User and installation manual
6 Electrical Connection
SMA Solar Technology AG
Installation ManualSBSxx-US-10-IA-xx-1240
The energy meter and the electrical current strength transducers can also be mounted in the
automatic transfer switch in battery-backup systems. Observe all manufacturer specifications and
safety information when installing the energy meter. The energy meter is not a replacement for a
revenue grade meter (RGM). The energy meter data may not be used for billing purposes.
Additionally required material (not included in the scope of delivery):
☐ 1 approved energy meter (WattNode
®
Modbus WNC-3Y-208-MB or WNC-3D-240-MB from
Continental Control Systems, LLC)
☐ One data cable
☐ Two electrical current strength transducers from Continental Control Systems, LLC (mechanical
and electrical characteristics of the selected electrical current strength transducers must be in
accordance with the installation on site)
Cable requirements:
☐ Cross-section: at least 2 x 2 x 0.22 mm² (2 x 2 x 24 AWG)
☐ Shielding: yes
☐ Twisted pair conductors
☐ UV-resistant for outdoor use.
☐ Maximum cable length: 10m (33ft)
Assignment of the terminal block:
Plug Position Assignment
2 Data+ (D+)
3 Not assigned
5 Ground (GND)
7 Data (D-)
Procedure:
1. Strip the RS485 communication cable 50mm (2in).
2. Trim the cable shield to a length of 15mm (0.59in)
and fold it over the cable sheath.
3. Strip the insulation on the insulated conductors each by 6 mm (0.24 in).
4. If necessary, trim unused insulated conductors flush with the cable sheath or fold it over the
cable sheath.
ENGLISH