Thermo Scientific AquaSensors
™
DataStick
™
Ethernet Communications User Guide
9
Refer to the DataStick Manual for detailed information on installation, maintenance and
operation of sensors.
The Ethernet option in the AV38 Local Display provides an RJ45 jack for connection to a
power injector or 802.3af-compliant (PoE) Ethernet hub or switch as shown on the right
side of Figure 4. It allows network access to the Modbus RTU DataStick connected to
the AV38.
In this form, power for the Ethernet option is provided by a Power-Over-Ethernet device,
and power for the AV38 Local Display is provided by an external 24 VDC power supply.
This manual includes only the Ethernet option in the AV38. For information about the
rest of the AV38, please see the AV38 User’s Manual.
3 Hardware Setup
Both forms of the product possess the same default communications settings. They are as
follows:
IP Address:
192.168.0.100
Subnet Mask:
255.255.255.0
Gateway Address:
192.168.0.1
Both forms support a data rate of 10 Mbps (10Base-T).
Both forms comply with the IEEE 802.3af Power Over Ethernet standard and, as such,
are termed powered devices (PD). This means that they receive their power via the
Ethernet network.
Power Classification: Class 1
Supply Voltage:
44–57 VDC, 48 VDC nominal
Supply Current:
25 mA @ 48 VDC
They are insensitive to the polarity of the power supply and are capable of operating in
either Mode A or Mode B as shown in Figure 7 and Figure 8, respectively.
Figure 7: Endpoint power sourcing equipment, Mode A. The product is the Powered End Station.
