Dräger Medical Babytherm 8004, Technical Documentation Manual

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Function Description Babytherm 8004/8010
Control and feedback of the infrared elements
An optocoupler controls the triac which supplies the infrared elements with
mains voltage. This current flow generates a feedback signal via the optocou-
pler.
Safety relay of the infrared elements
In the event of a malfunction (e.g. “Inop”), the safety relay switches off the
mains voltage to the infrared elements.
Relay for the energy-saving lamps and phototheray assembly (option)
The relays supply the energy-saving lamps and the the phototheray assem-
bly (option) with mains voltage.
Control of the Central Alarm PCB
An opto-triac on the WT Relay PCB controls the central alarm light. The
forced-tripped opto-triac supplies the Central Alarm PCB with mains voltage.
1.2.5 WT Controller PCB The WT Controller PCB carries the following subassemblies:
– Microcontroller
– Quartz
– EPROM
– EEPROM
– RAM
– Watchdogs
– Driver modules
– Multiplexer and A/D converter