Tuttnauer 2301006, Руководство по эксплуатации и техническому обслуживанию

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Page 13 of 117 pages
2.8 Control System
The Main Board
Contains the electronic microcontroller system, which controls and monitors the
physical parameters of the process and performs the operation sequence of the
machine according to the selected program.
The dimensions of the main board are 30x15x10cm.
The main board contains the following elements:
♦
16 digital inputs
♦
24 digital outputs
♦
6 PT 100 inputs
♦
7 Inputs of 4 –20mA
♦
voltage inputs for the electrode for water level
♦
2 analog outputs of 4 –20mA
♦
Serial ports
♦
CPU.
♦
2 ADC's for reading temperature and pressure sensors.
Each ADC maintains at least 3 temperature sensors (PT100), and 3 pressure
sensors (4 –20mA).
All connections to the main board are via rigid contactors for quick, efficient and
dismantling and transport.
Digital Inputs
The digital inputs are
φ
/1:
♦
open/close for door positions
♦
safety cut-off switches
♦
pressure cut-off switches
♦
cut-off switches for water level
The input voltage will not exceed 24VDC. The input must be protected from high
voltages by means of an Opto-coupler.
Digital Outputs
Digital outputs are used to activate solenoid valves, relays and SSR for the pump.
The command is 24 VDC, but this will be able to be changed and allowed to move
between 10-30VDC.
Each output is up to 2A, however all the outputs together will not have a capacity
greater than 110 W.
Analog inputs for Reading Temperature
Temperature is measured using PT100.
The system contains 2 ADC components, each component being able to read 3
PT100 sensors. The system contains circuits with a straight connection of PT100
(3 wires) that do not interchange on the way.
The measurement range is 77-302
o
F(25-150ºC).
The resolution range is 32.18
o
F (0.1ºC).
The accuracy of the measure is 33.8
o
F (1ºC).
The accuracy surrounding the sterilization temperature at the time of sterilization is
in the range of + 32.9
o
F (0.5ºC).
Calibration of the temperature circuit requires a special code.