SEQUENCER WITH
DIFFERENTIAL PRESSURE
SWITCH
Technical notice
FI 72.0567.0221E
Page 6 / 45
CENTRAL UNIT BOARD :
This board is located in the master box/cabinet. It is the heart of the SFX+V2 system.
It contains all the filter configuration as well as its settings.
It constantly communicates with the slave boxes and the HMI screen.
It processes the exchanges coming from the Modbus RTU client communication.
Depending on the configuration, it can be equipped with a pressure sensor for measuring the load loss pressure,
4-20mA analog input and output, several digital inputs and relay outputs.
Note: a kit exists to backup or restore the SFX+V2 settings to or from a disk file. This kit, consisting of a USB cord
and PC software, connects to this card. See the associated documentation (FI72.05666)
Red led:
Permanently on, signal of the
presence of the 24VDC
power supply
Blue LED: flashes regularly (1s) if the central unit is working
Yellow LED: representative of exchanges with the HMI screen
Green LED: representative of exchanges with Modbus client communication (or
exchange with gateway in the case of Profibus communication,
TCP / IP, Profinet ...)
Red LED: representative of exchanges with the slave boxes
