Siemens SC 7000 Service Manual page 23

Chapter 2: Theory of Operation
1 Introduction
Computer Archictecture
40
48
Megabytes/sec
Processor Bridge
Remote Comm.
Transmitter
SC 7000 /
SC 9000XL
IPS
Remote Comm
Receiver
3
Megabytes/sec
Figure 2-1SC 7000 / SC 9000XL Bus Structure
ASK-T898-03-7600
7k9kXLTM.c2.CD_ROM.fm/04-99/kaupp
The SC 7000 and SC 9000XL are high-end single-board patient monitors.
The board provides the following parameters; 6 lead ECG, Respiration, two
Temperatures, SpO
connector for an etCO
ports for additional parameters. It has connectors for flat panel display,
simultaneous CRT, user interface, audio, batteries, NBP pneumatic
assembly, chart recorder, analog out, defib sync, memory card, Uarts, and
"Pick & Go" docking connector. The board contains the computer, power
supply and patient isolated front ends.
Hardware architecture of the monitors is based on a dual processor design
using two Motorola MPC860s with onboard cache. The main processor is
responsible for graphics and communications, while the second processor
is dedicated to data acquisition and algorithm processing. A DSP
subsystem preprocesses the front end data.
There are three major bus structures within the system; MAIN processor
bus, FRONT END bus, and REMOTE COMM bus (see
buses operate at different speeds and efficiency. The FRONT END bus and
REMOTE COMM bus have multiple bus masters and common memory to
allow exchange between I/O devices.
The REMOTE COMM bus is special in that it may be connected and
disconnected without causing a monitor fault. This patented connect and
disconnect function of the monitor is advertised as "Pick and Go". This
allows monitors to be moved to different locations within the hospital and to
connect to multiple REMOTE COMM links without interruption of
monitoring. The traditional central station alarm function of alarming when
the patient monitor is suddenly disconnected from the network is modified
in this system by ensuring that a disconnect is intentional. A redundant
signal is used to verify a true "pick-and-go" such that a single fault does not
prevent an alarm by imitating a "pick-and-go."
32
Local Memory
32 40
48 Megabytes/sec
860
50MHz Processor
16 REMOTE COMM BUS
Common
Memory
Siemens Medical Systems, EM-PCS Danvers
NOT A CONTROLLED DOCUMENT
, NBP, four IBPs, Cardiac Output, an interface
2
cartridge, and two onboard 5 watt patient isolated
2
MAIN BUS
Memory
Graphics
Expansion
FRONT END BUS
Common Memory DSP
Network
Processor
Adapter
Figure 2-1). The
I/O
Pod I/O
7