LCA15 Intelligent Load Cell Amplifier
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 |
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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 |
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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 |
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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 |
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PCB Case Dimensions | 120 x 200 x 75mm (without glands, see diagram below) |
Case Material | ABS |
- Vessel weighing
- Silo weighing
- Batch control
- Crane overload protection/weighing
- Force measurement