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TCP/IP and RS485 LED indication
Maintenance
RS485 data line resistance check
The Net2 plus performs two functions. It is an access control unit and also a TCP/IP RS485 converter. Information can pass across the
PCB between the TCP/IP and RS485 data port but is not relevant to this ACU.
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Server Connected LED (Steady Green)
This LED shows that the TCP/IP interface is active and receiving data from the Net2 PC server. This includes all data for other ACU’s that
may be linked via the RS485 data port.
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Rx and Tx LED’s
These LED’s show the activity for this ACU only. It is not dependant on the source (TCP/IP or RS485). The Rx LED will flash for all data
being received and the Tx LED will only flash when this unit responds to its own address.
It is advisable to ensure that any third party backup power supplies or recovery procedures are checked regularly to ensure that the
operation of the Paxton system is not compromised.
1 - Short circuiting, mutilation or incineration of the cells must be avoided to prevent one or more of the following occurrences; Release
of toxic materials, release of hydrogen and/or oxygen gas, rise in surface temperature.
2 - If a cell has leaked or vented the control unit must be replaced. The battery is not to be replaced
End of line termination
- 120 ohm resistors must be linked across each data pair at the beginning AND end of the line. This can be done
on many units with a switch or jumpers. If not, resistors are provided with the converter.
Reader & Data Cable Screens
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Data cable screens and spare cores MUST be connected throughout.
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Reader and keypad screens where provided, should be connected to the Black 0V terminal.
The data line must be wired in a single daisy chain. The data connection to the PC may be located at any position along the data line.
Power down all TCP/IP, USB and RS232 converters (individual and Net2 plus).
1. Check the resistance across each data pair is 60-80 ohms.
2. Check that there are no data line to screen shorts.
3. Check the screen of the data cable is continuous - this provides the 0V DC system reference
