Weidmüller AC SMART ECO User manual

AC SMART
ECO / VALUE / ADVANCED
Operating instructions

2Operating instructions – AC SMART

3
Operating instructions – AC SMART
Manufacturer
Weidmüller Interface GmbH & Co. KG
Klingenbergstraße 26
32758 Detmold, Germany
T [phone]
F [phone]
www.weidmüller.com
Document no. 2984390000
Revision: 03/07.2023
Contents
1 About these instructions 5
1.1 Applicable documents: 5
1.2 Illustrations and symbols 5
2 For your safety 6
2.1 Intended use 6
2.2 Personnel 6
2.3 Safety notes 6
2.4 Productmodications 7
3 Product description 8
3.1 AC SMART product family 8
3.2 Type plate 9
3.3 Product components 10
3.4 Connections and electronic components 11
3.5 Status LED and acoustic signals 13
4 Product functions 14
4.1 Network capability 14
4.2 Communication capability 14
4.3 Operating software web server and
AC SMART app 15
4.4 Charging the vehicle 16
4.5 Status information and error display 16
4.6 Download and delete charging data 16
4.7 Monitor charging process 17
4.8 Maximum charging current 17
4.9 Maximum asymmetrical phase current 17
4.10 LED inactivity 17
4.11 Digital inputs 18
4.12 Load/charge management 18
4.13 PV optimised charging 20
4.14 User authentication 22
5 Unpacking and checking
the scope of delivery 23
5.1 Unpacking the delivery 23
5.2 Checking the scope of delivery 23
6 Storing the EV charging box 25
7 Preparing for installation 26
7.1 Selecting the installation site 26
7.2 Ordering installation 26
7.3 Tools required 26
7.4 Check list before installation 27
8 Planning the installation 28
8.1 Installation Guidance 28
8.2 Network systems 29
8.3 Check list for initial commissioning 30
9 Networking and conguring
the EV charging box 31
9.1 Connecting the EV charging box
with the local network 31
9.2 Assigning the network settings
and IP address 32
9.3 ConguringtheEVchargingbox
in the web server 33
9.4 Connecting the EV charging box to an
external device (Modbus) 43
9.5 Connecting the EV charging box to an
external device (digital input) 44
9.6 Starting Bluetooth coupling mode 45
9.7 Coupling the EV charging box with the
AC SMART app 45
9.8 ConguringtheEVchargingboxvia
AC SMART app 46

4Operating instructions – AC SMART
10 Operating the EV charging box 47
10.1 Charging the vehicle 47
10.2 Completing authentication 48
10.3 Separating vehicle from the
EV charging box after charging 48
10.4 Stopping the charging process 49
11 Cleaning the EV charging box 50
12 Troubleshooting 51
12.1 Status LED 51
12.2 Handling load/charge management 52
12.3 Error codes 52
13 Dismounting the EV charging box 58
14 Disposing of the EV charging box
and packaging 59
15 Technical data 60
16 CE conformity and standards 63

5
Operating instructions – AC SMART
1 About these instructions
These instructions are intended for the operator of the product and for all
persons handling the product during its life cycle.
►Read the operating instructions completely before you start using the
product.
►Keep the operating instructions after reading.
The operating instructions are considered part of the product.
►If you pass on the product to a third party, also pass on the operating
instructions and the applicable documents.
1.1 Applicable documents:
– Assembly and installation instructions
All documents can be downloaded from the Weidmüller website
www.weidmueller.com.
1.2 Illustrations and symbols
►Action step
– Numbered lists
Sections of text next to this arrow contain information which is not related
to safety, but which provides important information regarding correct and
e󰀨ectivework.
WARNING!
A notice with the signal word "WARNING!" warns against a danger that can
result in serious injury or death if it is not avoided.
CAUTION!
A note with the signal word "CAUTION!" warns against a danger that can
result in injuries if it is not avoided.
ATTENTION!
A note with the signal word "ATTENTION!" warns against a danger that can
result in damage to property or malfunctions of the product if it is not avoided.
Note for an electrician
Note referring to further documentation
Note for required tool

