Rockwell-automation 1769-BOOLEAN Compact I/O BOOLEAN Module Installati Manual do Utilizador descarregar pdf (Página 26)

Publication 1769-IN077A-EN-P - May 2006

Transistor Output Transient Pulses

The maximum duration of the transient pulse occurs when minimum load is connected to the

output. However, for most applications, the energy of the transient pulse is not sufficient to

energize the load.

Figure 3 illustrates that the duration of the transient is proportional to the load current.

Therefore, as the on-state load current increases, the transient pulse decreases. Transients

when you cycle power do not exceed the time duration shown for the amount of loading

indicated at 60 °C (140 °F).

Figure 3 Transient Pulse Duration as a Function of Load Current

ATTENTION

A transient pulse occurs in transistor outputs when the external dc supply

voltage is applied to the output common terminals, for example, via the

master control relay. The sudden application of voltage creates this

transient pulse. This condition is inherent in transistor outputs and is

common to solid-state devices. A transient pulse can occur regardless of

the controller having power. Refer to your controller’s user manual to

reduce inadvertent operation.

1 2 ... 21 22 23 24 25 26 27 28

Sem comentários

Rockwell-automation 1769-BOOLEAN Compact I/O BOOLEAN Module Installati Manual do Utilizador Página 26