Overview 7
C: Neutral.
On wye models, this terminal must be connected to neutral. On delta models, it is
good practice to connect this terminal to the safety ground terminal using a short jumper wire.
D, E, F: Mains line inputs.
One or more of these terminals are connected to the mains lines. For
three phase measurement, the
Ø
A
(phase A),
Ø
B
(phase B), and
Ø
C
(phase C) terminals are
used for the three phases. On wye WattNode models, the meter is powered from the
N
and
Ø
A
terminals. On delta models, the meter is powered from the
Ø
A
and
Ø
B
terminals.
G: Line voltage measurement ratings.
This block lists the nominal line-to-neutral “
Ø-
N 120V
~
”
voltage, line-to-line “
Ø-Ø
240V
~
” voltage, and the rated measurement voltage and category
“
240V CAT III
” for this model. See
for more information
about the measurement voltage and category.
H: UL Listing mark.
This shows the UL and cUL (Canadian) listing mark and number “
3KNN
”.
I: FCC Mark.
This logo indicates that the meter complies with part 15 of the FCC rules.
J: Current transformer (CT) voltage rating.
These markings “
0.333V
~
” indicate that the meter
must be used with CTs that generate a full-scale output voltage of 0.33333 Vac (333.33 mil-
livolts AC).
K, L, M: Current transformer (CT) inputs.
These indicate CT screw terminals. Note the white
and black circles at the left edge of the label: these indicate the color of the CT wire that should
be inserted into the corresponding screw terminal. The terminals marked with black circles are
connected together internally.
N: FT10 wiring terminals.
These connect to the
L
on
W
orks
FT-10 network. They are polarity
insensitive.
O:
L
on
W
orks
service LED.
The
L
on
W
orks
service LED indicates network status; see
Service
LED (pg 26)
. Immediately below the LED on the side of the housing is the service button, used
to identify the WattNode meter on the
L
on
W
orks
network.
P: Firmware version.
This indicates the WattNode meter’s firmware version.
Q: Serial number.
This shows the WattNode meter’s serial number.
R: LonMark.
This logo indicates that the meter meets LonMark interoperability guidelines, v3.4.
S: Mains supply rated voltage.
This is the rated supply voltage for this model. The
V
~
indicates
AC voltage. For wye models, this voltage should be applied between the
N
and
Ø
A
terminals.
For delta models, this voltage should be applied between the
Ø
A
and
Ø
B
terminals.
T: Neuron ID.
This is the Neuron
®
ID (prefixed by “NI”), which is a unique 64 bit hexadecimal
number assigned to each LonWorks device.
U: Mains frequencies.
This indicates the rated mains frequencies for the meter.
V: Maximum rated power.
This is the maximum power consumption (watts) for this model.
X: CE Mark.
This symbol indicates that the WattNode meter complies with the regulations of the
European Union for Product Safety and Electro-Magnetic Compatibility.
Y: Caution, risk of electrical shock.
This symbol indicates that there is a risk of electric shock
when installing and operating the meter if the installation instructions are not followed correctly.
Z: Attention - consult Manual.
This symbol indicates that there can be danger when installing
and operating the meter if the installation instructions are not followed correctly.