1 Introduction
1.1 Purpose of the Manual
This manual provides information for safe installation and
commissioning of VLT
®
PTC Thermistor Card MCB 112 used
with a Danfoss VLT
®
frequency converter with Safe Torque
Off (STO). The manual is intended for use by qualified
personnel only.
VLT
®
PTC Thermistor Card MCB 112 is also referred to as
MS 220 DA.
The operating instructions are intended for use by
qualified personnel. Read and follow the operating
instructions to use the frequency converter safely and
professionally, and pay particular attention to the safety
instructions and general warnings. Keep these operating
instructions available with the frequency converter at all
times.
VLT
®
is a registered trademark.
1.2 Additional Resources
This manual is targeted at users already familiar with the
VLT
®
frequency converters. It is intended as a supplement
to the manuals and instructions available for download at
vlt-drives.danfoss.com/Support/Technical-Documentation/
.
Read the instructions shipped with the frequency
converter and/or frequency converter option before
installing the unit, and observe the instructions for safe
installation.
1.3 Document and Software Version
This manual is regularly reviewed and updated. All
suggestions for improvement are welcome. Please send
suggestions via email to
[email protected], including a
reference to the document version.
Table 1.1
shows the
document version and the changes applied.
Edition
Remarks
MG33V3xx
Replaces MG33V2xx.
Editorial changes.
Now covering the complete system.
Table 1.1 Document Version
1.4 Products Covered
The VLT
®
PTC Thermistor Card MCB 112 is available for the
following types of frequency converters:
•
VLT
®
HVAC Drive FC 102.
•
VLT
®
AQUA Drive FC 202.
•
VLT
®
AutomationDrive FC 302.
1.5 Functional Overview
1.5.1 Intended Use
The VLT
®
PTC Thermistor Card MCB 112 is intended to:
•
Protect electrical motors against inadmissible
heating due to overload.
•
Protect explosion-protected motors in explosive
atmospheres caused by gases, vapours, or mists,
Zone 1 and Zone 2, and/or in explosive
atmospheres caused by dust, Zone 21 and Zone
22. Refer to marking G for Zone 1 and Zone 2.
Refer to marking D for Zone 21 and Zone 22.
All functions in the MCB 112 serve to protect both non-
explosive-protected motors and explosive-protected
motors in regular operation and in case of failure.
The VLT
®
PTC Thermistor Card MCB 112 is designed in
accordance with EN 60947-8 (VDE 0660 part 0302). Only
connect PTC thermistor sensors according to DIN 44081
and 44082 (EN 60947-8).
NOTICE
The VLT
®
PTC Thermistor Card MCB 112 is only functional
if it is built into the frequency converter. The option
cannot be used as a stand-alone.
Introduction
Operating Instructions
MG33V302
Danfoss A/S © 01/2015 All rights reserved.
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