User Manual
Chapter 3
GFK-1742F
Jan 2020
Installing and Wiring the DSM314
67
I/O Cable Grounding
Properly routing signal cables, amplifier power cables and motor power cables along with
installation of proper Class 3 grounding will insure reliable operation. Typically, Class 3
grounding specifies a ground conductor of a minimum wire diameter larger than the power
input wire diameter, connected via a maximum 100-ohm resistance to an earth ground.
Consult local electrical codes and install in conformance to local regulations.
The specifications for completing the
and
Series Digital Servo amplifier installation and
wiring, including amplifier grounding are completely described in the manual GFH- 001,
Servo Product Specification Guide.
When routing signal lines, amplifier input power line and motor power line, the signal lines
must be separated from the power lines. The following table indicates how to separate the
cables.
Table 20: Separation of signal lines
Group Signal
Action
A
Amplifier input power
Motor Power
Master Control Contactor (MCC)
drive coil. The MCC switches
amplifier input power.
Separate a minimum 10cm from group “B” signals by
bundling separately or use electromagnetic shielding
(grounded steel plate). Use noise protector for MCC.
B
DSM to Axis Terminal cable Axis
terminal cable to amplifier DSM
to Aux Terminal cable Encoder
feedback cable
Separate a minimum 10cm from group “A” signals by
bundling separately or use electromagnetic shielding
(grounded steel plate). Use all required individual cable
shield grounds and grounding bar connections.
DSM to
or
Series Digital Servo Amplifier
–
Signal Cable Grounding
The signal cables used with the DSM314 contain shields that must be properly grounded to
ensure reliable operation. The illustration below shows cable grounding recommendations
for typical installations. The following points should be considered:
1.
The DSM314 faceplate ground wire must be connected to a reliable panel ground.
2.
The Digital Servo Axis Terminal Block and Auxiliary Terminal Block each provide two
screw terminals labeled S. A short ground wire must be connected from one of the
S terminals to a reliable panel ground.
The
and
Series Digital Servo amplifier encoder feedback cable always requires an ZA99L-
0035-0001 Cable Shield Grounding Clamp and one of the 11 available slots on a
Z44B295864-001 Grounding Bar at the amplifier end of the cable. This clamp arrangement
serves as a mechanical strain relief and as cable shield ground. The outer insulation of the
Digital servo amplifier cable must be removed to expose the cable shield in the contact area
of the clamp.