Contemporary Control Systems AI-SRVR Servers to Ethernet Installation Guide - Manual (Page 7)

TD000200-0IH
7
INDICATOR LIGHTS
STATUS: During boot, this LED flashes green. Once all files have
loaded, it glows solid to indicate the unit is operational.
ARCNET: The RX LED glows green when the unit receives data from
the ARCNET LAN. The ACT LED flashes yellow when unit transmits
data to the ARCNET LAN.
Ethernet: The LINK/ACT LED glows if a valid link exists to an operating
Ethernet device and indicates speed by colour: green for 100 Mbps and
yellow for 10 Mbps. It flashes to indicate activity. The DUP LED glows
green to indicate full-duplex operation and yellow for half-duplex.
FIELD CONNECTIONS
The AI-SRVR Series is available in several transceiver options for
connecting to an ARCNET LAN. Each transceiver is matched to a
particular cable type and identified by a three-character suffix appended
to the model number. The capabilities of each transceiver differs.
CXB — Coaxial Bus
The CXB transceiver presents a high-impedance connection in both the
powered and unpowered states. Although nominally a bus device, it can
be used in either bus or star ARCNET topologies that use RG-62/u
coaxial cable.
Regardless of the topology implemented, the AI-SRVR coaxial port will
require a BNC Tee connector with at least one leg of the connector
fastened to coaxial cable. If the AI-SRVR passes traffic from one portion
of an ARCNET bus to another, the remaining leg of the Tee connector
will tie to another coaxial cable. But if the AI-SRVR occupies the end of
a bus segment, the remaining leg of the Tee connector must be fitted with
a BNC-style terminator having 93 (nominal) ohms of resistance.
The maximum ARCNET segment length is 1000 feet and the maximum
number of nodes per segment is eight. To extend a bus segment beyond
1000 feet, an active hub is required. If the hub port is of the CXS type
(internally terminated), the coaxial cable should attach directly to the hub
port without using a BNC Tee connector. Do not add termination to such
a hub port since the port internally terminates the end of a bus segment.