Principle Of System Signal; Binary Input Signal; Binary Input - WEIHONG NK105 G2F Manufacturer's Manual

2. Principle of System Signal

The signal types of NK105G2F/G3F system can be divided into the following 4 types: binary input signal,
open collector output signal, differential output signal and analog output signal.

2.1. Binary Input Signal

Binary input signal is active low and supports NO and NC input signals (through modifying input port
polarity in the software). Conducting to GND (i.e. grounding signal) in NO connection means signal
detected, and disconnecting with GND in NC connection means signal detected.

Binary Input

2.1.1.
 Connection of Binary Input and External Circuit
The wiring method between binary input signal and a mechanical switch is shown in Fig. 2-1.
Binary input signal can be connected with a photoelectric switch or a proximity switch of NPN (NO or NC
type). Its joining method is as below.
Fig. 2-2 Binary input of NPN type connecting with photoelectric switch or proximity switch
「14」Principle of System Signal
I/O Board Card
Fig. 2-1 Connection of mechanical switch and binary input
I/O Board Card
24V
IN
Specialized Concentrated Focused
24V
IN
GND
External Input
24V
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