Dräger Medical Zeus, Техническая документация инструкция

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Function Description Zeus
are delivered by the motor electronics. The motor temperature is evaluated,
as are the other temperature sensors. 6 LEDs are provided for output of sta-
tus signals. The following LEDs are interesting for service work:
– 12 V supply voltage = LED V405
– 5 V supply voltage = LED V402
If only LED V302 of the 4 LEDs between the SUB-D connectors is lit the hard-
ware is in test mode.
3.3 Vent Power PCB
3.3.1 Purpose The Vent Power PCB contains the power electronics to activate the blower
and the external valves. It provides the link between the valve control and the
pneumatic system.
3.3.2 Function The respective power stages can be disabled by an external signal ( Figure
5 ).
Figure 5 Vent Power PCB block diagram
This signal is generated by an independent monitoring computer. In addition
to the power stages, the sender information from the TurboVent and the sta-
tus signals of the various output stages are processed and passed on for
evaluation to the TurboVent control computer. The supply voltage of the Tur-
boVent is 48 V DC and that of the valves is normally 24 V. Because of the dif-
ferent supply voltages and the substantial peak currents in the TurboVent
activation circuit these blocks are electrically isolated by optocoupler.