Continuum CPU Reference
23
Ethernet Connections
The controller module is equipped with an on-board Ethernet interface—complete
with connector—corresponding to one of the following Ethernet media types:
10BASE-2
10BASE-T
Different connectors, cable limitations, and network termination requirements apply to
the Ethernet, depending on which type of option your NetController uses.
10BASE-2 Ethernet
Cable Limitations:
This option provides a standard BNC coaxial cable connector for Ethernet. RG-58
coaxial cable is used to form this type of network. The maximum cable length you
can use without a repeater is 606 ft (185 meters) for an Ethernet with 30 nodes.
10BASE-2 Cable Specifications
Cables used to form the 10Base-2 Ethernet should be RG-58 thin coaxial, shielded
wire. The cable should have nominal impedance of 50
Ω
.
Recommended: Thin Coaxial RG-58 a/u or RG-58 c/u Brand Rex RG 58
Installation
Plug the end of coaxial ‘RG-58 T’ connector directly into the coaxial connector on the
back of the NetController. Every T connector on the Ethernet has three ends. The
bottom of the T always connects to the coaxial connector on a NetController or
workstation. Each side of the T connector connects either to a coaxial cable that is
connected to other devices or to a coax terminator if this device is at either end of a
line.
One side of T
Connects to coaxial
One side of T
always connects
to a coaxial cable.
can connect to
either a coaxial
cable or a
terminating resistor
connector on NetController
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