IRgaskiT
Application Note 3 - Connecting to a wired network.
Things to do with your IRgaskiT No.3
If your IRgaskiT is not near a computer but there is a wired
network close by you could with a few extra components make your
IRgaskiT into a network device to use with any computer
connected to the network (or indeed anywhere on the internet if
the local network is connected to the internet).
First you will need an IRgaskit with a suitable sensor head you
will also need an RS232 to TCP/IP network adapter (we used the
Alpha Micro Systems Netport) some ribbon cable, a 9 way D type
IDC socket and a 10 way micromatch plug. We used a 10 way ribbon
cable and a free plug (ours were from Farnell Part No. 149032
and 1555549).
In order to make the Serial adapter cable for the Netport you
will need to cut a few cm of ribbon cable remove ~1cm of
conductor #10 from one end. Attach the 9 way ‘D’ socket to the 9
way end of the ribbon cable (wire#1 to pin #1). Attach the 10
way micromatch plug to the ribbon cable (pin#1 to wire #1) a few
cm from the ‘D’ type socket
Figure 1 -
Wiring Diagram for our Cable
Once you have checked your cable the 10 way micromatch is
plugged into CN3 on the IRgaskiT interface board.
Before it can be used the Netport must be set up to use 57600
Bits per second, 8 Data bits, No Parity, 1 Stop bit and Software
Flow Control. This is done by connecting the Netport to the
Network and then using the supplied utility (MS Windows) and a
PC connected to the same network to find the URL of the Netport.
Then using a WEB Browser to edit the settings of the Netport to
match those above.
Once the setup is complete the Nrtport is connected to the 9 way
‘D’ type on the IRgaskiT interface cable. The Netport has a
“through” power connection enabling both the Netport and
IRgaskiT to be neatly supplied from the same power supply by
using one of the Netport power sockets to supply the IRgaskit
(see
Figure 2 below).
Figure 2 below shows our Network interface cable connected to
an IRgaskiT with a 10% CO2 head.
Figure 2 -
Completed
Network Interface Cable connected to an
IRgaskiT.
If your network is wireless at the position you wish to site the
IRgaskit the above configuration may be made into a wireless
link by adding a wireless Ethernet bridge or wireless router
configured as a bridge. We used a SMC indoor/office unit in our
example but you may select the type of unit most suitable to
your location.
Figure
3 -Wireless
Bridge added to Completed Network Interface Cable connected to
an IRgaskiT.
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