17
In
stal
lat
ion
Wiring
Wiring for power source, earthing and external signal.
Observe the following points
• Electrical work should be performed by a qualified electrician. Conform
to local electric codes.
• Do not perform wiring work while power is on. Otherwise, an electrical
shock or short circuit may result, and consequently the pump may fail. Be
sure to turn off power before service is performed.
Power & External signal cables
■
Before work
• Check that the main power is turned off.
• Apply the specified power voltage. See the spec label.
• When an external fuse is used and it has blown, always solve the root cause
of blowout. Be sure to unplug the power cable before investigation. If the fuse
blows frequently, the starting current may be a root cause.
• Red(+) and black(-) leads are for power voltage. ) and black(-) leads
are for 1-5V external variable signal. The black(-) lead is common for both the
power and the signal.
• The EMC of this product is maintained by a wind (two turns) of the 24VDC
line (red), GND line (black) and control voltage line (orange) on a TKK NFT-8
ferrite core. Always use this product in this state when it is built in your de-
vice. If further measures against EMI is needed, they should be taken to your
device.
NOTE
• Observe polarity, otherwise failure or malfunction may result. Note that rotational
direction of the motor does not change by reversing polarity.
Red: 24VDC (+)
Black: GND (-)
Orange: 1-5VDC external variable )
White: Encoder output (Max output current: 3mA)
Wiring
