Riken Keiki OHC-800, Руководство по эксплуатации

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3 How to Install Calorimeter 3-3. How to connect wire
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Proper use of contact
If the contact output of this product is used on a line where large inductive load occurs, the following errors
may occur due to counter electromotive force generated at the contact.

Deposition, defective insulation or defective contact at the relay contact

Damage of any electric parts due to high-voltage generation

Abnormal operations by an out-of-control CPU
To control a line where large inductive load occurs, protect the contacts of this product as shown in the
figure below.

Relay it with an external relay (contact amplification). At the same time, the surge absorbing part SK1
suitable for the specifications must be attached to the external relay.

In addition, the surge absorbing part SK2 must be attached to the loaded side of the external relay if
necessary.

It may be recommended that the surge absorbing part should be attached to the contact for certain load
conditions. It must be attached to an appropriate position by checking how the load is activated.
CAUTION

Do not use the contacts of the calorimeter directly for drive control over external devices that
generate large inductive load, such as a fluorescent lamp or large-scale motor.

To control a line where large inductive load occurs, provide an external relay for contact
amplification. However, because the coil of an external relay also involves inductive load, select
a relay at a lower voltage, and then protect the contact of the calorimeter with an appropriate
surge absorbing part, such as a CR circuit.
Contact
Power
supply
Power
supply
Coil
External relay
(low-voltage relay)
Load
* SK1, SK2: Surge absorbing parts