130BE201.11
L1(N) L2(L)
L3
U
V
W
02
01
A1
A2
Frequency converter
Output
relay
Command circuit
220 V AC
Mechanical
brake
Shaft
Motor
Freewheeling
diode
Brake power circuit
380 V AC
Output
contactor
input
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
for proper grounding.
61
68
69
+
130BB489.10
RS-485
Figure 4.11 Serial Communication Wiring Diagram
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
manufacturer wiring requirements.
-
Danfoss FC
-
Modbus RTU
•
Functions can be programmed remotely using
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.
Electrical Installation
VLT
®
Midi Drive FC 280
18
Danfoss A/S © 11/2015 All rights reserved.
MG07A122
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