Illustration 3.22: Connection to 24 V backup supplier (A5-
C2).
3.6.9 Analog I/O option MCB 109OPCAIO Analog I/O Option Module
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.
3 VLT AQUA Selection VLT
®
AQUA Drive Design Guide
72
MG.20.N5.02 - VLT
®
is a registered Danfoss trademark
3
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