AT 3020, Руководство пользователя, Страница: 3 / 6

©2021 A+T 2
APPENDIX A
The 3020 is supplied with a 5 metre bare ended cable. This can be shortened
without affecting the unit or warranty. Custom cable lengths are available, as
are IP68 rated in-line connectors. Contact A+T to discuss your requirements.
Fastnet 3020:
The colour codes in the cable are:-
A+T
Colour Function Comment
Black 0v **See note below
Red +ve Power Normally from Fastnet bus
White Fastnet A Connect to B&G Fastnet White
Green Fastnet B Connect to B&G Fastnet Green
Brown
Not used (isolate)
Blue
Violet
Yellow Push button When contacted with 0v will step to next page
Bare Screen
**If the unit is powered from a supply other than the Fastnet power, then the 0V of this power supply
should be connected common to the 0V (black wire) of the Fastnet bus.
The normal requirements for Fastnet bus apply in that two terminator resistors, each of 100
Ω, at either
end of the network. The resistance measured across green and white with no power should be close to
50 Ω.
Ethernet 3020:
The colour codes in the cable are:-
A+T
Colour Cat5e Colour* Function Comment
Black White/Blue & Blue 0v
Red White/Brown & Brown +ve Power 10-40 VDC
White White/Green RX+
Green Green RX-
Brown White/Orange TX+
Blue Orange TX-
Violet Not used (isolate)
Yellow Push button When contacted with 0v
will step to next page
Bare Screen
Note:
The +V and 0v connections use spare wires within cat5e cable. Twist
together the White/Brown and Brown pair, and the White/Blue and Blue pair for
connection to the +V and 0V terminals.