Specialized Concentrated Focused
2. Wiring
2.1. Basic Concepts of Signal
2.1.1. Signal Type
The signal types of NK105 three axes system can be divided into the following 3 types: binary
input signal, open collector output signal, and differential output signal.
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.
Open Collector Output Signal
The output ports on the controller are open collector output, with maximum output current 50mA.
Differential Output Signal
Differential signal refers to two equivalent signals with opposite phases sent by driving end, and
the voltage difference of these two signals is used for deciding whether the logical status of differential
signal is “0” or “1”.
Pulse command format of controlling driver motion is pulse + direction, negative logic. And this
signal adopts differential signal transmission mode.
2.1.2. Binary Input
Connection of Binary Input and External Circuit
The wiring method between binary input signal and a mechanical switch is shown in Fig. 2-1:
I/O Board Card
24V
IN
GND
Fig. 2-1 Connection of mechanical switch and binary input
Wiring「3」
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