Network Connection; Cable Routing - Danfoss DriveMotor FCP 106 BACnet Operating Instructions Manual

Installation

3.1.4 Network Connection

Connect the frequency converter to the RS-485 network
as follows (see also Illustration 3.2):
1. Connect signal wires to terminal 68 (P+) and
3 3 terminal 69 (N-) on the main control board of the
frequency converter.
2. Connect the cable screen to the cable clamps.
3. Terminal 61 is normally not used. However when
there is a large potential difference between
frequency converters, connect the screen of the
RS-485 cable to terminal 61. Terminal 61 has an
RC filter to eliminate current noise on the cable.
NOTICE
Screened, twisted-pair cables are recommended to
reduce noise between conductors.
COMM. GND Communication ground
P (P+) Positive
N (N-) Negative
Illustration 3.2 Network Connection
4. Set the control card DIP switch to ON to
terminate the RS-485 bus, and activate RS-485.
For position of DIP switch, see Illustration 3.3. The
factory setting for the DIP switch is OFF.
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VLT DriveMotor FCP 106 & FCM 106 BACnet Operating Instructions
61 68 69
MG03O102 - Danfoss A/S © 12/2013. All rights reserved.
1
1 DIP switch
2 DIP switch set to factory setting, OFF position
3 DIP switch ON position
Illustration 3.3 DIP Switch set to Factory Setting

3.1.5 Cable Routing

The BACnet communication cable must be kept away from
motor and brake resistor cables to avoid coupling of high
frequency noise from one cable to the other. Normally a
distance of 200 mm is sufficient, but maintaining the
greatest possible distance between cables is generally
recommended, especially where cables run in parallel over
long distances.
When crossing is unavoidable, the BACnet cable must
cross motor and brake resistor cables at an angle of 90°.
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