Burkert Type 8620 - Manual (Page 19)

mxCONTROL Type 8620
Page 19
Communication
SD card SD card capacity: minimum 64 MB, maximum 2 GB,
formatted with FAT16 file system
Up-/download of configuration data
and parameters via USB or SD card
Data-logging on SD card
Firmware update via USB
USB slave interface standard USB interface for PC communication
Ethernet interface optional: Ethernet interface for easy diagnosis including Web
Server and email option
Extension bus interface CAN-based bus for connection of extension units
(e.g. I/O extensions)
Controller structure
Number of control loops max. 8 active control loops
Controller outputs/Module outputs 1) On/Off
2) Pulse frequency modulated (PFM)
3) Pulse width modulated (PWM)
4) Analog
Sample period approx. 50 ms (with 1…4 active control loops);
approx. 100 ms (with more than 4 active control loops)
User configuration Cascade control possible; inputs, outputs and control function
designations can be changed via configuration file
Characteristics of modules
General PID control PID process controller for fixed value, subsequent value or
cascade control
Conductivity control On/Off or PI control - continuous dosing through PFM, PWM or
4…20 mA analog output,
automatic or manual drain
Corrosion display No controller function, only display of measuring values;
impact on general alarm output
pH control PI control - continuous dosing through PFM, PWM or 4…20
mA analog output
Module for dosing of oxygen scavenger media Proportional dosing for flow and oxygen content depending on
flow with or without temperature input
Chlorine / Redox Control PI control - continuous dosing through PFM, PWM or 4…20
mA analog output
Batch-Dosing Allows batching of a chemical based on volume of water
added
Biocide dosing 14-day program, 8 dosing events per channel/per day; Pre-
bleed function to optimize biocide kill time
Monitor module Display of process values
Totalizer function Single or dual channel flow totalizer (each having two
manually resetable totalizers)
Further functionalities Password protection, filter; selection of engineering units,
alarm; inverse function
Norms and standards
Environment standards IEC/ DIN IEC 60068
EMC standards EN 61000, EN 55011
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