We have to interface loadcell with PLC

[balajiraja 0]

We have to interface load cell with Plc. So, We need converter circuit for that. Please suggest us circuit diagram or IC for that conversion.

Edited 24 Feb 2017 by balajiraja

[kaiser_will 65]

Details.  If you expect a detailed answer, circuit diagram or an IC for conversion, one must provide details.  PLC model and load cell specifications are needed.

[balajiraja 0]

Allen Bradley compactlogix L32E

Load Cell: M831 Electronic YZC 131 Weighing scale pressure sensor.

Specification:

Model: YZC-131A
Dimensions: 75x12.7x8mm/2.95 x 0.51 x 0.31"(L x W x H)
Range: 5 kg
Rated Load: 2 kg
Rated output: 1.0 ± 0.1mV / V
Nonlinear: ± 0.05% F.S
Hysteresis: 0.0% F.S
Repeatability: 0.05% F.S
Creep (5 minutes): 0.05% F.S
Temperature Effect on Output: 0.003% F.S /°C
Zero output: ± 0.2 mV / V
Input impedance: 1050 ± 10% ?
Output impedance: 1000 ± 10% ?
Insulation resistance: ?2000 M?
Operating temperature range: -21 ~ 40°C
Recommended for: kitchen scales
Weight:21g

[kaiser_will 65]

CompactLogix L32E  use the 1769 I/O family of modules.  http://literature.rockwellautomation.com/idc/groups/literature/documents/td/1769-td005_-en-p.pdf

This load cell has a 1V analog output signal.  #1769-IF4, 4-channel analog input module, range available of (0-5)V.  http://literature.rockwellautomation.com/idc/groups/literature/documents/td/1769-td006_-en-p.pdf

What accuracy do you desire with your load cell?  Take the time to work through the math to determine what your accuracy will be.  A 1769-IF4 analog input module will convert an analog input with 14-bit resolution.  You will lose some accuracy through the analog conversion.  Determine if the loss of precision will exceed your allowable accuracy specification.  If you find that the loss of precision is too great, consider finding a load cell with an output range matched to the analog input module, or consider going with an Ethernet/IP load cell that will not require signal conversion.