Theory of Operation 7
1100 Series WS MWS Reference Manual 219
Fan Drive
The fan speed (two speeds are possible) is controlled by the main processor
according to the internal heat distribution inside the module. The fan provides
a PWM signal which is proportional to the revolution. This fan status signal is
used for diagnostics.
Onboard Battery
An onboard lithium battery buffers the electronic memories when the module
is turned off. For safety information on lithium batteries see “" on page 278.
Autosampler-Specific Electronics
The autosampler specific functions provided by the electronics are:
• Closed loop control of three axis vial handling servos
• Electric valve control
• Needle unit control
• Metering device control
• Peristaltic pump control
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