Wiring - Delta AS Series Operation Manual

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4.4 Wiring

Please pay attention to the following warnings.

I/O module wiring notes

(1) Terminal definitions
(2) Terminals with insulation sleeves cannot be used as a terminal block. It is recommended that the
(3) Use single-wire cables or two-wire cables with a diameter of 24 AWG to 22 AWG and with less than

Before installing or wiring a module, you must verify that the external power supply is turned
off. If the power supply is not turned off, you may get an electric shock, or the product may be
damaged.

After you complete installing or wiring the module, make sure that a terminal block cover is
installed on the module before turning on the power supply or operating the module. If the
terminal block cover is not installed properly, you may get an electric shock, or the module
may not operate normally.

Be sure to connect the terminals FG and LG with protective grounding conductors. Otherwise,
you may get an electric shock, or the module may not operate normally.

To ensure that a PLC is wired correctly, you must check the rated voltage of the product and
the arrangement of the terminals. If the PLC is connected to a power supply that does not
conform to the rated voltage, or the product is not wired correctly, a fire may occur, or the
product may be damaged.

The external connections should be crimped, press-welded by specific tools, or soldered
correctly. Improper connections may result in a short circuit, fire, or malfunction.

Tighten the terminal screws to the specified torque. If the terminal screws are loose, a short
circuit, fire, or faulty operation may occur. Tightening the terminal screws too far may cause
damage to the terminal screws or the module, resulting in a short circuit or malfunction.

Make sure there are no foreign substances such as iron filings or wiring debris inside the
module. Foreign substances may result in a fire, damage, or malfunction.
◆ Two-/three-wire (passive sensor): the sensor and the system share the same power circuit.
◆ Four-wire (active sensor): the sensor uses an independent power supply and should not share the
same power circuit with the system.
terminals be covered with insulation tubes.
1mm pin-type terminals. Only use copper conducting wires with a temperature rating of 60/75°C.
< 1m m 8-10m m
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24-22AWG