Analog Converter for connecting Load Cells

SGA

The SGA Converter is an analog signal conditioner specific for load cells and for transducers based on strain gauges Wheatstone bridges

SGA converts the load cell output signal to different kinds of analog standard outputs used in industrial instrumentation. With DIL switches can be selected: Current output 0-20 mA or 4-20 mA; “Unipolar” voltage output 0-5V or 0-10V and “Bipolar” voltage output ±5V o ±10V

It has integrated filter with selectable cut-off frequencies from 1Hz to 5 KHz, for reducing oscillations induced by mechanical vibrations and/or electrical noise, providing stable readings under adverse conditions

Ref. Versions

Ref. 89060SGA-A Power supply
110/230 V AC and 18/24 V DC
Ref. 89061SGA-D Power supply 18/24 V DC

Specifications

  • User-selectable analogue output: ±10V, ±5V, 0-10V, 0-5V, 0-20mA, 4-20 mA.
  • Power supply 4 load cells of 350 Ω or 8 load cells of 700 Ω
  • Gain adjustment for different Load Cell sensibilities by DIL switches and fine adjustment potentiometer
  • Zero adjustment up to 80% offset by DIL switches and fine adjustment potentiometer
  • Enclosure IP65 ABS case 160x80x55 mm with 3 cable glands
  • Transport weight: 0.5 kg

Parameter Mín. Typical Máx. Units
Power supply (SGA/A):(110/230V AC) 50-60Hz 110/230 V AC
Power supply (SGA/A) and SGA/D) DC 18 24 V DC
Power supply current DC: (depends on loading) 90 mA
Load cell excitation 10 V
Minimum load cell resistance 85 Ohms
Bridge sensitivity (Switchable) 0.06 29 mV/V
Gain adjustment (Pot-fine adj.) 0.06 1.0 mV/V
Offset adjustment (Pot-fine adj.) 0 ±1.25 %FS
Offset adjustment (Weitchable-coarse adj.) ±1.25 ±79 %FS
Output load (Voltage output) 2 mA
Output load (Current output) 0 500 Ohms
Bandwidth (No filter >2mV/V) DC >6 KHz
Filter cut-off (Switchable ranges) 1 5000 KHz
Zero temperature coefficient 0.5 mV/ºC
Span temeperature coefficient 0.007 0.01 %/ºC
Linearity 0.03 %FS
Gain stability -1st 1000 hours 0.2 %FS
Gain stability -2nd 1000 hours 0.1 %FS
90 days FOCET stability 3.3 mV
Operating temperature range -10 50 ºC
Storage temperature range -20 70 ºC
Humidity 95 %
Parameter Description
Analog output ±10V , ±5V , 0-5V, 0-20mA, 4-20mA
Connections Field Screw terminals of 2.5 mm2
Enclosure IP65 ABS case 160x80x55 mm with 3 cable glands
Controls
  • Gain pot
  • Offset pot
  • Coarse gain switches
  • Coarse offset switches
  • Filters cut-off switches
  • Output mode switch
Approvals
EMC Emissions EN 50 081-1: 1992(Light Industrial)
EMC Emissions EN 50 081-1: 1992(Heavy Industrial)
Low Voltaje Directive IEC 1010-1 : 1990 EN 61010 : 1993
SGA/A and SGA/D complies with IEC 1010-1:1990 Part 1 for:
  • Rated for Basic Insulation
  • Normal Condition
  • Pollution Degree 2
  • Permanently Connected
  • Insulation Category III

Technical Documentation

ES EN DE FR RU
Data Sheet
Instalation Manual SGA
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