Novusun CNC NCH02 Manual page 15

Figure2-8.
The relay with a absorption current of no more than 50mA can be driven directly. If it's
more than 50mA, and it is recommended to use a current amplification current, such as the use of
a ULN2803 chip. Reference figure 2-9 for external power relay method.
Figure2-9.
2.3.5 MPG port
As the Figure 2-2 showed, the marked No.5 position interface is MPG port . The pin order
see as Figure 2-10.
Manual of NCH02
the internal structure of the general output interface
general output interface connect with a small power relay
Figure2-10. MPG Port Pin order
- 13 -
www.nvcnc.net