ALLEN BRADLEY 1747-L551 PLC Processor

Communicating with Devices on an Ethernet Network
G–3
Ethernet Channel 1 8-Pin 10Base-T Connector
The Ethernet connector is an RJ45, 10Base-T connector. The pin-out
for the connector is shown below:
Pin
1 TD+
2 TD–
3 RD+
Pin Name
4 not used by 10BASE-T
5 not used by 10BASE-T
6 RD–
7 not used by 10BASE-T
8 not used by 10BASE-T
When to use straight-through and cross-over pin-out:
• SLC 5/05 Ethernet port to 10Base-T Ethernet hub cables utilize a
straight-through pin-out (1–1, 2–2, 3–3, 6–6).
• Direct point-to-point 10Base-T cables connecting the SLC 5/05
Ethernet port directly to another SLC 5/05 Ethernet port (or a
computer 10Base-T port) require a cross-over pin-out (1–3, 2–6,
3–1, 6–2).
Cables
Shielded and non-shielded twisted-pair 10Base-T cables with RJ45
connectors are supported. The maximum cable length between an
SLC 5/05 Ethernet port and a 10Base-T port on an Ethernet hub
(without repeaters or fiber) is 100 meters (323 feet). However, in an
industrial application, the cable length should be kept to a minimum.
Publication 1747-6.2