Emc Precautions; Network Connection - Danfoss VLT DriveMotor FCP 106 Programming Manual

RS485 Installation and Set-...

3.1.2 EMC Precautions

NOTICE
Observe relevant national and local regulations
regarding protective earth connection. Failure to ground
3 3
the cables properly can result in communication
degradation and equipment damage. To avoid coupling
of high-frequency noise between the cables, the RS485
communication cable must be kept away from motor
and brake resistor cables. Normally, a distance of 200
mm (8 inches) is sufficient. Maintain the greatest
possible distance between the cables, especially where
cables run in parallel over long distances. When crossing
is unavoidable, the RS485 cable must cross motor and
brake resistor cables at an angle of 90°.
1
2
90°
1 Fieldbus cable
2 Minimum 200 mm (8 in) distance
Illustration 3.2 Minimum Distance between Communication
and Power Cables
16
®
VLT DriveMotor FCP 106/FCM 106

3.1.3 Network Connection

Connect the frequency converter to the R4S85 network
as follows (see also Illustration 3.3):
1.
2.
3.
NOTICE
INSULATION REQUIREMENTS, MH1
For control card and relay card wires, the minimum
required insulation is 300 V and 75 °C (167 °F).
NOTICE
Screened, twisted-pair cables are recommended to
reduce noise between conductors.
COMM. GND Communication ground
P
N
Illustration 3.3 Network Connection
4.
Danfoss A/S © 11/2015 All rights reserved.
Connect signal wires to terminal 68 (P+) and
terminal 69 (N-) on the main control board of the
frequency converter.
Connect the cable screen to the cable clamps.
Terminal 61 is normally not used. However, when
there is a large potential difference between
frequency converters, connect the screen of the
RS485 cable to terminal 61. Terminal 61 has an
RC filter to eliminate current noise on the cable.
61 68 69
(P+) Positive
(N-) Negative
Set the control card DIP switch to ON to
terminate the RS485 bus, and activate RS485. For
position of DIP switch, see Illustration 3.4. The
factory setting for the DIP switch is OFF.
MG03N202