Cable Shielding
For proper shielding, the shield's drain wire should be terminated on only one side of the cable. The following
diagrams illustrate the best means of achieving this with the DMC-40x0, with the expectation that the controller's
base-plate is mounted to something with a secure connection to Earth Ground.
Figure 3.13 shows how to connect the encoder cable's shield drain wire. This side of the cable should then go to
the controller's 15 pin encoder connector, making a connection to Earth Ground.
Figure 3.14 shows how to connect the drain wire to the motor phase shield.
The motor phase drain wire is fastened to Earth ground on the controller box, shown in Figure 3.15.
For more information on the theory behind electrical noise and its different sources, see Application Note #5438,
https://www.galil.com/download/application-note/note5438.pdf
Chapter 3 Installation▫ 15
DMC-40x0 UL Installation Manual
Figure 3.13: Drain wire of the encoder cable shield
SOLDER DRAIN WIRE
TO CONNECTOR
COVER DRAIN WIRE
WITH HEAT SHRINK
ENCODER CABLE
Figure 3.14: Drain wire of the motor phase shield
SOLDER GRN WIRE
TO BRAIDED SHIELD
GRN/YEL WIRE
FROM CABLE
HEAT SHRINK
BRAIDED SHIELD
MOTOR LEADS
12-10 AWG
RING TERMINAL
CABLE
Figure 3.15: Ring terminal of motor phase drain wire connected to box of DMC-4040