Danfoss VLT AHF 005 User Manual

4.
•
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-
-
-
-
•
•
•
•
1.
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-
2.
3.
Set switches A53 and A54 to select the signal type (U = voltage, I = current).
Example
e30bf146.10
BUS TER.
OFF-ON
A53 A54
U- I U- I
1
2
N O
1
2
N O
1
2
N O
1
2
N O
Illustration 62: Location of Switches A53 and A54
5.12 Setting Up RS485 Serial Communication
5.12.1 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, FC MC, FC option
Modbus RTU
Metasys N2
FLN
BACnet
Functions can be programmed remotely using the protocol software and RS485 connection or in parameter group 8-** Commu-
nications and Options.
Selecting a specific communication protocol changes various default parameter settings to match the specifications of the pro-
tocol, making more protocol-specific parameters available.
Option cards for the drive are available to provide more communication protocols. See the option card documentation for in-
stallation and operation instructions.
A switch (BUS TER) is provided on the control card for bus termination resistance.
5.12.2 Configuring RS485 Serial Communication
Procedure
Connect RS485 serial communication wiring to terminals (+) XD2.2 and (-) XD2.3.
- Use shielded serial communication cable.
- Properly ground the wiring. Refer to
5.8.6 Connecting to Ground.
Select the protocol type in parameter 8-30 Protocol.
Select the drive address in parameter 8-31 Address.
AQ262141314214en-000301 / 130R0880 | 107Danfoss A/S © 2021.11
Electrical Installation
VLT® HVAC Drive FC 102
Operating Guide

Danfoss VLT AHF 005 Specifications

General

Brand	Danfoss
Model	VLT AHF 005
Category	DC Drives
Language	English