Embraco Fullmotion CF10C - OPERATION; Frequency Control Mode

Chapter 4
OPERATION
The Fullmotion CF10C Inverter have support for Serial, Frequency and Drop-In com-
munication modes.
!!
WARNING
!!
NOTICE
CAUTION
!!
• The inverter is assembled with all commu-
nication modes and the control mode is
chosen automatically by the inverter.
4.1 Frequency control mode
In this operation mode the compressor speed is controled through a frequency sig-
nal sent to the inverter. Usually this signal is provided by an electronic thermostat.
The frequency signal is a digital square wave and its characteristics are described
on Signal specication table and Figure below.
Signal specications
Voltage range -5 V to +15 V
OFF state -5 V to +0.7 V
ON state +4.5 V to +15 V
Maximum duty-cycle 70%
Minimum duty-cycle 30%
Maximum current 15 mA @ 15 V
-5V
0.7V
4.5V
15V
O state
Indenite state
On state
From
0.7 V to 4.5 V the inverter behaviour is indenite, therefore, it is not recommended
to use signals within this range. The following gure presents a graphic example of
an input frequency signal of 125 Hz sent to the inverter. The digital signal duty-cycle
can vary in the range from 30% to 70%.
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