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WIKA · Force measurement · Family B1940

Analogue cable amplifier

For strain gauge measuring bridges
Output
0/4 ... 20 mA or DC 0 ... 10 V
Accuracy
< 0.01 % FS
Protection
IP67
EN 61326-1:2013EN 61236-2-1:2013CISPR 11:2009 + A1:2010CEEN61326-1:2013EN61236-2:1:2013CISPR11:2009+A1:2010
Price
On request
Depends on configuration
Request a quote
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Description

The B1940 analogue cable amplifier is used to adapt the output signal of strain gauge force transducers to indicators or to a downstream controller.

Through the compact form of its case, it can be fastened almost anywhere with a simple screw clamp. The case corresponds to IP67 ingress protection and is thus suitable for use in harsh environments.

All strain gauge force transducers that can be operated with a DC voltage can be connected. With the combination of the cable amplifier with a force transducer, this force unit can be adjusted in line with customer wishes.

Analogue cable amplifier, model B1940

The supply voltage of DC 18 ... 30 V ensures a direct connection to a PLC. This usually features a 24-volt supply voltage. The analogue output enables the direct signal processing in the PLC.

Special features

  • High accuracy
  • Input signal: strain gauge measuring bridge; Output signal: 0/4 ... 20 mA or DC 0 ... 10 V
  • Cable length between amplifier and read-out unit: up to 100 m are possible
  • Compact design
  • Ingress protection IP67
Identification
ModelB1940
SubcategorySignal amplifier
Accuracy
Accuracy class< 0.01 % FS
Process conditions
Process temperature+10…+50 °C
Electrical characteristics
Output signal0/4 ... 20 mA or DC 0 ... 10 V
Operating environment
Ambient temperature+0…+60 °C
IP ratingIP67
Weight0.1 kg
Certifications and approvals
Certifications
EN 61326-1:2013EN 61236-2-1:2013CISPR 11:2009 + A1:2010CEEN61236-2:1:2013
Additional details
Cable length3 m
Datasheet languagesEN, DE
Tables from datasheet
Model B1940Version 0/4 ... 20 mAVersion DC 0 ... 10 V
Input signal4 x 350 Ωsensor, 4- or 6-wire
Sensitivity0.35 ... 3 mV/V
Linearity< 0.01%FS
Output signal0/4 ... 20 mA, 3-wireDC ±5V / ±10 V, 3-wire
Residual ripple< 10 mVat 400Ω< 10mV
Max. loadLoad < 400Ω-
Output resistance-<1Ω
Sensor supplyShort-circuit-proof to DC 10V (max. 20 mA)
Temperature effect on supply voltage< 25 ppm / K
Temperature effect on zero signalTK 0±0.1 μV / °C
Temperature effect on characteristic value TK c±5 ppm / °C
Rated temperature range10 ... 50 °C
Service temperature range0 ... 60 ° C
Storage temperature range-30 ...+80 °C
Insulation resistanceDC 100V,1GΩ
Supply voltageDC 18 ...30V
Residual ripple≤ 100mVRMS
Current supply< 70mA
Limit frequency1 kHz - 3 dB others on request
Ingress protectionIP67
Electromagnetic compatibilityEN 61326-1:2013 EN 61236-2-1:2013 CISPR 11:2009 + A1:2010
Dimensions (Ø x L)28 x 118 mm(incl. threaded connection)
Cable length
Sensor side1 m(max.3 m)
Output side3 m(max.100 m)3 m(max.10 m)
Weightapprox. 100 g