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CF measuring amplifier MBI 46.33.

2-channel measuring amplifier for operation of inductive transducers / LVDT sensors
  • Suitable for LVDT and LVIT
  • Synchronized 2-channel version
  • Rugged industrial metal housing IP 65
  • In-channel zero and sensitivity adjustment

Important features

  • Supply voltage: ±15 V or +24 V
  • Carrier frequency: 5 kHz (others optional)
  • Output signal: ±10 V or 4...20 mA
  • Construction: Die-cast housing IP65

Suitable sensors

     
Type   Inductive transducers in differential LVIT sensor or differential transformer circuits
Required sensitivity   20 ... 600 mV/V

Oscillator (synchronized for both channels if necessary)

   
Carrier frequency 5 kHz ±5% (sine); others optional
Bridge supply voltage
approx. 2 Vrms
Supply current max.
12 mArms

Amplifier (per channel)

   
Linearity
< 0,1 % F.S.O.
Temperature coefficient of zero < 0.1 % / 10 K at 100 mV/V transducer sensitivity
< 0.15 % / 10 K at 20 mV/V transducer sensitivity
Temperature coefficient of sensitivity < 0.05 % / 10K at 100 mV/V transducer sensitivity
< 0.15 % / 10 K at 20 mV/V transducer sensitivity
Interference voltage (residual carrier voltage)
< 5 mVrms
Input resistance
approx. 200 kΩ
Output current max.
6 mA
Zero offset approx. ±10 % of the nominal range by trimming potentiometer
up to 100 % of the nominal range by fixed resistor
Zero point adjustment through trim potentiometer
Gain adjustment fine: by trimming potentiometer
coarse: by fixed resistor
Phase adjustment (may be omitted with matched measuring amplifiers) fine: by trimming potentiometer
coarse: by fixed capacitor
Cut-off frequency for the measuring signal (-3 dB)
500 Hz

General information

   
Power consumption max. 2 W per channel at ±15 V or +24 V excitation
Electrical connection Terminal blocks
Operating temperature 0 ... 60°C
Storage temperature -25 ... 85°C
Protection (DIN 40050) IP 65 casing

Type-dependent information

   
Supply (depending on option) +20 ... +30 VDC / ±15 VDC stabilised
max. 20 mVrms residual ripple
230 VAC
Nominal output ±10 V; 4 ... 20 mA
Dimensions W x H x L approx. 120 mm x 91 mm x 220 mm
Weight approx. 2,2 kg

Model list

Product code Channels Casing Supply Output signal
MBI 46.33.17 2-channel Field housing ±15 VDC ±10 V
MBI 46.33.18 2-channel Field housing ±15 VDC 4 ... 20 mA
MBI 46.33.27 2-channel Field housing 230 V ±10 V
MBI 46.33.27 2-channel Field housing 230 V 4 ... 20 mA
MBI 46.33.37 2-channel Field housing +24 V ±10 V
MBI 46.33.38 2-channel Field housing +24 V 4 ... 20 mA
Note:
The 10 V output provides a nominal output signal of ±10 V for balanced LVDT / LVIT. With unbalanced systems, e.g. MESSOTRON series WP, the output is 0 ... 10 V. This signal can be converted according to customer requirements.

Downloads

icon-pdf-blueProduct data sheet

icon-pdf-blueInstallation / Operating instructions

icon-pdf-blueElectronics overview

Accessories

terminal block

Accessory

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