Chapter 2
Installation/Wiring
2–16
Signal Ground – TE
The TE terminal block is used for all control signal shields internal to the
drive. It must be connected to an earth ground by a separate continuous
lead.
Any PLC I/O communication link must be run in grounded steel conduit.
The conduit should be bonded to ground at both ends. Ground the cable
shield at the drive end only.
The maximum and minimum wire size accepted by this block is 2.1 and
0.30 mm2 (14 and 22 AWG). Maximum torque is 1.36 N–m (12 lb.–in.).
Use Copper wire Only.
Safety Ground – PE
This is the safety ground required by code. The ground bus can be
connected to adjacent building steel (girder, joist) or a floor ground loop,
provided grounding points comply with NEC regulations.
RFI Filter
Important: Using an optional RFI filter may result in relatively high ground
leakage currents. Surge suppression devices are also incorporated in the
filter to clamp line surges to a limited voltage above ground potential.
Therefore, the filter must be permanently installed and solidly grounded.
Grounding must not rely on flexible cables and should not include any
form of plug or socket that would permit inadvertent disconnection. The
integrity of this connection should be periodically checked.
Figure 2.8.
Recommended 1336 FORCE Grounding
JOG
ESC SEL
R (L1)
S (L2)
PE
Ground Rod
T (L3)
PE
U (T1)
Shield
RIO/DH+
Shield
Common
Mode
Core
Common
Mode Core
Conduit/4–Wire Cable
To Computer
TE Ground
+ Common
Mode
Chokes*
*These are options that can
be installed as needed
Ground per
Local Codes
Motor Frame
Motor
Terminator
PE
V (T2)
W (T3)
PE/Gnd.
+DC
DC
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