enphase IQ System Controller 3M Quick Install Manual page 29

Section C - Wiring
Wiring control (CTRL) cable
to headers
NOTE: IQ System Controller supports control wiring and will not
support wireless communication.
Enphase SKU for control cable: CTRL-SC3-NA-01
CTRL (L)
1
CTRL (H)
Ground
Drain wire
24 V
0.3"
2.75"
4.75" for RHS drain wire or
2.2" for LHS drain wire
Control cable to be stripped to recommended dimensions and
connected to the header.
3
Drain terminal
IQ System Controller is not the terminal node for the
wired control network. Use a control cable of length of
40 inches plus a conduit length on each side.
Connect the drain wire to the drain terminal only at one
end of a CTRL cable. Do not connect drain wires at both
ends of a CTRL cable.
IQ System Controller 3M quick install guide
Screw terminal
for control cable
(Torque 0.2 N m)
Always wire
IQ Meter Collar to top
connector of
IQ System Controller 3M
only
Use a cable
tie to fasten
the control
cables
2
Control cable routing inside IQ System Controller.
Do not use side conduits for control cable routing.
NOTE:
1) 24 V is available in the upper connector only.
2) 24 V must be connected for the IQ Meter Collar to
operate correctly.
NOTE: The control cable required for IQ Battery 5P,
IQ Combiner 5/5C, and IQ System Controller 3M must be
compliant with UL 3003, UL 1277, and UL 83 standards.
The Enphase control cable (SKU: CTRL-SC3-NA-01) with
optimal impedance to ensure control communication has
been validated for optimal system performance. Third-party
cables may not have the correct characteristic impedance
and consequently may not work for reliable control
communication.
IQ Meter Collar
requires 24 V
(top connector
only)
IQ Battery or
IQ Combiner
do not require
24 V (bottom
connector only)
Clamp for
control cable
routing
Dead front
connection
point, keep
clear of cables
29