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Model EN516/EN524 Ethernet Hub Installation Guide
RJ-45 Connector
The RJ-45 connector (shown in the illustration with an RJ-45 plug) is used to connect
workstations, hubs, and switches through unshielded twisted pair cable. The RJ-45 connector
accepts four-pair Category 3 or Category 5 UTP cable. Only two pairs are used for 10BASE-T
wiring.
AUI Connector
The AUI connector for the hub connects the hub through an external transceiver to other devices.
An inter-repeater fiber link using a 10BASE-F transceiver is an example of such an application.
RJ-45 Connector
Pin Assignment
Normal Assignment:
Ports 1–15 on the
Model EN516 hub
Ports 1–23 on the
Model EN524 hub
Uplink Assignment:
Port 16 on the
Model EN516 hub
Port 24 on the
Model EN524 hub
1 Input Receive Data + Output Transmit Data +
2 Input Receive Data - Output Transmit Data -
3 Output Transmit Data + Input Receive Data +
6 Output Transmit Data - Input Receive Data -
4, 5, 7, 8 Not used Not used
AUI Connector Pin Assignment Signal
1, 4, 11, 14, 15 Ground
2CI-A
3DO-A
5DI-A
6 + 12 V DC return
7, 8 Not used
9CI-B
10 DO-B
12 DI-B
13 + 12 V DC (500 mA maximum)
711EA
18
12345678
8148EA
1 8
15 9
AUI connector