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HOST COMPUTER
5
3 4
2
1
8
7
6
HUB
7188EX-256
7188EX-256
Ethernet 10M
Ethernet 10M
RS-232
device
To Ethernet Router
RS-232
device
RS-485
device
device
RS-485
device
RS-232
device
RS-232
+
X503
X503
+
HOST COMPUTER
5
3 4
2
1
8
7
6
HUB
7188EX-256
7188EX-256
Ethernet 10M
Ethernet 10M
RS-232
device
RS-232
device
RS-485
device
device
RS-485
device
RS-232
+
X509
X509
+
DI*4
D0*4
RS-232
device
DI*4
D0*4
device
RS-232
RS-232
device
GND
GND
7188E Series Hardware User’s Manual, 2004, v2.2, 7MH-016-22 ----- 85