GE Datex-Ohmeda S/5 - Parameter Modules; Figure 6 General Structure of Parameter Modules with Patient Isolation

Datex-Ohmeda S/5 Anesthesia and Critical Care Monitors
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Document no. M1137263-04
2.6 Parameter modules
Figure 6 General structure of parameter modules with patient isolation
The detailed structure of a parameter module depends on the specific needs for each
individual parameter. However, some common parts are used in the parameter modules. The
electronics inside the module is usually divided into isolated (floating) and non-isolated
sections. Typically, the non-isolated section consists of buffers to interface the parameter
module to the module bus while the rest of the electronics is located in the isolated section. The
isolated section includes the microcontroller together with memory components, the front-end
analog electronics (amplifiers, etc.) and sensor drivers.
Module Bus
Patient isolation
Isolation
transformer
+15 V
Opto
isolation
RS485
drivers
Data
Reset
+5 V
±12 V
CPU
ke
ys
Analog
electronics
A/D
converter
RAM
EEPROM
Peripheral
drivers
Patient
ke
ys
Module
keys