User`s manual

Installation and Wiring
GFK-1742A Chapter 3 Installing and Wiring the DSM314 3-21
3
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
α
and
β
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 3-8. 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
α or β 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
α
and
β
Series Digital Servo amplifier encoder feedback cable always requires an A99L-
0035-0001 Cable Shield Grounding Clamp and one of the 11 available slots on a 44B295864-001
Grounding Bar at the amplifier end of the cable. This clamp arrangement serves as a mechanical