SMA SI 3.0-11 Installation - Manual (Page 49)

SMA Solar Technology AG 7 Electrical Connection
Installation Manual SI30M-44M-60H-80H-IA-en-30 49
7.4.18 Connecting the Signal Cable of the External Generator Request
An external control signal can transmit a generator request to the generator management. If you have
configured the generator management for the external generator request, the generator management starts
the generator if there is a high level present. The generator management stops the generator if there is a low level. As a
result, all generator run-times are complied with.
Figure 18: Connection of the control cable of an external generator request (example).
Requirements:
☐ The technical requirements of the digital input must be complied with (see Section 10 "Technical Data", page 94).
Cable requirements:
☐ Copper wire
☐ Conductor cross-section: 0.2 mm² to 2.5 mm²
Procedure:
1. On the Sunny Island, connect one insulated conductor of the control cable to terminal BatVtgOut+
(see Section 7.5.6 "Connecting BatVtgOut, DigIn, BatTMP, and BatCur", page 56).
2. Connect one insulated conductor of the control cable to terminal DigIn +.
3. Connect terminal BatVtgOut– to terminal DigIn –. Use the same conductor as in the control cable.