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7. Wiring and Terminal Sizes
7-1.
Wiring and terminal sizes of power supply and load
When wiring the power circuit for the instrument, make sure to check the
phase sequence (R-S-T). Never make a trial run etc. in an incorrect phase
sequence.
When you check the phase order using the monitor lamps of the instrument,
set the output to 0%.
If the phase sequence is incorrect, the red PL monitor lamp lights up.
In this case, change the connection of any two lines of the R, S, and T
phases.
CAUTION
If the instrument has the communication function, and data is written from the master equipment, trimmer adjusters and control input
terminals may be disabled, making output adjustment impossible. For details, refer to the PAC46 SERIES COMMUNICATION
INTERFACE INSTRUCTION MANUAL.
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Connect the power supply and load wires to the power supply terminals located at the bottom of the panel.
Power supply terminal(R)/
Output terminal (U)
Current capacity
20 to 30A
50 to 100A
150 to 300A
500 to 600A
Φ
4.0 or more
6.0 or more
10.0 or more
12.0 or more
D
12.2 or less
18.0 or less
30.0 or less
60.0 or less
Applicable screw
M4
M6
M10
M12
Tightening torque N•m
1.2 to 1.4
2.5 to 3.0
10 to 12
15.5 to18.5
- Screw terminal block -
When using the bare crimp terminals, secure a
necessary insulation distance to prevent electrical
shock and short-circuit, by using insulation tubing
or other means to prevent live parts from being
exposed.
7-2. Protective earthing
The symbol for protective earthing is
.
For electrical safety considerations, be sure to fix the instrument with screws via spring washers or the like to a metal plate that is connected
to the earth.
7-3. Wiring of control input signal
Control signals (4–20 mA, 1–5 V, or 0–10 V) from the controller are input into control signal terminals 1 [C (+)] and 2 [C (-)].
While paying attention to the polarity, wire carefully so as to prevent noise from a strong electric circuit.
Countermeasure against lightning surge will be required for signal line over 30m.
