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IQ System Controller 3M quick install guide
Wiring control (CTRL) cable
to headers
Section C - Wiring
1
0.3"
CTRL (L)
CTRL (H)
24 V
Ground
Screw terminal
for control cable
(Torque 0.2 N m)
Drain wire
2.75"
4.75" for RHS drain wire or
2.2" for LHS drain wire
NOTE: IQ System Controller supports control wiring and will not
support wireless communication.
Enphase SKU for control cable: CTRL-SC3-NA-01
Control cable to be stripped to recommended dimensions and
connected to the header.
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.
Clamp for
control cable
routing
Dead front
connection
point, keep
clear of cables
IQ Meter Collar
requires 24 V
(top connector
only)
IQ Battery or
IQ Combiner
do not require
24 V (bottom
connector only)
Drain terminal
3
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.
Use a cable
tie to fasten
the control
cables
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.
Always wire
IQ Meter Collar to top
connector of
IQ System Controller 3M
only
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