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4.2 Wiring for Power Supply Terminal Block
This terminal block is used to supply this option with 24 V power to operate it. Perform wiring for the terminal
block as described blow.
(1) Wiring for the power supply terminal block (TERM3)
The terminal block uses a pluggable 3-pin connector as shown in Figure 4.2. Table 4.1 shows the pin
assignment.
A typical connector that matches this terminal block is Phoenix Contact MSTB 2.5/3-ST-5.08.
Table 4.1 Pin Assignment on Power Supply Terminal Block
Pin # Terminal
name
Description Remarks
1 24V Power supply
(24 VDC, + side)
2 0V Power supply
(24 VDC, - side)
The PLC terminal of the
FRENIC-Multi is available as
a 24V power source. Connect
the PLC terminal to this "24V"
terminal and CM terminal to
this "0V" terminal.
3 E Grounding
terminal
Connect the ground terminal
of the inverter (
G) to this
terminal.
For protection against external noise and prevention of failures, be sure to connect a grounding
wire.
Table 4.2 lists the recommended wire size, terminal screw size and its tightening torque.
Table 4.2 Recommended Wire Size, Terminal Screw Size, and Its Tightening Torque
for the Power Supply Terminal Block
6mm
電線
Figure 4.3 Recommended Strip Length of the Cable Wire End
for Terminal Connection
Wire size Terminal screw size Tightening torque
AWG20 to AWG16 (0.5 to 1.5mm
2
),
wire with rated temperature 105 °C (UL)
recommended
M3 0.5 to 0.6 N･m
1 2 3
Figure 4.2 Connectors on the Power
Supply Terminal Block
Cable wire
pprox.
6.0 mm
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