B. Braun Vista basic Service Manual page 12

System Overview
Function Two independent software-controlled microprocessor systems
control and monitor the hardware. On the basis of their functions,
they are defined respectively as a control and a function proces-
sor. Both systems work with independent clock frequencies and
have access to different program and data memories, All safety-
relevant functions are handled by both processors and the results
are counter checked (CF- and FC-latch).
The input via the keypad is fed to both processors. Additionally
the acknowledgement signal of the ON/OFF key is fed to the
mains power supply logic (voltage E/A-TAS). The function proces-
sor has also access to this logic via E/A-INT,
Description of the voltage signals (see "Sign:
29. 1-5).
ile
Controt Signal
Test
71 NC-BatteryD
=] TN
ーー- fm-System
+5V 一
— Емета (МЕС)
UBS 6-16V
Mains
EAANT
IP 004
EA-TAS
Fig: 1-3
1-4 Vista basic 950971 Rev A (5/04)