8 Ethernet module User’s Manual
Chapter 1 Ethernet Module (EN311) Overview
1
(5) Other features
The EN311 can connect to either a 10BASE5 or a 10BASE2 network. A 10BASE5 or
a 10BASE2 can be simply selected by a switch on the front panel, although
simultaneous connection to both networks is not possible.
(a) 10BASE5
Transmission method: Baseband
Data transmission rate: 10 Mbps
Maximum segment length: 500 meters
Number of nodes per segment (Number of MAUs): 100
Minimum distance between MAUs: 2.5 meters
This network uses 50W coaxial cable as the transmission cable.
The EN311 can implement systems such as the one shown in the following figure
using 10BASE5 coaxial cable.
Figure 1-7 10BASE5
Usage Recommendations
• Do not exceed the maximum cable length (500 m) per segment or the maximum number of
MAUs (100) in systems using 10BASE5.
• Adjacent MAUs must be mounted at least 2.5 meters apart in systems using 10BASE5.
• The AUI cable length must not exceed 50 meters in systems using 10BASE5.
MAU
Maximum
length of
meters
10BASE5 coaxial cable
Terminator Terminator
AUI
cable
MAU
E
N
3
1
1
E
N
3
1
1
S controller
S controller
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