Danfoss VLT HVAC Drive FC 102, Programming Manual, Page: 202 / 250

3.24 Parameters: 26-** Analog I/O Option MCB 109
The analog I/O option MCB 109 extends the functionality of VLT
®
HVAC Drive frequency converters, by adding a number of
additional, programmable analog inputs and outputs. This could be especially useful in building management system instal-
lations where the frequency converter may be used as de-central I/O, obviating the need for an outstation and thus
reducing cost.
130BA382.10
M M
M
P T
T
T
H
Illustration 3.82 Analog I/O Option MCB 109
Analog I/O Carsd Control Card Power card
Room t
emper
atur
e
Supply t
emper
atur
e
O
ut
door t
emper
atur
e
Hea
ting C
oil
Cooling c
oil
Dampers or Hea
t r
ec
ov
er
W
heel
Humidifier D
uc
t P
ressur
e
Humidit
y sensor
Humidifier steps
or
Cooling steps
RELA
Y1
RELA
Y2
1 2 3 10 11 12 4 5 6 7 8 9 12 13 18 19 27 29 32 33 20 37 39 42 50 53 54 55 01 02 03 04 05 06
130BA381.10
X42
AIN AIN AIN AOUT AOUT AOUT 24VDC 24VDC DIN DIN DIN/DOUT DIN/DOUT DIN DIN AOUT AIN AIN
Illustration 3.83 Analog I/O Option MCB 109
Illustration 3.82 a typical air handling unit (AHU). As can be seen, the addition of the analog I/O option offers the possibility
to control all of the functions from the frequency converter, such as inlet-, return- and exhaust dampers, or heating/cooling
coils with temperature and pressure measurements being read by the frequency converter.
Parameter Descriptions
VLT
®
HVAC Drive FC 102
200 Danfoss A/S © 03/2015 All rights reserved. MG11CE02
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