IWAKI EWN -B16 TC, Instruction Manual

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Precautions for ON-OFF control by a mechanical relay
The control unit is equipped with CPU. Always start/stop the pump by
the STOP signal for ON-OFF control. Try not to turn on and off the main
power. Otherwise, observe the following points.
•
Do not turn ON/OFF power voltage more than six times per hour.
• When using a mechanical relay for ON-OFF operation, its contact capac-
ity should be 5A or more. Contact point may fail if it is less than 5A.
• If a mechanical relay with the contact capacity of 5A is used, the maxi-
mum allowable ON/OFF operation is about 150,000 times. The contact
capacity should be 10A or more when making ON-OFF operation over
150,000 times or sharing a power source with a large capacity equip-
ment. Otherwise a contact point may fail by surge voltage.
• Use a solid state relay (SSR) as necessary (such as the OMRON G3F).
See manufacturer's catalogues for detail.
Signal wire connection
Use DIN 4- or 5-pin female connector cables. We recommend the use of
Binder connector cables (German manufacturer). Contact us for detail.
Binder connector cables
5-pin : 713 series 99-0436-10-05 Input signals
4-pin : 715 series 99-0430-15-04 Level sensor signal
Connect these cables according to the following procedures. See manufac-
ture's instructions when using other connectors than Binder.
Points to be checked
• Check that the main power is turned off.
The pump is still charged right after turning off power. Wait for one
minute before wiring.
Wiring