SMA CLUSTER CONTROLLER Installation - Manual (Page 55)

Figure 20: Pin assignment for pin groups on terminal X4
Pin group Pin Pin assignment Explanation
Digital input 1
Signal 1 of 4 for active power
limitation A1 24 V Voltage supply output
A2 IN Input
A3 GND Reference potential
Digital input 2
Signal 2 of 4 for active power
limitation A4 24 V Voltage supply output
A5 IN Input
A6 GND Reference potential
Digital input 3
Signal 3 of 4 for active power
limitation B1 24 V Voltage supply output
B2 IN Input
B3 GND Reference potential
Digital input 4
Signal 4 of 4 for active power
limitation B4 24 V Voltage supply output
B5 IN Input
B6 GND Reference potential
Danger to life due to electric shock caused by incorrect connection of the ripple control
receiver
Incorrect connection of the ripple control receiver can result in grid voltage on the
Cluster Controller enclosure.
• Do not connect the insulated conductors of the connection cable to the line conductors of the
ripple control receiver.
• When connecting, ensure that no bridge is being used in the ripple control receiver.
6 Connection and Commissioning SMA Solar Technology AG / SMA America, LLC
Installation Manual 55 ClusterController-IA-en-14