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The following illustration shows all the drive control terminals. Applying start (terminal 18), connection between terminals 12-27,
and an analog reference (terminal 53 or 54, and 55) make the drive run.
The digital input mode of terminal 18, 19, 27, and 29 is set in parameter 5-00 Digital Input Mode (PNP is default value).
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12 20 55
18
19
27 29 42 54
45 50 53
DIGI IN
61 68 69
N
P
COMM. GND
+24 V
GND
GND
10 V OUT
10 V/20 mA IN
0/4-20 mA A OUT/DIG OUT
BUS TER.
OFF ON
DIGI IN
DIGI IN
DIGI IN
0/4-20 mA A OUT/DIG OUT
10 V/20 mA IN
Illustration 32: Control Terminals
6.4 Setting Up RS485 Serial Communication
6.4.1 RS485 Features
RS485 is a 2-wire bus interface compatible with multi-drop network topology. This interface contains the following features:
Ability to select from the following communication protocols:
FC (default protocol)
Modbus RTU
Functions can be programmed remotely using the RS485 connection or in parameter group 8-** Communications and Options.
A switch (BUS TER) is provided on the control card for bus termination resistance.
N O T I C E
Altering between the supported communication protocols can be accessed and changed via the LCP as parameter 8-30 Protocol is
not available in VLT® Motion Control Tool MCT 10.
6.4.2 Configuring RS485 Serial Communication
Procedure
Connect RS485 serial communication wiring to terminals (P RS485) 68 and (N RS485) 69.
Use shielded serial communication cable.
Properly ground the wiring. Refer to 6.5.5 EMC-compliant Electrical Installation.
AJ330233902305en-000201 / 130R0596 | 51Danfoss A/S © 2021.05
Electrical Installation
Considerations
VLT® Compressor Drive CDS 803
Design Guide
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