LAC65.1 Universal Analog Amplifier

LAC65.1

New product

Model LAC65.1 is a universal analog amplifier for static/semi-static weighing applications in adverse industrial voltage outputs. It can be mounted to a variety of DIN rails and uses robust terminals for worry free connections.

More details

$405.00

Data sheet

Height 35 mm
Width 77 mm
Depth 114 mm

More info


Model LAC65.1 is a universal analog amplifier for static/semi-static weighing applications in adverse industrial voltage outputs. It can be mounted to a variety of DIN rails and uses robust terminals for worry free connections.

The AC load cell excitation voltage assures lasting stability which is critical for analogue amplifiers. The AC voltage provides the advantage of EMI mitigation as well as suppression of the effects from thermal-electric effects. Both voltage and the current outputs are available simultaneously enabling dual readouts at separate locations. Low excitation voltage allows for low bridge resistance (40) preventing errors from thermal drift. Gain and zero adjustments do not affect each other. With the use of DIP-switches and precision 25 turn potentiometers, resolution of adjustments are maximized. With the wide input voltage range and isolated power supply, the LAC65.1 provides superior and reliable operation. Being manufactured since 1998, the LAC65.1 has been used and continues to be relied upon by thousands of customers worldwide.

  • High stability
  • Bipolar voltage output ±10v
  • Current output 0-20 or 4-20ma
  • Can drive up to 8 pc 350 ohm load cells or 24 pc 1000 ohm load cells

Features

  • Extreme stability and reliability in adverse industrial environments.
  • Both Bipolar voltage output (±10V) and current output 0-20 or 4-20mA, with ability for simultaneous output.
  • Can drive up to 8 Pc 350 ohm load cells or 24 Pc 1000 ohm load cells.
  • Wide range of gain with virtually no zero drift enables a live range down to a few percent of the load cell's rating.
  • Wide range of the low pass input filtering from 33 to 0.33Hz to meet any requirement.
  • AC excitation voltage (425Hz) cancels interference from EMI and thermal-electric effects from poor electrical connection.
  • Low 2.5V excitation voltage effectively prevent load cell warm up errors.
  • The layout of the front and the LED indicators simplifies set-up and calibration.

Dimensions

L W H
114 mm 77 mm 35 mm

Specifications

Input  

Linearity

<0.005 % of full scale.

 

Load cell excitation voltage

2.5 Vac 425Hz

 

Load cell drive capability

RLC 40-2000 ohm 

 

Load cell wiring system

6 wires inclusive sense

 

Load cell input range for full output

±0.17mV/V  to ±3.3mV/V.

 

Load cell input resolution

<100 nV (>50 000 increments at 2 mV/V input)

 

 

 

Zero/Gain

Zero coarse, binary increments

±2.4mV/V as 32 incr. of each 0.075mV/V input

 

Zero fine trim, 25 turn potentiometer

0.1mV/v, trim resolution <0.5uV/V

 

Gain coarse, binary increments

1*-32*  relative as 32 incr. of each 1*

 

Gain fine trim, 25 turn potentiometer

1-2* trim resolution <0.005*

 

Optional gain set

10*-320*

 

Zero/Gain change influence on zero

0.045%FS/1*gain change

 

 

 

Input filters

First filter: Fixed 2nd order:

32Hz cut off frequency (5ms)

 

Second filter: Adjustable 1st order

32-0.25Hz cut off frequency (5ms-640ms)

 

 

 

Analog output

Current output range

0-20mA or 4-20mA (reversed current protected)

 

Voltage output range

0-±10Vdc

 

 

 

General 

Off-set deviation between VOUT and IOUT

< 2%

 

Gain deviation between VOUT and IOUT

< 2%

 

 

 

 

Power supply

12-24Vdc 15% ripple; 3 Watt  Isolated

 

Isolation of the Power source

>10 M <1 nF  >0.5kV

Influences     

Temperature effect on Zero

Typical 10 ppm/°K, Max 25ppm/°K

 

Temperature effect on Span

Typical  15 ppm/°K, Max  30ppm/°K

 

Temperature range

Operating: -20°C/+50°C; Storage -30°C/+60°C 

 

Relative humidity

0-95 % non condensing

 

EMI 

10 V/m (1-1000 MHz) IEC801-1 level 2

 

Burst (Transients)

IEC 801-4           (level 2)

 

Electrostatic discharge to meet

IEC 801-2           (level 3)

 

General I/O protection, all pins

Reversed polarity, excess voltage and surge

 

Vibration

2.5 G operational; 5 G non-operational

 

Protection, environment

IP40

Dimensions

Height /length/width

L 114 mm; W 77 mm; H 35 mm incl. DIN rail clips.

 

Weight

130g (4.6oz) Net. (Packed 170g)

 

I/O pins

6 screw terminals, 3.81 mm pitch; 

 

 

 

Mounting

Universal DIN-rail clips is provided

15 to 35mm C or Hat profile

Standards

Conform to Council Directive 

CE in accordance with 93/98/EEC;  89/336/EEC

 

Certificate of approval 

-  

 

Certification accuracy

Class III:  10000e; 1 µV/VSI            

Download