7
Ethernet Ports
RJ-45 Ports(Auto MDI/MDIX)
The RJ-45 ports are auto-sensing for 10Base-T, 100Base-TX or 1000Base-T devices connections. Auto
MDI/MDIX means that the switch can connect to another switch or workstation without changing the
straight-through or crossover cabling. See the figures as below for straight-through and crossover
cabling schematics.
RJ-45 Pin Assignments
(Table 2.2)
Table 2.2: RJ-45 Pin Assignments
Note:
“+” and “-” signs represent the polarity of the wires that make up each wire pair.
All ports on this industrial Ethernet switch support automatic MDI/MDI-X operation. Users can use
straight-through cables (see Figure 2.4) for all network connections to PCs, servers, other switches or
hubs. With straight-through cable, pins 1, 2, 3, and 6, at one end of the cable, are connected straight
through to pins 1, 2, 3 and 6 at the other end of the cable. The table below (Table 2.3) shows the
10BASE-T, 100BASE-TX, 1000BASE-TX MDI and MDI-X port pin outs.
Table 2.3: Ethernet Signal Pin Outs
The following figures show the cabling schematics for straight-through and crossover.
Figure 2.4: Straight-Through Cable Schematic
Figure 2.5: Crossover Cable Schematic
