SMA CLUSTER CONTROLLER Installation - Manual (Page 65)

Pin group Pin Signal Explanation
Analog current output 2
Feedback for current reactive power
setpoint A4 I+ Current output
A5 I− Current return
A6 GND Shield ground
Analog current output 3
Feedback for current total active
power of the system as a percentage
of the maximum nominal system
power B1 I+ Current output
B2 I− Current return
B3 GND Shield ground
Interpretation of the Signal Strength as a Percentage Value of the Active Power
Limitation
The strength of the feedback signal corresponds to the percentage value to which the active power
of the inverters in the system is currently limited.
Figure 28: Interpretation of the signal strength as a percentage value of the active power limitation in relation to
the inverter parameter Currently set active power limit or Pmax
6 Connection and Commissioning SMA Solar Technology AG / SMA America, LLC
Installation Manual 65 ClusterController-IA-en-14