6Operating instructions – AC SMART
2 For your safety
2.1 Intended use
The EV charging boxes in the AC SMART product family are designed for
charging electric vehicles and hybrid vehicles. The EV charging boxes can
be installed individually on private property, or installed in larger numbers in
parking lots or underground garages belonging to companies and institutions.
Charge the EV charging boxes with Mode 3 in accordance with IEC 61851-1
and with power plugs in accordance with IEC 62196.
An EV charging box may only be operated if it is installed as stationary on a
wall or a stand. Usage of extension cables is not permitted.
The EV charging box is intended for use in accordance with these operating
instructions. Any use that deviates from these operating instructions is
considered improper use.
Observethecountry-specicrequirementssetforthin IEC 61439-7,
IEC 61851-1, IEC 61851-22, IEC 61851-21-2, IEC 62196-1, IEC 62196-2
and IEC 63000. Also observe the applicable national regulations.
2.2 Personnel
All work on the domestic installation and electrical installation of the EV
charging box must be carried out by an electrician.
2.3 Safety notes
►Check with the responsible grid operator regarding applicable regulations
and provisions for EV charging boxes.
►A commissioning protocol for initial commissioning is available in our online
catalogue.
WARNING!
Risk to life due to electric shock
There is a risk of electric shock when working on the electrical installation of
the EV charging box.
►Ensure that the following equipment is present in the domestic installation:
– one residual current circuit breaker for each charging point in accord-
ance with DIN EN 61008-1, DIN EN 61009-1
– one circuit breaker for each charging point in accordance with
DIN EN 60898,
DIN EN 60947-2
►When working on the electrical installation, ensure that power to the EV
chargingboxandsupplylineareswitchedo󰀨.
►Do not operate the EV charging box without a residual current circuit
breaker in the domestic installation, see Chapter 15.
►Do not operate the EV charging box without a circuit breaker, see
Chapter 15.

For your safety
7
Operating instructions – AC SMART
►Carry out a visual inspection and create a commissioning protocol before
initial commissioning.
►Observe the requirements for the installation site, see Chapter 15.
Improper installation may cause water to get into EV charging box. This could
result in an electric shock.
►Only operate the EV charging box if it has been assembled and installed
as described in the assembly and installation instructions.
►The IP protection class is only achieved if the EV charging box is
assembled and installed as described in the assembly and installation
instructions.
►Do not use a pressure washer to clean the EV charging box.
►Only clean the EV charging box with a soft, lightly moistened cloth.
Risk to life due to re
Foreignobjectsordirtintheplugcontactscancauseare.
►Check the plug contacts for foreign objects and contamination.
►Do not insert any objects into the plug contacts.
►Remove light contamination, for instance dust or sand, by blowing it out.
►Heavy contamination must be cleaned by an electrician.
CAUTION!
Risk of injury if the EV charging box is damaged
A damaged or incomplete EV charging box can lead to malfunctions and
hazards.
►Only use the EV charging box and its accessories if all parts are
undamaged.
► IfyounddamageontheEVchargingbox,commissionanelectricianto
disconnect the EV charging box from the power supply.
Risk of injury from falling parts
Falling parts can cause hazards and injure personnel.
►Do not place any objects on the installed EV charging box.
►Hang the charging cable on the cable tray when it is not in use.
2.4 Product modications
TheEVchargingboxmaynotbemodiedin any way.Productmodications
interfere with the safety and proper function of the EV charging box.

