Campbell Scientific NL240 Wireless Network Link Interface - Manual (Page 49)

Appendix B. Cables, Pinouts, LED Function, and Jumper
TABLE B-6. Wi-Fi LED (Green)
State Description
Blinking once
a second
Attempting to acquire a network address from DHCP.
Flash with
network
activity
Successfully connected to wireless network.
B.6 Power Jumper
If you wish to prevent the NL240 from being powered over the CS I/O port,
remove the two screws on the top of the NL240, remove the NL240’s top
cover, remove the jumper above the red LED and place it so that it is connected
to only one post. With the jumper connected to only one post, the NL240 can
only be powered from the barrel connector. With the jumper connected to both
posts, the NL240 can be powered from the CS I/O port or from the barrel
connector.
B-3