SMA SUNNY TRIPOWER X 20-US - Connection to Digital Input DI 1-4; Digital Input DI 1-4; Pin Assignment DI 1-4; Circuitry Overview DI 1-4

6 Electrical Connection
SMA Solar Technology AG
Operating manual STPxx-US-50-BE-en-11 45
• Additionally required material for the connection to digital inputs⇒page38
• Signal cable requirements⇒page37
6.7 Connection to digital input DI 1-4
6.7.1 Digital input DI 1-4
An external signal source can be connected to digital input DI 1-4 (e.g. for active power limitation).
In a system with multiple inverters, the external signal source must be connected to digital input DI
1-4 of the System Manager.
6.7.2 Pin assignment DI 1-4
Digital input D1-4 Pin Assignment
1 2
3
4
5
1 Digital input1
2 Digital input2
3 Digital input3
4 Digital input4
5 Voltage supply output
6.7.3 Circuitry overview DI 1-4
12V
DI4
DI 1-4
DI2
DI3
DI1
K1
K2
K3
K4
SUNNY TRIPOWER
Active power limitation
via digital signals
Figure 9: Connection of a signal source for active power limitation via digital signals (example)
6.7.4 Connecting signal source to DI 1-4
Procedure:
1. Connect the connection cable to the digital signal source (see the manual from manufacturer).
2. Disconnect the inverter from all voltage sources (see Section9, page67).
3. Remove the filler plug from the enclosure opening which is located at the bottom of the
inverter.
4. Insert the conduit fitting into the opening and tighten from the inside using the counter nut.