Ethernet interface (X001)
You can program and commission the CX7293 Embedded PC via the Ethernet interface X001. The Ethernet interface achieves speeds of 10/100/1000 Mbit/s.
The LEDs on the left side of the interface indicate the connection status. The upper LED (LINK/ACT) indicates whether the interface is connected to a network. If this is the case, the LED lights up green. The LED flashes when data transmission is in progress on the interface.
The lower LED (SPEED) indicates the connection speed. At a speed of 10 Mbit/s, the LED does not light up. At a speed of 100 Mbit/s, the LED lights up green. At 1000 Mbit/s (Gigabit), the LED lights up red.
PIN | Signal | Description |
|---|---|---|
1 | T2 + | Pair 2 |
2 | T2 - | |
3 | T3 + | Pair 3 |
4 | T1 + | Pair 1 |
5 | T1 - | |
6 | T3 - | Pair 3 |
7 | T4 + | Pair 4 |
8 | T4 - |
Transmission standards
10Base5
The transmission medium for 10Base5 consists of a thick coaxial cable ("yellow cable") with a max. data transfer rate of 10 Mbaud arranged in a line topology with branches (drops) each of which is connected to one network device. Because all the devices are in this case connected to a common transmission medium, it is inevitable that collisions occur often in 10Base5.
10Base2
10Base2 (Cheaper net) is a further development of 10Base5, and has the advantage that the coaxial cable is cheaper and, being more flexible, is easier to lay. It is possible for several devices to be connected to one 10Base2 cable. It is frequent for branches from a 10Base5 backbone to be implemented in 10Base2.
10BaseT
Describes a twisted pair cable for 10 Mbaud. The network here is constructed as a star. It is no longer the case that every device is attached to the same medium. This means that a broken cable no longer results in failure of the entire network. The use of switches as star couplers enables collisions to be reduced. Using full-duplex connections they can even be entirely avoided.
100BaseT
Twisted pair cable for 100 Mbaud. It is necessary to use a higher cable quality and to employ appropriate hubs or switches in order to achieve the higher data rate.
10BaseF
The 10BaseF standard describes several optical fiber versions.
Short description of the 10BaseT and 100BaseT cable types
Twisted-pair copper cable for star topologies, where the distance between two devices may not exceed 100 meters.
UTP
Unshielded twisted-pair
This type of cable belongs to category 3, and is not recommended for use in an industrial environment.
S/UTP
Screened/unshielded twisted-pair (shielded with copper braid)
Has an overall shield of copper braid to reduce influence of external interference. This cable is recommended for use with Bus Couplers.
FTP
Foiled shielded twisted-pair (shielded with aluminum foil)
This cable has an outer shield of laminated aluminum and plastic foil.
S/FTP
Screened/foiled shielded twisted-pair (shielded with copper braid and aluminum foil)
Has a laminated aluminum shield with a copper braid on top. Such cables can provide up to 70 dB reduction in interference power.
STP
Shielded twisted-pair
Describes a cable with overall shielding without further specification of the type of shielding.
S/STP
Screened/shielded twisted-pair (wires are individually shielded)
This identification refers to a cable with a shield for each of the two wires as well as an outer shield.
ITP
Industrial Twisted-Pair
The structure is similar to that of S/STP, but, in contrast to S/STP, it has only two pairs of conductors.