Datex-Ohmeda S/5 PRESTN, Technical Reference Manual Slot

Page: 28 / 84

Datex-Ohmeda S/5 monitors
22
Document No. 8005571-1
Serial communication
An RS485 type bus driver makes the serial communication between the module and the frame.
Data transmission rate is 500kbps.
RS 485
DRIVER
C
O
N
N
E
C
T
O
R
T
O
S
T
P
/E
C
G
B
O
A
R
D
M
O
D
U
L
E
BUS
CONNE
CT
OR
DATA
NDATA
RECEIVE DATA
SEND DATA
SEND/RECEIVE
N
IB
P
B
O
A
R
D
C
O
N
T
R
O
L
LE
R
S NIBP BOARD
NIB
P
_com
m
unication.vsd
Figure 11 Serial communication of NIBP board
RS 485
DRIVER
S
T
P
B
O
A
R
D
C
O
N
N
E
C
T
O
R
DATA
NDATA
RECEIVE DATA
SEND DATA
SEND/RECEIVE
S
T
P
B
O
A
R
D
C
O
N
T
R
O
L
LE
R
STP BOARD
PA
T
IENT
ISO
LAT
IO
N
S
T
P
_com
m
unication.vsd
Figure 12 Serial Communication and Isolation of STP board
RS 485
DRIVER
E
C
G
B
O
A
R
D
C
O
N
N
E
C
T
O
R
DATA
NDATA
RECEIVE DATA
SEND DATA
SEND/RECEIVE
E
C
G
B
O
A
R
D
C
O
N
T
R
O
L
LE
R
ECG BOARD
PA
T
IENT
ISO
LAT
IO
N
DIRECT ECG (PWM) DIRECT ECG (PWM)
E
C
G_com
m
unication.vsd
Figure 13 Serial Communication and Isolation of ECG board