Ethernet connection

The connection to the Ethernet bus is made via an RJ45 plug (a Western plug).

Ethernet connection 1:
RJ45 plug

Pin assignment of the RJ45 plug

PIN

Signal

Description

1

TD +

Transmit +

2

TD -

Transmit -

3

RD +

Receive +

4

-

reserved

5

-

reserved

6

RD -

Receive -

7

-

reserved

8

-

reserved

Direct connection between PC with Ethernet card and BC9191

The BC9191 supports auto-crossing. A crossed or an uncrossed Ethernet cable can be used to connect a PC directly to the BC9191. The internal switch in the BC9191 detects this automatically.

Ethernet connection 2:
BC9191 - Auto-crossing