8Operating instructions – AC SMART
3 Product description
3.1 AC SMART product family
ECO Socket
CH-W-S-A7.4-S-E
CH-W-S-A11-S-E
CH-W-S-A22-S-E
CH-W-S-A7.4-P-E
CH-W-S-A11-P-E
CH-W-S-A11-P7.5-E
CH-W-S-A11-P10-E
CH-W-S-A22-P-E
CH-W-S-A22-P7.5-E
ECO Plug
CH-W-S-A11-S-V
CH-W-S-A22-S-V
CH-W-S-A11-P-V
CH-W-S-A11-P7.5-V
CH-W-S-A11-P10-V
CH-W-S-A22-P-V
CH-W-S-A22-P7.5-V
VALUE Socket VALUE Plug
CH-W-S-A11-S-A
CH-W-S-A22-S-A
CH-W-S-A11-P-A
CH-W-S-A11-P7.5-A
CH-W-S-A11-P10-A
CH-W-S-A22-P-A
CH-W-S-A22-P7.5-A
ADVANCED Socket ADVANCED Plug
Figure 3.1 Product variants
Equipment feature or function Product line
ECO VALUE ADVANCED
Max. charging power 7.4 kW (max. 1-phase, 32 A) – –
Max. charging power 11 kW (max. 3-phase, 16 A) 
Max. charging power 22 kW (max. 3-phase, 32 A) 
PLUG: connected charging cable incl. type 2 plug 
SOCKET: charging socket with integrated shutter type 2 
Fault current detection (DC) 
Max. charging current adjustable 
Digital inputs congurable 
Serial communication (RS485/Modbus-RTU) 
Ethernet communication (Modbus-TCP) 
WLAN-Interface 
Bluetooth interface 
Can be operated with the AC SMART app 
Data communication in accordance with OCPP 1.6 (J) – 
Access control via RFID –  
Load/charge management integrated (static) –  
Load/charge management integrated (dynamic) – – 
MID compliant energy meter – – 
Wireless modem incl. SIMcard(LTE)withatrate – – 
Powerline Communication with the vehicle – – 

Product description
9
Operating instructions – AC SMART
3.2 Type plate
Type: CH-W-S-A11-S-E
P/N: 2863070000
S/N: ABXX12AB1234567
M/D: DD.MM.YYYY
S/N:
Instruction
Weidmüller Interface GmbH & Co. KG
Klingenbergstraße 26, D-32758 Detmold
Rated Voltage: 400 V
Rated current: 16 A
Type of current: AC
Electrical output: 11 kW
Phases: 3
Frequency: 50-60 Hz
Ambient temperature: - 30° C ... + 50° C
Protection class: IP54
Instruction: www.weidmueller.com
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Figure 3.2 Type plate
1 Manufacturer
2 Type designation (product variant)
3 Item number
4 Serial number
5 Date of manufacture
6 Rated voltage
7 Rated current
8 Type of current
9 Power rating
10 Connectible phases
11 Nominal frequency
12 Ambient temperature range (operation)
13 IP protection class (dust and water)
14 CE conformity
15 Earthing symbol
16 Disposal information
17 Link to online documentation (QR code)
18 Serial number (QR code)

Product description
10 Operating instructions – AC SMART
3.3 Product components
1
2
3
4
67
5
8
9
Figure 3.3 Product components
Pos. Last name Description
1Enclosure base part
2Enclosure lid The enclosure cover is fastened to the right side of the EV charging box with hinges.
3Interactioneld StatusLEDandRFIDeld(onlyVALUEandADVANCED)
4Type plate
5Design frame Coveroverthelidscrewttings(onlyVALUEandADVANCED)
6Charging socket SOCKET variant: Charging socket type 2 with integrated shutter function
7Plug holder PLUGvariant:Holdingxtureforunusedchargingplug
8Vision panel To display the energy meter (ADVANCED only)
9Charging cable PLUG variant: charging cable with type 2 plug and open cable ends for installation in the
EV charging box

Product description
11
Operating instructions – AC SMART
3.4 Connections and electronic components
ATTENTION!
Damage or fault due to product modications
Removing or modifying the electronic components may cause damage to or
faults in the EV charging box.
►Do not modify the electronic components contained in the product.
►Observe the Assembly and installation instructions.
1
2
Figure 3.4
1 Power board in the housing base part
2Control board in the housing cover

