SMA STP 50-40 Operating Manual page 23

SMA Solar Technology AG 4 Product Overview
Module slots
The inverter is standard-equipped with two module slots. The module slots are located on the
communication assembly and allow additional modules to be connected (e.g. SMA Sensor
Module). The modules are available as accessories. The installation of two identical modules is not
permissible.
SMA RS485 Module
With the assembly of the RS485 Module, the inverter can communicate with special
SMA communication products (Information on assembly and connection see manual of the SMA
RS485 Module). The SMA RS485 Module can be retrofitted.
Antenna Extension Kit
Within the WLAN network, the Antenna Extension Kit enables the radio range of the inverter to be
upgraded (Information on assembly and connection see manual of the Antenna Extension Kit). The
Antenna Extension Kit can be retrofitted.
SMA Sensor Module
The SMA Sensor Module has different interfaces for connecting various sensors (i.e. temperature
sensor, irradiation sensor, anemometer or energy meter). The SMA Sensor Module converts the
signals of the connected sensors and transmits them to the inverter. Information on installation,
connection and configuration can be found in the manual for the SMA sensor module. The SMA
Sensor Module can be retrofitted.
SMA I/O modules
The SMA I/O module enables the inverter to perform grid management services. Information on
installation, connection and configuration can be found in the manual for the SMA I/O module.
The SMA I/O Module can be retrofitted.
Grid management services
The product is equipped with service functions for grid management.
Depending on the requirements of the grid operator, you can activate and configure the functions
(e.g. active power limitation) via operating parameters.
Grid and PV system protection
The inverter is equipped with redundant and monitored switching elements for grid disconnection
simplifying grid and PV system protection required according to VDE-AR-N 4105, In this case the
disconnection devices integrated in the inverter can replace an external tie switch. An external,
certified monitoring unit with an integrated PV system protection relay (potential-free) and an alarm
contact (implemented as break contact) must be included. In addition, the inverter must be
equipped with firmware version > 3.01.00.R and an SMA I/O Module. The inverter can be
connected to the monitoring unit of the grid and PV system protection device via the SMA I/O
Module and receive the signal for grid disconnection (for further information see technical
information "SUNNY TRIPOWER CORE1 - Simplified Implementation of Grid and PV System
Protection in PV System in accordance with VDE-AR-N 4105:2018-11").
Operating manual STP50-4x-BE-en-23 23