Descriptions 10-3
Centrifuge 5804/5804 R and 5810/5810 R
10 Descriptions
Power supply unit
The power supply unit consists of the components transformer, rectifier bridges GL_2, GL_3, voltage
regulator SPR1 or SPR2 and filter capacitors.
• Transformer with integrated thermal fuse
primary 1x 230-V coil (optional: fuse T 0.160 A IEC)
or
1x 120-V coil (optional: fuse T 0.300 A UL)
secondary no-load voltage 11.2 V fuse: Polyswitch RXE050
24.8 V fuse: Polyswitch RXE110
• SPR1 supplies5 Vstabilized, potential free voltage
• SPR2 supplies24 Vstabilized, potential free voltage
• non-stabilized DC voltage as a driver voltage for the locking mechanism of the lid
Apart from that SPR1 supplies a reset signal if the voltage drops below 4.8 V.
Central control unit
The following components are part of the central control:
– processor SAB80C517A (IC1)
– EPROM 27C512 (IC3) with the operating system of the device
– an address latch 74HCT573 (IC2)
– an EEPROM FM24C04 (IC4)
The processor works with a cycle frequency of 12 MHz which is generated by an external oscillator. This
oscillator is designed as an oscillatory circuit consisting of a12 MHz quartz and two 22 pF capacitors.
The operating system of the centrifuge is stored on the EPROM.
With the EEPROM it is possible to store current operating parameters such as the rotational speed, the
duration of the last run, the operating hours etc. These data remain in the EEPROM even when the
centrifuge is switched off, they can be called up when the centrifuge is switched back on.
Apart from that the selectable programs are stored in the EEPROM.
MSTM/KW/0408
To Next Page
Loading...
