N7201A617E00_0317 - 第508页

NPM-W 2 EJM7DE-MB-14M-00 Connection of air source and po wer suppl y Maintenance 14-5 14-5 -1 Tool used: Phillips screwdriver (No. 2), Allen wrench (3 mm) 3 Supply air ● Use an air dryer and always supply clean air. ● Ai…

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NPM-W2 EJM7DE-MB-14M-00
14-4-3-2
Change the machine voltage.
e.g., Changing from 400 V AC to
200 V AC
3
Check the
plant supply
voltage
Remove the
cover
4
Easy ways to check power supply grounding
(tester confirmation)
■If 5 wires of L1, L2, L3, N and PE are being drawn out
(= star connection) → Measure the voltage between N and
PE
(*1) The neutral wire (N) is not used for the machine. Leave
the cable unconnected to the machine and insulate its
end to keep it from coming in contact with a terminal and
others.
■If 4 wires of L1, L2, L3 and PE are being drawn out, it
can be either star connection or delta connection.
(Usually one phase is grounded on delta connection)
Measure and compare the phase to phase voltage (V
0
)
and the phase to PE voltage (V).
Example 1:
Delta connection grounded
Example 2:
Star connection not grounded
●If the neutral wire is grounded
The value is stable in the
approximate range of 0 to a
few volts.
Connectable at 290 V AC or
higher
●If the neutral wire is not grounded
The value is unstable
(indicates several tens of
volts)
Not connectable at 290 V AC
or higher
●If V = V
0
and V of single phase is 0 V
One phase is grounded on
delta connection
Not connectable at 290 V AC or higher
●If stable at " V
0
/ Square root of 3."
The neutral wire is grounded
on star connection
Connectable at 290 V AC or higher
●If the value is not stable
No ground contact
(Unknown connection type )
Not connectable at 290 V AC or higher
e.g.) Grounded star connection
Installation
●7 bolts
Front side
7
Attach the
cover
●7 bolts
Front side
NPM-W2 EJM7DE-MB-14M-00
Connection of air source
and power supply
Maintenance
14-5
14-5-1
Tool used: Phillips screwdriver (No. 2), Allen wrench (3 mm)
3
Supply air
●Use an air dryer and always supply clean air.
●Air pressure: 0.5 to 0.8 MPa
(The size of the inlet for connecting the hose is 3/8)
●After supplying air, adjust the air pressure to 0.500 to
0.505 MPa with the regulator (→P.4-1-1)
●Air supply rate: 200 L/min (A.N.R.)
2
Connecting air source
1
Remove the
cover
Rear side
●2 bolts
Compressed air piping
(Primary air supply side)
To each
device
A
Filter (inside)
Regulator
Connect the compressed air piping to the
area A in the figure below
NPM-W2 EJM7DE-MB-14M-00
1
14-5-2
Checking the power connection
L1 L2 L3 PE
2
Check that the following three voltages are
the same as their respective voltage labels
L1 L2 L3 PE
3
L1 L2 L3 PE
Check the
vacuum state
●The system is designed
to check the phase of
the vacuum-pump motor
automatically as the
power is turned on.
●If an error message is
displayed, confirm the
error information and
check if each phase of
the primary power
source is connected.
Remove the front
right side cover
An incorrect main power connection may reverse and damage the vacuum pump. Check to see if it is
correctly connected.
Checking for voltage
between L1 and L2
Checking for voltage
between L2 and L3
Checking for voltage
between L1 and L3
Main power
terminals
Main
power
terminals
Main
power
terminals
Connect the power supply and the air source to the machine at
the end of installation after checking for the voltage and
connections
(Risk of electric shock)
WARNING
Installation
Front side