CNCroom MB3 - Axis Connection X, Y, Z, A, B, C

Axis Connection X, Y, Z, A, B, C
AXIS CN2 terminal supplies motion command for drives.
VCC
Dir+
Step+
Dir-
Step-
optocoupler
XD-
XS-
(a) differential connection
XD+
XS+
Dir+
Step+
Dir-
Step-
XD-
XS-
Line Reciever
XD+
XS+
Dir+
Step+
Dir-
Step-
Optocoupler
XD-
XS-
twisted pair
cable
(b) single end sink connection
GND
Dir+
Step+
Dir-
Step-
optocoupler
XD+
XS+
(c) single end source connection
MB3
*grounding at drive side
*grounding at drive side
*grounding at drive side
Drive input
Figure 8, Axis command terminal and various connection modes
There are three different methods of connecting your drives to CN2.
Figure 8 (a) Differential connection has the best noise immunity. It is recommended to use
differential mode if possible.
Figure 8 (b) Single end sink connection is used if the exist connection system follows this fashion.
Figure 8 (c) Single end source connection is used if the exist connection system follows this
fashion. This connection is similar to computer parallel port.
www.CNCRoom.com Page 13