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Installation
5-2. Wiring of external input signal
Caution
Risk of electrical shock. Never connect wires while power is
turned on. Controller may be short-circuited. Turn off power
before wiring work.
Caution
Wait for one minute after the power is turned off, because elec-
tricity is still charged in the pump right after turning off power.
External signal
EXT function : Stroke rate is controlled by pulse signal.
STOP function : ON/OFF operation by external signal.
Use either a potential free contact or a open collector for exter-
nal signal. When a pulse signal is used, pulse width should
be between 10ms and 100ms and pulse speed should be 360
pulses/minute or below.
Caution
●
Wiring of EXT and STOP
Do not install the power cord and the EXT and STOP wires in
parallel. Do not bind or combine the power cord with the EXT
and STOP wires by a concentric cable (5 wires cable or so).
Otherwise noise is generated from the EXT and STOP wires
due to induction effect from the power cable and results in
wrong operation or failure.
●
When using SSR (solid state relay) for EXT/STOP signal
input
When using SSR for EXT/STOP signal input, use the recom-
mended products stated below. Any SSR other than recom-
mended can cause malfunction.
1. G3FD-102 S or G3FD-102SN made by OMRON
2. G3TA-IDZR02S or G3TA-IDZR02SM
Refer to information materials such as catalogue of manufac-
turer for further information.
●
When using a type device for EXT/STOP signal input
When using a type device such as relay for EXT/STOP signal
input, select some device of which the minimum application
load is 5mA or below.
If the relay of contact point volume 5A is used for EHN, it can
be used for max. 150 thousands times of ON/OFF operation.
If 150 thousands times or more of ON/OFF operation are
required, or a power source is shared with a large capacity
equipment, the contact may be welded by surge voltage. In
this case use the relay of contact volume of 10A or more. If its
durability is not enough, use non contact transistor relay (ex.
G3F made by OMRON or so). For details refer to catalogue or
other documents of equipment manufacturer.
