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:: Asphalt Manufacturing ::
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Asphalt Manufacturing Amps Monitoring
Heated silos are utilized at an asphalt
manufacturing plant to store the required asphalt for the following day’s state, local, or private asphalt projects. If
necessary, 24 hour manufacturing may be required to maintain the 200 ton and 300 ton silos to full capacity. Less wear on
the silos is realized when silos are full. To replenish the silo, a long conveyor is used to carry the asphalt from the
manufacturing process to the top of the silo 50 feet high. Previously, an operator monitored the current draw of the
motor driving the conveyor. If he noticed the current draw increased to a specific maximum, indicating a binding on the
conveyor had occurred, he would pause the manufacturing process to free the binding. The problem with this method is when
the operator needs to be away from his station performing other duties and a conveyor motor binds up, damage was done to
the motor because the bind in the conveyor was not recognized.
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The solution is the Red Lion Controls PAXP
Process Input Panel Meter and the PAXCDS10 Dual Relay Setpoint Card. The CTL0502F 50 A /4-20 mA Fixed Case Current
Transformer is chosen because the distance from the CT to the meter is 100 feet and this CT can be powered by the
PAXP.
All wiring must be according to the installation guidelines listed in the product’s
specifications. For the setpoint outputs to function an external isolated voltage source (not shown below) must be
connected in series.
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.: Solution Benefits :.
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This solution features...
- Easy to read Amps Value
- Setpoint level to alarm operator
- Operator time freed as no monitoring is required
- Setpoint operation to protect equipment
- Locked out meter avoids settings change
- Plug in card provides extra features such as communication or extra outputs if required in the future
For more information on this application, please refer to the
application note available for download below.
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.: Products :.
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Red Lion Parts List…
- PAXP0000 - Process indicator
- PAXCDS10 - Dual Outputs Card for flow control
- CTL0502F - Current Transformer 50 A to 4-20 mA
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.: Downloads :.
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No Documents Available
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.: Documentation :.
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 Asphalt Manufacturing Application 331KB
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