Danfoss MCA 109 Fact sheet

VLT® BACnet MCA 109

VLT® HVAC Drive integrates and communicates seamlessly with all HVAC devices mastered by
Building Management Systems via the BACnet protocol. HVAC-specic features make it economical,
exible and user friendly.

The VLT® BACnet MCA 109 is a plug­and-play solution that optimizes the
use of VLT® HVAC Drive together with
building management systems using
the BACnet MS/TP protocol.

Lowest cost of ownership

The modular concept of the VLT®
HVAC Drive, allows you to pay only for
features you need, customize your
solutions and minimize system costs.
The option makes it easy to control or
monitor points required in typical
HVAC applications.

Optimized communication

Beside standard functionality, the
option features three additional func­tions:

n

COV, Change Of Value

n

Read/Write Property Multiple

n

Alarm/Warning handling

These three features lower the trac
on the BACnet MS/TP Bus signicant­ly, and improves the overall perfor­mance of the BACnet..

This means that installing the VLT®
HVAC Drive with a VLT® BACnet
MCA109, system operation is faster
and the BMS controller is better
utilized.

Improve system performance

Via the BACnet option it is possible to
read all analogue and digital inputs
and control all analogue and digital
outputs of the VLT® HVAC Drive. All
inputs and outputs can be operated
independently of the VLT® HVAC
Drives functions and thus work as
remote I/O’s

This means that when integrating a
VLT® HVAC Drive into the control
system it is possible to save physi­cal I/O points, which typically would
demand a remote I/O block.

The VLT® BACnet MCA109 follows the
BACnet standards, and represents
Digital Inputs and Outputs in the
correct format. This eases the work for
operators and programmers, since it
shows the drives I/O with its corre­sponding objects.

Feature Benet

The built-in clock of the VLT® HVAC Drive
synchronizes with the system master clock via
BACnet

Device name, location and description can be
changed

Warnings and alarms come with
explanatory text

Power full range of services implemented Less load on the network, faster response

– Reads all inputs
– Controls all I/O’s on options

Accepts 3 separate feedbacks transmitted
over BACnet

COV supported for a number of objects

Read or write multiple points in one
telegram

No need for a battery that eventually will need
to be replaced

Time saved at servicing since the drive is
clearly identied

Faster maintaining because alarms are clearly
indicated and not shown by numbers.

– Reduced need for additional I/O devices
– Reduced physical space needed

Lower installation cost

–

Reduced cabling cost

The option sends data when they are changed.
Improves the throughput up to 50%

– Can transfer required points of the

VLT® HVAC Drive in one telegram

– Improved system performance

Facts about our products

Flexible choice

The VLT® HVAC Drive oers two
alternative BACnet MS/TP solutions:
The built-in BACnet features basic
functionality that makes it very well
suited for small installation, whereas
the MCA109 is well suited for installa­tions that requires a fast access to the
network, or where the BMS controller
would be heavily loaded.

Detailed information about
warnings and alarms

VLT® HVAC Drive provides detailed in­formation about alarms and warnings.
BMS controllers can monitor these or
let the drive send the alarm or warn­ing when they occur, and afterwards
get detailed information from the
drive.

Examples: Earth fault, short circuit,
over current, motor phase loss, motor
thermal condition (thermistor or ETR),
mains phase loss, live zero, Broken Belt,
No Flow, Dry Pump, End of Curve etc.

Simultaneous synchronization
of built-in clocks

VLT® HVAC Drives have a built-in clock
that synchronizes to the BMS network
clock via BACnet. This eliminates the
need for a battery in the drive.
Batteries must be manually ex­changed at a given time, which is
costly in larger installations.

Listed by BTL

*

The VLT® BACnet solution is listed
by BTL Testing Laboratory.

BACnet Interoperability
Building Blocks Supported

Data Sharing-ReadProperty-B (DS-RP-B)
Data Sharing-ReadPropertyMultiple-B (DS-RPM-B)
Data Sharing-WriteProperty-B (DS-WP-B)
Data Sharing-WritePropertyMultiple-B (DS-WPM-B)
Alarm and Event-ACK-B (AE-ACK-B)
Alarm and Event-Notication Internal-B (AE-N-I-B)
Alarm and Event-Information-B (AE-INFO-B)
Device Management-Dynamic Device Binding-A (DM-DDB-A)
Device Management-Dynamic Device Binding-B (DM-DDB-B)
Device Management-Dynamic Object Binding-B (DM-DOB-B)
Device Management-DeviceCommunicationControl-B (DM-DCC-B)
Device Management-TimeSynchronization-B (DM-TS-B)
Device Management-ReinitializeDevice-B (DM-RD-B)

* See the BTL’s homepage for the latest version listed.

Standard object types supported

n

Analogue input

n

Analogue output

n

Analogue value

n

Binary input

n

Binary output

n

Binary value

n

Device

n

Multi-state output

n

Notication class

Number of objects supported

Digital inputs 16

Digital outputs 32

Digital Values 200

Analogue inputs 7

Analogue outputs 7

Analogue values 46

Multistate output 1

Multistate input 1

Total 310

Built-in and tested from factory

The Danfoss BACnet option is avail­able factory installed and tested or
can be added to the VLT® HVAC Drive
as a eld installed upgrade in existing
installations.

Danfoss VLT Drives, Ulsnaes 1, DK-6300 Graasten, Denmark, Tel. [phone], Fax [phone]
www.danfoss.com/drives • [e-mail]

DKDD.PFO.610.A2.02 VLT® is a trademark of Danfoss A/S PE-MMSC 2014.09