Standalone MMC Hardware Manual - MMC ETHERNET TCP/IP OPTION MODULE
Table 7-2: Ethernet Port Pin Descriptions Function
Notes
Pin
Receive Data +
Receives data from connected drives.
3
Receive Data -
Receives data from connected drives.
6
Transmit Data +
Transmits data to connected drives.
1
Transmit Data -
Transmits data to connected drives.
2
Shield Ground
Provides a path for shield current through the chassis to an external single point ground.
Shell
Table 7-3: Ethernet Port Pin Assignments Pin
Signal
In/Out
1
Transmit Data +
Out
2
Transmit Data -
Out
3
Receive Data +
In
4
Termination Resistors
5
Termination Resistors(a)
In
6
Receive Data -
In
Pin Sequence
RJ-45 a
7
Termination Resistors
(a)
8
Termination Resistors
(a)
Connector Shell
Shield
In
In In
1 8
In
a. Pins 4, 5, 7, and 8 are tied to termination resistors on the Module. Standard Ethernet cables contain 8 wires. The Module only uses 4 of these wires as shown. Connecting the 4 unused wires to pins 4, 5, 7, and 8, (as will be done in a standard Ethernet cable) reduces noise that can be induced from the unused wires to the Transmit and Receive wires.
156
Kollmorgen - April 2010