Product description
12 Operating instructions – AC SMART
Power board in the housing base part
IN OUT
Figure 3.5
Identication Description
IN Connection terminal supply line
OUT Only PLUG variation; charging cable connection terminal
Control board in the housing cover
X1
X9
X2
X3
X6
X5
X10
Figure 3.6
Identication Description
X1 Only PLUG variation: plug-in connector to connect the CP conductor
X2 RJ45 Ethernet interface (VALUE and ADVANCED only)
X3 RJ45 Ethernet interface
X5 8-pin connection for 4 x digital outputs, 1 x serial interface (RS485
Modbus-RTU) and 2 x ground
X6 8-pin connection for 5 xdigital inputs, 2 x12 V supply and 1 x ground
X9 Attachment for Powerline module (ADVANCED only)
X10 Attachment for wireless modem (ADVANCED only)

Product description
13
Operating instructions – AC SMART
3.5 Status LED and acoustic signals
Thecolourandashpatternof the LED indicate the operational status of the
EV charging box.
LED state Meaning
Green
illuminated The EV charging box is switched on and ready for operation.
Blue
ashing
The EV charging box is in Bluetooth coupling mode with the
AC SMART app.
Blue
illuminated
The EV charging box has detected a connection to a vehicle
and is ready for a charging process.
Blue
pulsing The charging process is running.
White
pulsing
The EV charging box expects authentication, for instance with
an RFID tag.
White
illuminated The LED indicates the position of the RFID interface.
Red
illuminated
The EV charging box has detected a fault. The charging
process was ended. For troubleshooting information, see
Chapter 12.
Red
ashing
The EV charging box has detected a fault. The charging
process was ended. For troubleshooting information, see
Chapter 12.
Acoustic signal Meaning
Rising sequence of
tones The RFID tag was detected. The authentication was successful.
Falling sequence of
tones
The authentication was not successful. The RFID tag is not
registered or not released.
For notes on troubleshooting, see Chapter 12.

14 Operating instructions – AC SMART
4 Product functions
This chapter describes the product functions of the EV charging box. The
productfunctionsdescribedhereareavailableonlywiththecurrentrmware
version and vary by product line, see Chapter 3.1.Thermwareandrelease
notes are provided in our online catalogue. The instructions on operation and
congurationareprovidedinChapter 9.
4.1 Network capability
Each EV charging box can be integrated into a network via LAN or WLAN.
The EV charging boxes in the VALUE and ADVANCED product line each
have two Ethernet ports and an integrated switch function, so that they can
be used to form a line structure, see Chapter 9.1.
4.2 Communication capability
Each EV charging box supports the following communication protocols:
– Serial communication (RS485/Modbus-RTU)
– Ethernet communication (Modbus-TCP)
– Bluetooth (Low Energy)
Powerline Communication
EV charging boxes in the ADVANCED product line allow for Powerline
communication with the connected vehicle, if the connected vehicle supports
this function as well. The charging process is released simultaneously with
theuniquesystemidentication.
OCPP 1.6 (J)
The EV charging boxes in the VALUE and ADVANCED product lines can
communicate via the Open Charge Point Protocol OCPP 1.6 (J) with a
backend.
The EV charging box can transmit the following messages to the backend:
– Bootnotication(rstmessageafterestablishingtheconnection)
– Authorise (query whether a tag or RFID tag is able to authorise a charging
process)
– Heartbeat(noticationthatthechargingcontrollerisstillreachable)
– MeterValues (values for the energy metre)
– StartTransaction (start of a charging process)
– StopTransaction (end of a charging process)
– Statusnotication(currentstatusofthechargingcontroller)
The EV charging box can receive the following messages:
– ReserveNow
– CancelReservation
– ChangeAvailability
– RemoteStartTransaction
– RemoteStopTransaction
– Reset

