K-Patents PR-33-AC - Manual (Page 9)

2 Instrument connections 3
© Copyright K-Patents 2014. All rights reserved.
2.3.1 Ethernet specification
The Sanitary OEM Refractometer is designed to be connected to a network with a stan-
dard Ethernet cable. The cable supplied with the instrument has an industrial M12
connector in the instrument and a RJ-45 connector in the other end. The maximum
communication speed of the refractometer is 100 Mbit/s (Ethernet 100BASE-T).
In the simplest form the network consists of one refractometer and one computer. This
configuration is shown in figure 2.1.
Ethernet
cable
Figure 2.1 Simple network configuration.
Several refractometers can be connected to the same Ethernet network. Also, the San-
itary OEM Refractometer has an automatic function (known as Auto MDI/MDIX) to de-
tect the polarity of the network so that the network may utilize either cross-over or
straight interconnecting cables.
Figure 2.2 shows an example of how to connect three refractometers to an existing LAN
with a switch.
Hub/Switch
LAN
Ethernet
cable
Ethernet
cable
Figure 2.2 Three refractometers in the same network.