Fastech Ezi-IO CC-Link IE TSN DIO, Руководство пользователя

Страница: 27 / 39

-27-
Chapter 8 Function Explanation
8.1 Open Collector Output
8.1.1 Open Collector Motion
An open collector is a common type of output scheme which functions like a switch where the output port is either
connected to the ground (ON) or disconnected (OFF) as shown in figure 8-1. The port does not output a particular
voltage/current but is connec
ted with the base of an internal NPN transistor whose collector is externalized (“Open”
Collector). External circuits determine the voltage/current.
The term was deviated from NPN transistors but also applies to PNP transistors and is commonly used in place of
Open Drain for FET devices as well.
Figure 8-1. Open collector output and switch