Product functions
15
Operating instructions – AC SMART
– UnlockConnector
– GetConguration
– UpdateFirmware
Thefollowingcongurationkeysaresupported:
– ConnectionTimeOut
– HeartbeatInterval
– MeterValueSampleInterval
– NumberOfConnectors
– TransactionMessageAttempts
– TransactionMessageRetryInterval
– ConnectorMaximumCurrent
Mobile phone
The EV charging boxes in the ADVANCED product line contain a wireless
modem with a SIM card. The wireless connection is intended only for the
OCPP connection. The SIM card is already activated upon delivery. Once
the EV charging box is supplied with current, the wireless modem connects
automatically with the wireless network.Theincludedatratecovers1GB
and is valid for a run-time of 10 years.
4.3 Operating software web server and
AC SMART app
Therearetwosoftwareproductsavailabletooperateandcongure
AC SMART EV charging boxes: the integrated web server and the
AC SMART app. The AC SMART app is available free of charge in the App
Store (iOS) and the Google Play Store (Android).
ThescopeoffunctionsofthewebserverandACSMARTappdi󰀨er,as
shown in the following overview. The web server is always required to
conguretheEVchargingboxduringinitialcommissioning.
Function or setting option Web server AC SMART app
Monitoring the status of the EV charging box  
Downloading charging data  
Deleting charging data –
Release or end the charging process  
Adjust the maximum charging current  
Adjust LED inactivity  
Adjust LED brightness  
Register, manage, and delete RFID tags  
Integrate EV charging box in a network (LAN/
WLAN)  
Manage network settings  
Congureauthenticationmethod  
Adjust maximum charging current limit during initial
commissioning –
Monitor charging process  

Product functions
16 Operating instructions – AC SMART
Function or setting option Web server AC SMART app
Communication with the EV charging box via
network connection (LAN, WiFi) and via Bluetooth –
Network settings Modbus RTU, Modbus TCP,
Bluetooth communication) –
Congurationofdigitalinputs –
Congurationofdigitaloutput –
CongurationofanOCPPbackendconnection –
Congurationofload/chargemanagement –
Firmware update  
Set system time  
Resetting the EV charging box to factory settings –
Restarting the EV charging box –
4.4 Charging the vehicle
DependingonthecongurationoftheEVchargingbox,chargingispossible
without authentication (Freemode) or with authentication. If charging is
possible only after authentication, then the ways in which a charging process
can be started, interrupted, or ended depend on the authentication method,
see Chapter 9.3.
4.5 Status information and error display
The status of the EV charging box and any errors are displayed in the web
server and in the AC SMART app. The EV charging box is also equipped with
a status LED.
4.6 Download and delete charging data
ThechargingdatacanbedownloadedasacsvlefortheVALUEand
ADVANCED product lines. In addition, the charging data can also be deleted
in the web server. The charging data for a charging process is saved with the
following information:
– Consecutive number (ID)
– Authorisation tag (Authorisation tag ID)
– Start of the charging process with date and time, time format GMT (Start
time)
– End of the charging process with date and time, time format GMT (Stop
time)
– Consumption in Wh (Energy)
At least 4000 charging processes can be saved. Once the storage capacity is
reached, the entries will be overwritten, starting with the oldest entries.
Ensure that the date and time are set correctly in the web server of the EV
charging box, see Chapter 9.

