GE Datex-Ohmeda S/5 Series, Техническое справочное руководство

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Display Unit for F-CM(C)1 (Rev. 05), F-CM(C)REC1 (Rev. 01)
11
Document no. M1144956-003
Figure 7 Central Processing Board, block diagram
2.6.1 Ethernet interface
The data transformer is designed by Datex-Ohmeda and it is hospital grade approved.
Adapter’s 10BASE-T is an interface with low-pass filters on the unisolated side of the
transformer. On the isolated side there is a common mode choke for both transmitting and
receiving lines.
The three LEDs on the board, which are not seen from the outside, indicate the following things:
activity on the network, collision detection and a good link in 10BASE-T interface.
The activity LED flashes when communication packets are detected in the Datex-Ohmeda
Network. The collision detection LED indicates a packet collision on the network. The collision
detection LED should flash only occasionally, otherwise there may be a physical layer
problem. The good link LED indicates whether or not the communication link to the HUB is
functional. The good link LED should always be lit.
SRAM
Memory
Ethernet
Controller
C
P
U
B
U
S
Central Processing Board
Serial
EEPROM
10BaseT
C
P
U
B
U
S
ID-PLUG
Interface
ID-PLUG
display_cntr
l_pr
oc
_br
d
_digr
m
.vsd