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LCI - Load Cell Junction Box and Fault Monitoring Alarm


LCI - Load Cell Junction Box and Fault Monitoring Alarm
LCI - Load Cell Junction Box and Fault Monitoring Alarm

The LCI Load Cell Junction Box with fault alarm monitoring is designed for the protection of multi-load cell installations such as silos, tanks and other systems where the failure of an individual load cell can have serious consequences such as overflow or incorrect production batching . The device constantly samples the individual load cell channels and activates an alarm if any failure conditions are detected.

For the protection of multi-load cell installations such as silos, tanks. Alarm will be activated if:

  • One or more load cells are out of balance
  • Any load cell is operated outside a preset mV/V range
  • Excitation voltage deviates from preset range
  • Any connection is lost (open circuit detection)
  • Any short circuit is detected
     

Comes in an ABS IP65 Case (default). Stainless Steel and Die Cast enclosures are optional.
OEM Inquiries for PCB-Versions are welcome.

Specifications:

LCI
Faults Monitored Load Cell out of preset balance range
Load Cell out of pre-set operating range
Low/high excitation
Open circuit to any load cell on each connection
Short circuit on any load cell connection
Internal load cell fault (Bridge Imbalance)
Powering Indication By Load Cell Excitation typically 10v DC
1 x 4 digit 7 segment LED display for set up, load cell in error type & individual total mV outputs
6 buttons for reading & set up
Setting Method 2 part terminals, up to 2.5mm² cable
4 x 5 way, for load cell connection
Connections 1 x 5 way, load cell output
1 x 3 way, alarm relay contacts
Dimensions 200 x 120 x 75mm. (PCB dimensions 170 x 100mm excluding case)
Environmental Sealed to IP65 with cable glands & blanking plugs fitted CE Compliance.
Enclosure Material Grey ABS
Option Available
LSS Stainless Steel Junction Box Enclosure IP65
Protection
Surface Junction Box to IP65
Parameters Min Typical  Max  Units
Power Supply Volts from Excitation Supply 8.2 10  10   V dc
Power supply Current from Excitation Supply 1   43  52  mA 
Bridge Excitation 350R Load Cell 10  12 
Bridge Resistance (typically 350-700R) each 300  350  1000  ohms 
Bridge Sensitivity 1.0  2.0  5.0  mV/V 
Bridge No Selectable   Bridges 
Output Load 1M    100G  ohms 
Bandwidth of Junction Box   100    Hz 
Zero Temperature Co-Efficient of Junction Box at 2mV/V -0.0005 0 0.0005 %V/°C
Span Temperature Co-Efficient of Junction Box -0.0005  0.0005  %/°C
Linearity of Junction Box -0.0015 0.0015   %FSD
90 Day Stability of Junction Box -0.001 0.001  %
90 Day Stability of Junction Box -0.001 0.001  %FSD
Operating Temperature Range -40   85  °C
Storage Temperature Range -40   95  °C
Humidity   95   %
Scan Speed for Alarm Output (4cells)   40 100 mS
Display, Range -50.00   +50.00 mV
Relay Contacts SPCO Normally Energized     500 mA
Relay Contacts SPCO Normally Energized     50 V
Alarm Operating Speed for less than 1mV change   100   mS
Notes
1. To enable ADW15 or LCA15 to drive 4 x 350R load cells and the LCI.
2. Allowance for optional fitting of ‘Voltage absorber’ to excitation supply to protect in near lightening conditions.
3. Relay normally energised.
4. Display normally to show mV total, or fault indication if present.
5. Alarm will not function when input speed exceeds change of 1mV in 100mS. This is to prevent false alarms during sudden change of load.
 Environmental    
Relative Humidity 95% maximum non condensing
CE Environmental Approvals European EMC Directive 2004/108/EC, Low Voltage Directive 2006/95/EC


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