Product functions
17
Operating instructions – AC SMART
4.7 Monitor charging process
The technical characteristics of the charging process, such as duration and
quantity of energy can be displayed in the web server and in the AC SMART
App. In addition, theelectricalvaluesfortheindividualphases,e󰀨ective
power, reactive power, apparent power, power factor, mains frequency,
overall power and device temperature can be displayed.
4.8 Maximum charging current
During initial commissioning, the electrician denes the maximum limit for the
charging current that can be provided for the connected EV charging boxes in
the web server. This maximum limit is dependent on the domestic installation
andthelocallyapplicablespecicationsandprovisions,andmaybeadjusted
only by the electrician.
The maximum available charging current can be reduced if necessary.
This adjustment can be completed at any time in the web server or the
AC SMART app.
The maximum charging current is dependent on the power rating of the EV
charging box, see the type plate. The value can be adjusted in one ampere
increments.
Power rating Charging current
7.4 kW 6 – 32 amperes
11 kW 6 – 16 amperes
22 kW 6 – 32 amperes
4.9 Maximum asymmetrical phase current
The maximum asymmetrical phase current can be adjusted in the web server
for the VALUE and ADVANCED product lines. This value describes the
maximum current with which a vehicle may charge that does not use all three
phases of the network. The maximum asymmetrical current is dependent
on the domestic installation and the locally applicable specicationsand
provisions.
The ECO product line cannot monitor phase symmetry. Therefore, the
maximum charging current is limited to the set maximum asymmetrical
phase current. If it can be ensured that the asymmetry of phases does not
exceedthelocalspecications,thenthevalueintheEVchargingboxcanbe
increased.
4.10 LED inactivity
The LED inactivityfunctioncanbeusedtoswitcho󰀨thestatus LED if the
statusoftheEVchargingboxdoesnotchangeduringadenedtimeperiod,
for instance during the charging process. Once the status of the EV charging
box changes, the status LED is active once again and the timer is reset. The
function is deactivated upon delivery.

Product functions
18 Operating instructions – AC SMART
4.11 Digital inputs
A charging process can be authorised via an external device. The external
device can be connected to the digital inputs of the EV charging box.
Each EV charging box contains digital inputs (12 V DC) on the control
board on connection terminal X6, the function of which can be individually
conguredinthewebserver.Onedigitalinputcanbeconguredforthe
ECOproductline.FivedigitalinputscanbeconguredfortheVALUEand
ADVANCED product lines. Thefollowingcongurationsarepossible:
Charging authorisation
A charging process is authorised via a switching signal (high signal) on the
digital input (external charging release, e.g. using a key switch). Authorisation
is active only with a logical 1 at the input. If there is a logical 0 at the input,
there is no authorisation. An active charging process is ended and no new
charging process is started.
Current limitation
A reduction of the charging current can be set for each input.
If the digital input is active, the maximum charging current according to
the setting is made available. When the setting is at 100%, the maximum
charging current is used; when the setting is at 0%, there is no charging at all,
and any active charging process will pause. If multiple current limitations are
active,thelimitationwiththelowestchargingcurrentise󰀨ective.
Input monitoring
Monitoring of the digital inputs can be activated if necessary. Exactly one
digital input with the current limitation function must display a logical one for
this purpose; otherwise, the EV charging box will display a fault.
4.12 Load/charge management
Load/charge management regulates the simultaneous charging of vehicles
at multiple charging points. The charging points must be networked together
forthisfunctiontobeused.OneEVchargingboxisconguredasthecontrol
box in each charging network, and all other boxes as satellite boxes. The
maximum charging current available for the entire charging network is distrib-
utedoverthereleasedchargingpointsaccordingtothespeciedparameters.
Load peaks, blackouts, and imbalances are avoided.
To start a charging process, each EV charging box requires at least 6 A
charging current. If charging processes are already active in the charging
network, and less than 6 A charging current is available for another vehicle
to be charged, then this last connected vehicle is placed on a waiting list.
Once the minimum charging current is available once again, the charging
process for the last connected vehicle is started automatically. The charging
processes are started in the sequence in which the vehicles were connected
to the charging network.
Depending on the product line and technical requirements, static, dynamic, or
external load/charge management can be implemented.

