Embraco Fullmotion CF10C - Serial Control Mode; Serial Specifications and Internal Circuit

CHAPTER 4. OPERATION 33
CF10C INVERTER
Neutral
Phase
4
On/Off
Thermostat
3
Drop-In
–
N
L
CF10C INVERTER
Figure 4.3: Energized Contact Drop-In connection
!!
WARNING
!!
NOTICE
CAUTION
!!
• When opened, the thermostat impedance
must be higher than 380 kΩ. Otherwise
the compressor can run continuously, with-
out ever turning o.
!!
WARNING
!!
NOTICE
CAUTION
!!
• All main parameters, such as minimum
and maximum speed are described at
compressor datasheet.
4.3 Serial control mode
This option is used when an electronic thermostat controls the CF10C Inverter uses
a serial communication protocol. Based on Embraco protocol it is possible to dene
the compressor speed and check other parameters.
4.3.1 Serial specications and Internal Circuit
The Serial Control mode has an isolated input stage provided by the usage of op-
tocouplers. The circuit on Figure 4.4 shows the electrical connections to perform
serial communication between an electronic thermostat and Fullmotion CF10C In-
verter serial connector (CN204).
The input resistance for serial communication, shown in Figure 4.4, is 1.2 kΩ.