SMA SI 3.0-11 Installation - Manual (Page 35)

SMA Solar Technology AG 7 Electrical Connection
Installation Manual SI30M-44M-60H-80H-IA-en-30 35
Requirements:
☐ The total length of the communication bus must not exceed 30 m. Keep in mind that the communication bus possibly
connects several nodes such as other Sunny Island Chargers.
Procedure:
1. Plug the data cable into a free pin connector ComSync on the
Sunny Island. Ensure that the cable is correctly connected (see
Section 7.5.4 "Connecting the Data Cable", page 54).
2. Ensure that the communication bus is closed at each end, e.g. with a terminator.
7.4.7.5 Connecting the Data Cable of the Sunny Island Charger 50 Charge
Controller
A maximum of four Sunny Island Charger 50 devices can be connected per cluster (see the Quick Reference
Guide "Off-Grid Systems").
Requirements:
☐ The total length of the communication bus must not exceed 30 m. Keep in mind that the communication bus possibly
connects several nodes such as additional Sunny Island inverters.
Cable requirements:
☐ Classification: CAT5e
☐ Type of plug: RJ45
Procedure:
1. Plug the data cable into a free pin connector ComSync on the
Sunny Island. Ensure that the cable is correctly connected
(see Section 7.5.4 "Connecting the Data Cable", page 54).
2. Connect the other end of the data cable to one Sunny Island Charger 50 and further Sunny Island Charger 50
devices to one another (see documentation for the Sunny Island Charger 50 charge controller).
3. Ensure that the communication bus is closed at each end, e.g. with a terminator.