Product functions
19
Operating instructions – AC SMART
Static load/charge management
Static load/charge management can be implemented only with an EV charg-
ing box from the VALUE or ADVANCED product lines as the control box.
EV charging boxes from the VALUE and ADVANCED product lines can be
connected as satellite boxes.
With static load/charge management, the total current for up to 16 networked
chargingpointscanbedened(Globalcurrentlimit),includinguptoone
control box and up to 15 satellite boxes. The maximum total current is deter-
mined based on the available connected power of the domestic installation or
sub-distribution, minus the maximum power required by all other devices in
the same distribution circuit.
Thedenedtotalcurrentissetinthecontrolboxanddistributedthereevenly
to all active charging points in the charging network. Whenever a vehicle in
the network is registered or deregistered for charging, the distribution of the
total current is adjusted accordingly.
The EV charging boxes in the VALUE and ADVANCED product lines can be
conguredinthewebserverascontrolboxesorsatelliteboxes.
Dynamic load/charge management
Dynamic load/charge management can be implemented only with an EV
charging box from the ADVANCED product line as control box. EV charging
boxes from the VALUE and ADVANCED product lines can be connected as
satellite boxes.
Dynamic load/charge management can be implemented in a variety of ways:
– via Modbus RTU with an additional bidirectional meter
– via Modbus TCP with an inverter or an energy management system.
Dynamic load/charge management with Modbus RTU
There must be an additional bidirectional meter in the domestic installation
that is connected to the Modbus RTU interface of the EV charging box. The
following bidirectional metres are suitable:
– Weidmüller EM120-RTU-2P (7760051004)
– Weidmüller EM122-RTU-2P (7760051003)
– Weidmüller EM110-RTU-2P (7760051002)
– Weidmüller EM111-RTU-2P (7760051001)
– NZR Serie EcoCount S
– NZR Serie EcoCount SL
The total current that the EV charging boxes and other electrical devices in
the building require is continuously monitored. The total current available for
charging is continuously recalculated.
Dynamic load/charge management with Modbus TCP
The inverter or energy management system must be connected with the EV
charging box directly via a Modbus TCP interface.
The interfaces of inverters are not standardised. If the inverter is changed or
replaced, there may be communication errors between the inverter and the
EV charging box.
Prerequisite
Prerequisite
Prerequisite
Prerequisite

Product functions
20 Operating instructions – AC SMART
The inverter or energy management system communicates directly with
the EV charging box and the energy meter in the domestic installation. An
additional energy meter is not required.
The total current is distributed across all active charging points: when the
other electrical devices require less energy, there is more current available for
charging. When the other electrical devices require more power, the charging
current is reduced.
External load/charge management
All EV charging boxes must be connected in a network with an external
controller for external load/charge management.
Theavailabletotalcurrentisdeterminedanddenedinthisexternalcon-
troller, in the cloud, or in the web server. The EV charging boxes report the
actual charged power to the controller. External load/charge management
can be implemented, for instance, with Weidmüller SMARTcharge. Further
information and application notes are available in our online catalogue.
4.13 PV optimised charging
PV optimised charging is possible only with an EV charging box from the
VALUE or ADVANCED product lines.
The PV optimised charging function makes it possible to use current pro-
duced from a personal photovoltaic system to charge an electric vehicle. The
surplus current generated is used for charging processes and not fed into the
public power grid. Threedi󰀨erentmodes can be selected in the web server
and in the AC SMART App for PV optimised charging.
PV optimised charging can be implemented in a variety of ways:
– via Modbus RTU with an additional bidirectional meter
– via Modbus TCP with an inverter or an energy management system.
PV optimised charging with Modbus RTU
There must be an additional bidirectional meter in the domestic installation
that is connected to the Modbus RTU interface of the EV charging box. The
following bidirectional metres are suitable:
– Weidmüller EM120-RTU-2P (7760051004)
– Weidmüller EM122-RTU-2P (7760051003)
– Weidmüller EM110-RTU-2P (7760051002)
– Weidmüller EM111-RTU-2P (7760051001)
– NZR Serie EcoCount S
– NZR Serie EcoCount SL
ThebidirectionalmetermeasuresthepowerofthePVsystem.Ifsu󰀩cient
power is available, the EV charging box can charge with PV current.
Prerequisite
Prerequisite
Prerequisite