Specialized Concentrated Focused
Wiring
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2.1 Signal Types
The signal in NK200 integrated system can be classified into four types: binary input signal, relay output
signal, differential output signal and analog output signal.
2.1.1 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. (GND refers to
GROUND signal).
2.1.1.1 Input Binary
Connection between binary input and external circuit
The wiring method between binary input signal and a mechanical switch is shown in Fig. 2-1:
GND
IN
24V
I/O Board Card
Fig. 2-1 Connection of Mechanical Switch and Binary Input
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 shown in Fig. 2-2.
24V
1
0
K
COM
IN
24V
I/O Board Card
External Input
Recommended
Fig. 2-2 Binary Input of NPN Type Connecting with Photoelectric Switch or Proximity Switch
Power requirement
It is recommended to adopt DC24V/4.5A switch power for relays on the terminal board. If there are a
great many DC 24V relays controlled by binary output signal, users can appropriately expand the power
