltage and current values into impulses / kWh to its output. The pulses will be counted and calculated by succesive units. The current value will be taken from a suitable power shunt resistor with a rated voltage of 60mV. The maximum voltage range is 500V, but will be reduced to the customers specification to achieve maximal possible accuracy.

Download date sheets (.PDF)
PDM52S 0-500V, current input 60mV
with pulse output
2 analog outputs 4 mA and 10 V
24 VDC aux. voltage
DC measurement transducer PDM52S gets the same properties than PDM5000 but have got 2 additional analog outputs 0/2 - 10 V and 0/4 - 20 mA. All outputs can work simultanous to enable more possibilities on the output site. You can i.e. show the solar-power on 20 mA analogue measurement meter, connect an digital meter to the 10 V output to analyze the kWh-power with counting accuracy.

Download date sheets (.PDF)
PDM52S 0-500V, current input 60mV
2 analog outputs 4 mA and 10 V
24 VDC aux. voltage
DC measurement transducer PDM520 gets the same properties than PDM5000 but instead pf the pulse output it has 2 additional analog outputs 0/2 - 10 V and 0/4 - 20 mA. the outputs can work simultanous. With this you have 2 analogue possibilities for the output of solar-power i.e. to an analogue 20 mA meter or to a digital meter with a range of 10 V.


DCPower Measuring Transducer PDM100, PDM110, PDM200 (discontinue)

Application: power measurement in solar plants
Real power measurement with pulse output to optocoupler
Current input for 60mV shunt resistor
Current input 10-50V, 21-250V and 55-700V depending on the type
Auxiliary voltage from input voltage
Low own consumption, for example 6mA at 700V
Accuracy < 2%
Temperature range -10 to 35°C
Individual calibration

Download Datenblätter (.PDF)
PDM100 21-250 VDC, current 60mV
PDM110 10-50 VDC, current 60mV
PDM200 55-700 VDC, current 60mV
The PDM measuring transducer records the power of a DC power supply and sends the value measured to the optocoupler output with potential separation in the form of pulses per kWh. Normal output pulse values are 1000 or 10,000 pulses per kWh. The voltage input receives the measuring and supply voltage, whereas the current input receives the maximum measuring voltage of 60mV from a shunt resistor. Current and voltage are at one and the same potential here. Depending on the shunt resistor used, any desired currents can be measured. Maximum current, calibrating voltage and pulse rate are required for calibrating the unit.