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There may be negative effect to RI-2000W when the loading is controlled because of
loading characteristics. Please take the measures below to stabilise operation and to
protect the contacts in such case.
Please attach a surge absorber (a CR circuit, a spark killer or a diode if it is a DC relay)
within the rating of on the relay coil with a under voltage relay directly.
＊
NOTE
There are cases which putting CR circuits on the contact’s side are better. That depends
on the loads condition, but you must confirm how the loading behaves before doing it.
Please put CR circuits on the loading side of the relay as needed.
-The concept of inductive load on the alarm contact-
The stated specifications of RI-2000Ws alarm contact is based on the condition on
resistance load. The failures below are prone to happen because of the occurrence of
high electromotive force when inductive loads are connected.
・
Lose relay functions due to welding on the relay.
・
Any electric component may be broken if high voltage comes into the detector.
・
Abnormal operation because of CPU runaway caused by huge noise.
There are other unpredictable noise penetrations into the relay other than inductive
load and the failures written above may happen.
Coil
Loading
SK
SK
V
V
Power supply
Power supply
Surge killer
Surge killer
RI-2000W
Alarm contact
Under power relay
