Danfoss VLT Midi Drive FC 280 Operating Instructions Manual page 20

Electrical Installation
L1(N) L2(L)
U V
4 4
Motor
Illustration 4.10 Connecting the Mechanical Brake to the
Frequency Converter
4.8.5 RS485 Serial Communication
Connect RS485 serial communication wiring to terminals
(+)68 and (-)69.
•
Screened serial communication cable is
recommended.
•
See chapter 4.3 Grounding for proper grounding.
Illustration 4.11 Serial Communication Wiring Diagram
For basic serial communication set-up, select the following:
1. Protocol type in parameter 8-30 Protocol.
2. Frequency converter address in
parameter 8-31 Address.
3. Baud rate in parameter 8-32 Baud Rate.
18
VLT
L3
Frequency converter
Output
relay
W
02 01
Mechanical
brake
Output
A1
contactor
input
Shaft A2
Brake power circuit
380 V AC
61
68 +
RS-485
69
Danfoss A/S © 11/2015 All rights reserved.
®
Midi Drive FC 280
•
Two communication protocols are internal to the
frequency converter. Follow motor manufacturer
wiring requirements.
•
Functions can be programmed remotely using
the protocol software and RS485 connection, or
Command circuit
in parameter group 8-** Communications and
220 V AC
Options .
•
Selecting a specific communication protocol
changes various default parameter settings to
Freewheeling
diode
match the specifications of the protocol, and
makes extra protocol-specific parameters
available.
- Danfoss FC
- Modbus RTU
MG07A102