enphase IQ Battery 10C Quick Install Manual page 24

Figure 5: First and intermediate control communication boards
• Both control connectors (C1/C2) present on the control communication board are identical and can be used
interchangeably.
• The total length of control wiring across the system cannot exceed 250 feet to ensure the system operates as per
specifications.
• Make sure the drain wires do not come in contact with any live connection.
• Ensure that all five wires (purple-L, orange-H, black-G, red-not used, gray-drain wire) are connected properly to the
control connector.
• For the control connector of the IQ Meter Collar, drain wire connection is not required.
1. After routing the control cable, connect it to the connectors (torque to 1.8 in-lb or 0.2 N m).
2. Plug in the connectors, and termination resistor and connect drain wires depending on the configuration.
a. One IQ Battery 10C with IQ Combiner 6C
NOTE: Use a termination resistor for all the unused control connection points.
b. Two IQ Battery 10C units with IQ Combiner 6C
Control (L)
Control (H)
Drain wire
Control (G)
Not used
0.3"
Figure 6: Last control communication board with resistor installed on one
EN-24
control connector
Legend:
Termination resistor
Control Cable
1 CTRL(L)
2
CTRL(H)
3
Ground
4
24V DC
D
Drain