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Installation
3.4.8 Grounding (Earthing)
WARNING
GROUNDING HAZARD!
for operator safety, it is important to ground the option
panel properly. Failure to do so could result in death or
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serious injury.
NOTE!
It is the responsibility of the user or certified electrical
installer to ensure correct grounding (earthing) of the
equipment in accordance with national and local electrical
codes and standards.
•
Follow all local and national codes for proper
electrical equipment grounding (earthing).
•
Correct protective grounding of the equipment
must be established. Ground currents are higher
than 3 mA.
•
A dedicated ground wire is required for input
ground.
•
Connect the ground wire directly to a reliable
earth ground. Grounding studs are provided on
the back plate of the panel for grounding.
•
Do not use conduit connected to the panel as a
replacement for a ground wire.
•
A high strand count ground wire is preferred for
dissipating high frequency electrical noise.
•
Keep the ground wire connections as short as
possible.
•
Ground the motor to the panel with insulated
wire run inside metal conduit with motor leads.
3.4.9 Control Wiring
Detailed instructions for terminal connection, control
wiring installation, and operation are shown in Section 5
Electromechanical Bypass (EMB2) Operation and Section 6
Electronically Controlled Bypass (ECB) Operation.
•
It is recommended that control wiring is rated for
600 V for 480 V and 600 V drives and 300 V for
200-240 V drives.
•
Isolate control wiring from high power
components in the drive.
•
See 3.4.2 Wire and Cable Access for details.
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Vertical Bypass/Non Bypass Panel
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Figure 3.19 Control Terminals Location
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2.
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3.4.10 Serial Communication Bus
The ECB reports serial communication data to host systems
through the drive. Connection to the serial communication
network is made either through the EIA-485 terminals on
the drive (see Figure 3.19) or, for other protocols, terminals
located on the communication option card. For option
card connection, see the option card instructions provided
with the unit.
•
NOTE!
It is recommended to use braided-shielded, twisted-pair
cables to reduce noise between conductors.
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®
MG.13.A1.22 - VLT
is a registered Danfoss trademark
EIA-485 terminal
Jumper wire
Control terminals
Grounded restraining clips
Connection
For ECB serial communication protocols using the
EIA-485 terminals, make connections in the
following manner.
Connect signal wires to terminal (+) 68 and
terminal (-) 69 on control terminals of drive. (See
the drive support materials for wire size and
tightening torque.)
Terminate shield to grounded restraining clip
provided by stripping wire insulation at point of
contact.
If shielded cabling is used, do not connect the
end of the shield to terminal 61.
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