上海维宏电子科技股份有限公司
Weihong Electronic Technology Co., Ltd.
- 14 - Specialized, Concentrated, Focused
2.1
Basic Concepts of Signal
2.1.1
Signal Types
The signal types of NK280 system can be divided into the following 4 types: binary input signal,
relay output signal, differential output signal and analog 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.
Note:
1)
NK280 standard 4-axis system also supports high level effective, if this function is needed, please choose the
related terminal board EX6A4; at this time, conducting to 24V in NO connection means signal detected, and
disconnecting with 24V in NC connection means signal detected.
2)
NK280 dual Z system, system for key cutting machine and system for knife grinder machine do not support high
level effective.
Relay Output Signal
The relay output contact points on the terminal board have load capacity: 10A/250VAC and
10A/30VDC, which can control 220V AC load of low power. If high power load is needed, a contactor can
be used. Please see Fig. 2-1.
Machine Tool
(Example)
CON
COM
N.C
N.O
Terminal Board
Control
Output
AC
Fig. 2-1 Connection of relay output and contactor
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.
Analog Output Signal
SVC is controllable voltage output of 0~10V and externally connected with analog voltage frequency
command inputs of inverter. Therefore altering the controllable voltage leads to inverter frequency
change and a change of inverter frequency will change the spindle speed.
