Danfoss VLT Design Guide

Illustration 3.11 Connection to 24 V Backup Supplier (A5-C2).
3.1.9 Analog I/O option MCB 109
The Analog I/O card is supposed to be used in e.g. the
following cases:
•
Providing battery back-up of clock function on
control card
•
As general extension of analog I/O selection
available on control card, e.g. for multi-zone
control with three pressure transmitters
•
Turning frequency converter into de-central I/O
block supporting Building Management System
with inputs for sensors and outputs for operating
dampers and valve actuators
•
Support Extended PID controllers with I/Os for set
point inputs, transmitter/sensor inputs and
outputs for actuators.
Illustration 3.12 Principle diagram for Analog I/O mounted in
frequency converter.
Analog I/O configuration
3 x Analog Inputs, capable of handling following:
•
0 - 10 V DC
OR
•
0-20 mA (voltage input 0-10 V) by mounting a
510 Ω resistor across terminals (see NOTE)
•
4-20 mA (voltage input 2-10 V) by mounting a
510 Ω resistor across terminals (see NOTE)
•
Ni1000 temperature sensor of 1000 Ω at 0° C.
Specifications according to DIN43760
•
Pt1000 temperature sensor of 1000 Ω at 0° C.
Specifications according to IEC 60751
3 x Analog Outputs supplying 0-10 V DC.
Drive Selection
VLT
®
Refrigeration Drive Design Guide
42 MG16G102 - VLT
®
is a registered Danfoss trademark
3
3

Danfoss VLT Specifications

General

Frequency	50/60 Hz
Enclosure	IP20, IP21, IP55, IP66
Series	VLT
Control Technique	Flux Vector Control
Output Voltage	0-Vinput
Control Method	Fieldbus
Communication Interface	PROFIBUS, CANopen
Protection Features	Overload, Overvoltage, Undervoltage, Short Circuit, Ground Fault
Cooling Method	Liquid Cooled
Storage Temperature	-25°C to +70°C
Relative Humidity	5-95% non-condensing
Altitude	Up to 1000m (3280ft) without derating, up to 4000m (13120ft) with derating
Operating Temperature	-10°C to +50°C (14°F to 122°F)