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LCA15 Intelligent Load Cell Amplifier

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The LCA15 intelligent Strain Gauge amplifier offers both 4 to 20mA and 0 to 10 volt analogue outputs, from any standard Strain Gauge input. 1 pass calibration and setting of the analogue output range, make the unit extremely user friendly; being set up by a simple hand held or on board programmer/display. Auto Tare and Peak Hold (if set) on the analogue output are operated via volt free contact closures.

Output options include:- Relay Set Points Programmed in engineering units, with In Flight compensation and Hysteresis settings are available for control or alarm purposes.

Communications:- To read any value, change set points or any other parameter via:
RS232/RS485 (RC3) - Formats include MANTRABUS, ASCII, MODBUS RTU

The RS232 output can be configured to provide a printer output. Activated by a contact closure, displays the current live value, with header message, engineering units, auto incrementing batch number and a real time if required.

Options:- 9-32V DC power supply (LS3), Stainless Steel case sealed to IP65 (LSS), Available without its case as a separate Eurocard PCB assembly (LCB)

  • 10 years data retention
  • 10V @ 160mA excitation to drive up to 6/350 ohm Strain Gauges
  • 4-20mA and 0-10V outputs
  • Auto Tare
  • Digital programming, calibration & display
  • High accuracy
  • IP65 surface mounting case
  • Isolated analogue outputs
  • Low drift
  • Simple one pass Auto Calibration
  • Variable gain Strain Gauge sensitivity from 0.5 to 200mV/V
  • Wide range of power supplies

Inputs

Speed 10 readings per second with a digital filter to reduce speed.
Accuracy/Repeatability Up to 90 days ± 0.08% of reading, ± 0.05% FSD typical
Drift Up to 0.002% per degree C @ 2.5mV/V typical
Resolution 15 bit (4.5 digits)
Contact inputs Available for auto tare, print and peak hold reset (volt free).

Analogue Outputs

Drive 4-20mA up to 1Kohm and 0-10 volts up to 2mA.
Accuracy 4-20mA ±0.15% of range (typically) 0-10V ±2% before calibration
Resolution 13 bit (Settling time 0.25 secs to 1% of step change)
Isolation ±130V RMS or DC max to analogue input or any other port

Options Available

2 set points Output through 5A, 230V ac SPCO relays (volt free contacts with latching and inversion options
Communications Port 20mA loop - enabling up to 254 to be multi dropped to 1 x RS232 via IF25 interface
  RS485 - enabling up to 32 units to be multi dropped (isolated)
  RS232 - for 1 to 1 connection and standard printer drive (isolated)
  Baud Rates - 300, 600, 1200, 2400, 4800, 9600 (19200 MANTRABUS only)
Die Cast Case Sealed to IP65 with external dimensions of220 x 120 x 80mm max
Stainless Steel Case Sealed to IP65, with external dimensions of224 x 160 x 90mm
PCB Only (Eurocard) (LCB) 100 x 160 X 57mm for rack or customers enclosureDC Powering 9-32V dc

Data Retention/Protection

Retention 10 years for set up values, minimum of 100,000 write cycle
  Protection of data and function(s) Watchdog timer givingrepeat auto resets.
  Impending power detection and hold off.
  Keypad security and time out.

CE & Environmental

Storage temperature -20 to +70ºC
Operating temperature -10 to 50°C
Relative humidity 95% maximum non condensing
Safety/Low Voltage Directive 2006/95/EC
EMC Directive 2004/108/EC

Physical

PCB Case Dimensions 120 x 200 x 75mm (without glands, see diagram below)
Case Material ABS

LCA15

To view the various input and output options available for the LCA15, please view the LCA15 product datasheet by clicking here.

  • Vessel weighing
  • Silo weighing
  • Batch control
  • Crane overload protection/weighing
  • Force measurement

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