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CF measuring amplifier MBI 50.25.

1-channel carrier frequency measuring amplifier for operating inductive LVDT sensors
  • Proven analogue circuit for industry and laboratory
  • Robust design on eurocard PCB 
  • System-compatible for 19"-casing and 19" sub-racks

Important features

  • Supply: ±15 VDC or 230VAC
  • Carrier frequency: 10 kHz
  • Output signal: ±10 V or 4 ...20mA
  • Design: Euroboard PCB with front panel

Suitable sensors

     
Type   Inductive transducers in differential LVIT sensor or differential transformer circuits
Required sensitivity   10 ... 400 mV/V

Oscillator

   
Carrier frequency
approx. 10 kHz (trapezoidal)
Bridge supply voltage
ca. 1 Vrms

Amplifier

   
Linearity error
< 0.1%
Temperature coefficient of zero point < 0.1 % / 10 K
Temperature coefficient of sensitivity
 < 0.2 % / 10K
Interference voltage (residual carrier voltage)
< 2 mVeff
Load capacity max.
10 mA
Drift
ca. ±10 % of final value; up to ±100 % possible as special version
Cut-off frequency for the measurement signal (-3 dB)
500 Hz

General information

   
Max. current 25 mA at ±15 V supply without current output stage
50 mA at ±15 V supply with current output stage
Calibration through potentiometer
Gain setting fine: by potentiometer
coarse: by fixed resistor
Phase adjustment through fixed capacitor
Electrical connector Plug connector according to DIN 41612, 32-pin, type C
Special version: 16-pin terminal block
Required mating connector Female connector according to DIN 41612, 32-pin, type C or D
Operating temperature 0 ... 60 °C
Storage temperature -25 ... 85 °C

Type-dependent information

   
Operating voltage ±15 V; 230 V~ in field casing
Rated output ±10 V; 4 ... 20 mA
Dimensions without front panel and field casing approx. 100 x 167 x 25 mm
Front panel dimensions 35.3 x 128.4 mm (19": 7 TE x 3 HE)
Weight without front panel and field housing approx. 0.2 kg
Weight with front panel approx. 0.23 kg

Version overview

Product code Casing Supply Output signal
MBI 50.25.5 Eurocard PCB without front panel ±15 VDC 10 V
MBI 50.25.7 Eurocard PCB without front panel ±15 VDC 4 ... 20 mA
       
MBI 50.25.3 Eurocard PCB with front panel ±15 VDC 10 V
MBI 50.25.8 Eurocard PCB with front panel ±15 VDC 4 ... 20 mA
       
MBI 50.25.1 Eurocard PCB with front panel
10-level precision pots		 ±15 VDC 10 V
MBI 50.25.2 Eurocard PCB with front panel
10-level precision pots		 ±15 VDC 4 ... 20 mA
Note: The 10 V output provides a nominal output signal of ±10 V for balanced systems (these are the most common inductive transducers). With unbalanced systems, the output is 0 ... 10 V.

Downloads

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Accessories

Connector strip

Accessory

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