care when selecting the type and length of coaxial cable used with the NL241. The NL241
antenna connector is RP-SMA male. When connecting directly to the NL241, select a coaxial
cable or antenna with a mating RP-SMA female connector.
6.5 Power
One advantage of using the NL241 in your application is its low power consumption capabilities.
With careful planning, you can reduce your station power needs while still meeting critical
communications needs. See
(p. 12) (Typical Power Consumption), and
48) for more details.
6.6 LED
There is a bi-color LED on the NL241 that serves as an indicator as described below.
NOTE:
This manual describes LED behavior for NL241s with operating system 10.05 or newer. It is
recommended that the latest operating system be used. See
6.6.1 Normal operation
After power-up, the LED turns solid green while the NL241 is searching for and trying to join a
Wi-Fi network. The LED turns solid amber when creating a network.
After successfully joining or creating a network, the LED will flash with network activity. Note that
the LED may only flash once every few seconds on the created network or networks that are not
very busy. For more information see
If the device is unsuccessful at joining or creating a network, the LED will periodically double-
flash red. The device will attempt to connect to the network again after approximately one
minute.
If the Wi-Fi has been disabled via the Mode button configuration, or via an
IPNetPower()
instruction from the data logger, the LED will be off. See
(p. 19) for information on
the Mode button configuration.
6.6.2 Operating system upgrade
When a new operating system is sent to the NL241, the LED will flash repeatedly while the NL241
copies the operating system into its internal flash memory. This process takes about 10 seconds.
While the LED is flashing, the NL241 is in a vulnerable state where removal of power could leave
NL241 Wireless Network Link Interface
18
