Campbell Scientific NL200/NL201 Network Link Interface - Manual (Page 43)

Appendix B. Cables, Pinouts, LED Function, and Jumper
B.6 LEDs
TABLE B-6. Power LED
State Description
Off Device powered off
On Device powered on and ready
Blink OS Download in progress – DO NOT DISCONNECT POWER
TABLE B-7. Ethernet LED
State Description
Yellow On Valid Ethernet link
Yellow Off Ethernet link not valid
Yellow Blink Activity on Ethernet port
Green On 100Mbit/s link
Green Off 10Mbit/s link
B.7 Power Jumper (NL201 only)
If you wish to prevent the NL201 from being powered over the CS I/O port,
remove the two screws on the top of the NL201, remove the NL201’s top
cover, remove the jumper indicated below and place it so that it is connected to
only one post. With the jumper connected to only one post, the NL201 can only
be powered from the barrel connector. With the jumper connected to both
posts, the NL201 can be powered from the CS I/O port or from the barrel
connector.
B-3