PLC Transistor Type Output

What is PLC Output Types?

Relay Type and Transistor Type

Transistor Divided Into Sink and Source Output Type

1.Sink Output Type: ( -ve common)

The Sink Output type module requires a negative (-ve) common connection.

When output Y is on it gives negative polarity.

Wiring-

1.PLC Sink Wiring

Connect the PLC wiring to an external load as shown in the image below.

Selecting a PLC with a sink output type depends on external devices such as servo drives, stepper drives, or relays, which require a negative supply to complete their required circuits.

While selecting sink types PLC please check all output devices requires sink supply.

2.Source type Output: (+ ve common)

A source type output module requires a positive common. When output Y is on, it will provide a positive polarity.

2.PLC Source type output Wiring:

Connect the PLC wiring with external Load as shown in below image. Selecting a Source output type PLC depends on external devices such as servo drives, stepper drives, or relays, which require a positive supply to complete their required circuits.

Advantages of Transistor type Output.

1.Fast Switching

Transistor outputs are mainly used for fast switching operations. Compared to ‘relay outputs,’ ‘transistor outputs’ have a better lifespan.

It is primarily used to control servo drives and stepper motors that require high-speed pulses.

2.PID Applications

Transistor output is also used in PID applications, as it requires fast switching. In such applications, a relay output module can’t provide the required accuracy.

3.Logitivity

Transistor outputs typically have a longer lifespan compared to relay outputs because they lack the mechanical components that can wear out over time.

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