MP-Series Food Grade Servo Motor Installation Instructions
11
Publication MP-IN004D-EN-P — April 2009
Ground Shielded Signal Wires within a Power Cable
Always connect the shield on any signal wire pair routed inside a power cable to
the overall machine ground.
If you are installing a 2090-XXNPMF-
xx
S
xx
, or 2090-CPBM4DF-
xx
AF
xx
power
cable, loop the signal wire pairs to the overall cable shield as shown in the
diagram, and then clamp all the shields together in the power cable (chassis)
ground connection on the drive.
Grounding of Signal Wire Shields in a Power Cable
The signal wire pairs within the 2090-XXNPMF-
xx
S
xx
, or 2090-CPBM4DF-
xx
AF
xx
power cables often carry a 24V DC brake signal, but also can carry logic signals.
Grounding the shield that surrounds the signal wires dissipates any induced voltage
and reduces the effects of EMI.
ATTENTION
If any shield on a power cable is not grounded, high voltage can be present on that shield.
Make sure there is a connection to ground for all shield wires inside a power cable, and
for the overall power cable shield.
Failure to observe safety precautions could result in personal injury or damage to
equipment.
Shielded Signal Wires (two pairs) Within Power Cable
Overall Power Cable Shield
Signal Wire Shield (one of two) Contacts
Overall Power Cable Shield
Factory Supplied
Field Modified
All power and signal wire shields must connect to
machine ground.
The diagram shows one of the two signal wires in
the correct position. Connect both signal wire
shields and the overall power cable shield to
machine ground.
2090-XXNPMF-
xx
S
xx
(shown) contains two signal
wire pairs. 2090-CPBM4DF-
xx
AF
xx
contains one
signal wire pair.
