Danfoss VLT Midi Drive FC 280 Instruction Manual page 20

Electrical Installation
L1(N) L2(L)
U V
4 4
Motor
Figure 4.10 Connecting the Mechanical Brake to the
Adjustable Frequency Drive
4.8.5 RS-485 Serial Communication
Connect RS-485 serial communication wiring to terminals
(+)68 and (-)69.
•
Shielded serial communication cable is
recommended.
•
See chapter 4.3 Grounding for proper grounding.
Figure 4.11 Serial Communication Wiring Diagram
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
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®
Midi Drive FC 280
For basic serial communication set-up, select the following:
1. Protocol type in parameter 8-30 Protocol.
2. Adjustable frequency drive address in
parameter 8-31 Address.
3. Baud rate in parameter 8-32 Baud Rate.
•
Two communication protocols are internal to the
adjustable frequency drive. Follow the motor
Command circuit
manufacturer wiring requirements.
220 V AC
Freewheeling
•
Functions can be programmed remotely using
diode
the protocol software and RS-485 connection or
in parameter group 8-** Communications and
Options.
•
Selecting a specific communication protocol
changes various default parameter settings to
match the specifications of the protocol, and
makes extra protocol-specific parameters
available.
- Danfoss FC
- Modbus RTU
MG07A122