Teknic ClearPath-SCHP Series, User Manual

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C
L E A R
P
A T H
- S C U
S E R
M
A N U A L
R
E V
. 1 . 3 6
1 0 5
T
EKNIC
, I
NC
. T
EL
. (585) 784-7454
A
PPENDIX
E: G
ROUNDING AND
S
HIELDING
P
ROTECTIVE
E
ARTH
(PE) C
ONNECTION
Compliance Note: ClearPath-SC must be properly connected to the
machine’s Protective Earth terminal to meet EMC emissions specification
EN-61000-6-4, and EMC immunity specification EN-61000-6-2, as well
as EMC electrical safety specification EN-61010 (for CE/UL compliance).
Connect ClearPath-SC to your machine’s Protective Earth terminal (PE)
using one of the following methods.
•
If the motor mounting plate is bonded to machine PE
(typical), most of the work is already done. Simply secure
ClearPath-SC to the mounting plate with conductive fasteners
(don’t use anodized or coated hardware). Ensure direct, bare metal-
to-metal contact between the ClearPath-SC motor face and
mounting surface.
•
If the motor mounting plate is not bonded to machine PE
it’s still easy to make a good PE connection. Just install a grounding
wire from ClearPath-SC’s Auxiliary PE Connection Point (located
on the motor’s rear casting) to a point on the machine that is
bonded to machine PE. Use #6-32, thread forming screw,
5/16" length (McMaster-Carr PN
93878A145)
. Use grounding
wire with same AWG number (or heavier) as the ClearPath DC
power input wiring.
Note: In scenarios where ClearPath-SC is not connected to a PE
(Protective Earth) return path–such as during bench testing or
maintenance–temporary grounding measures may be necessary to comply
with safety requirements.
G
ROUNDING AND
S
HIELDING
•
Always maintain separation between isolated control ground and
power ground.
•
Shielded cable is not required for ClearPath-SC control cables.
•
If you choose to use shielded control cable, connect the cable’s
isolated ground at one point at the controller only. Do not hook
isolated control ground to the machine frame or chassis at any
other location.
•
Do not ground ClearPath-SC I/O circuits to the machine frame or
chassis.
Note: All ClearPath-SC I/O signals are electrically isolated from
ClearPath-SC’s DC power input and motor output circuits, as well as from
the motor case. This design feature helps to ensure that control signals
aren’t compromised by induced currents from the motor, power supply, or
internal PWM.