9
VLT is a registered Danfoss trade mark
MG.10.P2.22
Installation
The following section describes the installation
procedures for the Modbus RTU option card.
For additional information on installation and
operation of the VLT, refer to the
VLT
Operating
Instructions
.
VLT adjustable frequency drive
contains dangerous voltages
when connected to line voltage.
After disconnecting from power
line, wait at least 14 minutes for
220 and 500 V units, for 550-600 V
units wait at least 30 minutes
before touching any electrical
components.
Only a competent electrician
should carr y out electrical
installation. Improper installation
of motor or VLT can cause
equipment failure, serious injury
or death. Follow this manual,
National Electrical Codes and
local safety codes.
CAUTION
!
CAUTION
!
Electronic components of VLT
adjustable frequency drive and
Modbus option card are sensitive
to electrostatic discharge (ESD).
ESD can reduce performance or
destroy sensitive electronic
components. Follow proper ESD
procedures during installation or
servicing to prevent damage.
It is responsibility of user or
installer of VLT adjustable
frequency drive to provide proper
grounding and motor overload
and branch protection according
to National Electrical Codes and
local codes.
Modbus
RTU Option
Card
Environmental
Requirements
Environmental requirements for the Modbus
option card are listed below.
Description
Requirement
Operating temperature
-5
°
F to +140
°
F (-20
°
C to +60
°
C)
Storage temperature
-40
°
F to +176
°
F (-40
°
C to + 80
°
C)
Humidity
5% to 95% relative, non-condensing
DANGER
!
WARNING
!
