4 Product Description
SMA America, LLC
26
SB3-5TLUS22-IA-en-10
Installation Manual
4.6 Communication Interface
The inverter can optionally be fitted with an extra communication interface (e.g., RS485 or Speedwire
with Webconnect function). This communication interface enables the inverter to communicate with
special SMA communication products or other inverters (for information on supported products, see
www.SMA-Solar.com). The interface can be retrofitted, installed at the factory if specified in the order,
or included in the regular scope of delivery.
You can only set the inverter's parameters using SMA communication products.
Depending on the type of communication, RS485 or Speedwire, the parameters and messages are
displayed differently on the communication products.
You can adjust the country data set of the inverter before commissioning or within the first ten
operating hours via the two rotary switches in the inverter. You can only set all other operating
parameters of the inverter via communication products.
4.7 Emergency Power Module
The inverter is equipped with an emergency power module by means of which an external
socket-outlet can be connected to the inverter. The socket-outlet provides current from the PV plant on
demand in the event of a grid failure. The emergency power module also has a connection for the fan
retrofit kit, enabling an external fan to be controlled.
Fan Retrofit Kit
The fan retrofit kit is used for additional inverter cooling at high ambient temperatures (for information
on installation and configuration, see the fan retrofit kit installation manual). The fan retrofit kit can be
retrofitted, installed at the factory if specified in the order, or included in the regular scope of delivery.
4.8 Arc-Fault Circuit Interrupter (AFCI)
In accordance with the National Electrical Code
®
, Article 690.11, the inverter has a system for the
recognition of electric arc detection and interruption. An electric arc with a power of 300 W or
greater must be interrupted by the AFCI within the time specified by UL 1699B. A tripped AFCI can
only be reset manually. You can deactivate automatic electric arc detection and interruption (AFCI)
via a communication product in "Installer" mode if you do not require this function. The 2011 edition
of the National Electrical Code
®
, Section 690.11, stipulates that newly installed PV plants attached
to a building must be fitted with a means of detecting and disconnection of serial electric arcs (AFCI)
on the PV side.
Example: How the country data set parameter is displayed
For communication with RS485:
CntrySet
parameter
For communication with Speedwire:
Set country standard
parameter
