Electrical Design
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3.2.3 Wiring Description of Control Circuit Terminals
Wiring of Analog Input Terminals (AI1–AI2)
Weak analog voltage signals are prone to suffer external interference. Therefore, the
shielded cable shorter than 20 m is required. In applications where the analog signal
suffers severe interference, install a filter capacitor or ferrite core at the analog signal
source.
Figure 3‑13 Wiring of AI terminals
Wiring of Digital Input Terminals (DI1–DI4)
The DI terminals can be wired in the sink (NPN) and source (PNP) mode.
● Sink wiring mode
■ Using the internal 24 V power supply of the AC drive is the most commonly
used wiring mode. In this mode, the OP terminal and 24 V terminal of the AC
drive are shorted, and the COM terminal is connected to the 0V terminal of the
external controller, as shown in the following figure.
Figure 3‑14 Sink wiring mode
■ If an external 24 V power supply is used, the jumper between the +24 V and the
OP terminals must be removed, the 24 V positive electrode of the external
power supply must be connected to the OP terminal, and the 0 V terminal of
the external power supply must be connected to a corresponding DI terminal
through the controller contact. See the following figure.
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