6
GROUNDING AND SHIELDING
Good quality screened cables should be used for the auxiliary port. The serial ports and CANbus port are not galvanically
isolated, therefore the 0V return MUST be connected to all peripheral devices. In addition, bond together the 0V (24V return)
terminals of all system components so as to minimise current flowing in the serial cables.
Ensure that:
1. 0V connection is NOT used for terminating screens.
2.
For fully opto-isolated inputs on the drive, the 0V may be
ommitted.
3.
Screen should be connected to either 9 or 15 way D-type
shell.
4. The MC404-Z 24V supply has common 0V with the drive(s).
0
0
WHEN WIRING MC404-Z STEPPER OUTPUTS TO A
NON-ISOLATED DIFFERENTIAL INPUT STEPPER DRIVE,
USE THE 0V AND SHIELD CONNECTIONS SHOWN FOR
THE ENCODER. THE STEPPER DRIVE MUST HAVE
ITS COMMON 0V CONNECTED TO THE MC404-Z 24V
RETURN.
Step+
Step-
Dir+
Dir-
Enable-
0V
Shell
Stepper Drive
S+
S-
D+
D-
E+
E-
0V
1
2
3
4
6
7
5
Encoder
A
A
B
B
Z
Z
0V
+5V
A
A
B
B
Z
Z
0V
+5V
Shell
1
2
3
4
6
7
5
8
9 Way D-type
(Connector 0-3)
9 Way D-type
(connector 3)
