Love Controls LCU 032, Instruction Manual

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2 Installation
• Attach the brackets (2 units) on the fixed halls and tighten with a screwdriver. Fixing torque is about
14.7N. cm (1.5kg.cm) (Care should be taken not to tighten forcedly.)
3 Caution on terminal connections
• Use a compensating cable with thermocouple.
• For R.T.D input use a cable which is a small lead wire resistance and without resistance difference to
3wires.
• If the wiring has noise, use the following step: connect a surge absorber to the conductor coil side if
the conductors are connected to the load output, such as the relay contact output.
• Use an insulating transformer with a noise filter when the power supply has much noise.
• Noise filter should be mounted on a panel which has been earthed and the wiring between the noise
filter output and the instrument power terminals should be shorten.
• It is effective to use a twisted cable for power supply against noise.
• The heater power supply and the instrument power supply should be connected using the same
power supply when a heater break alarm.
• Time for preparation of contact output is required at power ON. When the output signal is used for
an external interlock circuit, connect a delay relay.
4 Other
• Do not use organic solvents such as alcohol, benzine when cleaning. (Use neutral detergent)
5 Caution on key operation / trouble
• If alarm function is not set correctly, alarm output can not be operated at a trouble.
Be sure to check the alarm operation.
• If the input cable is disconnected, the display shows “
b o U t
”.
When replacing the sensor, please turn OFF the power supply
CAUTION
1 For connection
• To avoid inductive noise to input wires separate from the power and output wires.
• Keep input wires away from output wires and use shielded wires.
2 For load circuit connection
•Use an extra relay when the frequency of operation is rather high. In this case, SSR output type is
Recommended.
• Electromagnetic switch : Proportional cycle time is Min. 30 sec
• SSR : Proportional cycle time is Min. 1 sec
• Contact output life : Mechanical : Min. 10 million times (no load)
Electrical : Min. 100 thousand times (rated load)
• SSR drive pulse voltage, DC 4~20mA are not insulated with internal circuit.
Use non-grounded sensor to R.T.D and thermocouple.
3 For waterproof (Waterproof type)
The instrument has IP65. Use rubber packing when installing the instrument to panel.
Please attach the rubber in correct way.
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