I/O modules • 259
Data exchange modules 750-654
Modular I/O System
ETHERNET TCP/IP
:$*2
M
M
S
S
TxD
+
RxD
-
RxD
+
TxD
-
:$*2
M
M
S
S
TxD
+
RxD
-
RxD
+
TxD
-
Point to point connection
Internal
control unit
RxD+
RxD-
7 6 5 4 3 2 1 0
Output byte 0
7 6 5 4 3 2 1 0
Output byte 1
7 6 5 4 3 2 1 0
Output byte 2
7 6 5 4 3 2 1 0
Output byte 3
7 6 5 4 3 2 1 0
Output byte 4
7 6 5 4 3 2 1 0
Input byte 0
7 6 5 4 3 2 1 0
Input byte 1
7 6 5 4 3 2 1 0
Input byte 2
7 6 5 4 3 2 1 0
Input byte 3
7 6 5 4 3 2 1 0
Input byte 4
TxD+
TxD-
M
S
7 6 5 4 3 2 1 0
Control byte
7 6 5 4 3 2 1 0
Status byte
EN
+5V
10k
10k
Organization of the input and output data:
The module is a combination of a special function input and output module
with 1 x 32 (40) Bit input and output data. The transfer of the data to be
transmitted and the received data is made via 5 input and 5 output Bytes. One
control byte and one status byte are used to control the floating data.