3.8.9. 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 decentral 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 in-
puts and
Illustration 3.13: 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
OR
•
0/4-20 mA by mounting a 500
Ω
resistor across terminals
•
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 VDC.
3. VLT HVAC Selection
VLT
®
HVAC Drive Design Guide
74
MG.11.B2.02 - VLT
®
is a registered Danfoss trademark
3
Содержание VLT series
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