SMA HM-20 User Manual

8 Connection
SMA Solar Technology AG
Operating manualHM-20-BE-en-1926
2. Connect one current transformer to each line conductor L1, L2 and L3.
3. On each current transformer, connect 1 connection cable for secondary current measurement to terminals k/S1
and l/S2.
4. Connect the connection cables for current measurement (dashed gray line) to the screw terminals L1, L2 and L3 of
the SunnyHomeManager. To do this, open each screw terminal using a cross-head screwdriver, insert the
conductor into the contact terminal and tighten the screw using a cross-head screwdriver (torque: 2.0Nm).
5. Connect the connection cables for voltage measurement (solid gray line) to the screw terminals L1, L2 and L3 at
the output of the SunnyHomeManager. To do this, open each screw terminal using a cross-head screwdriver,
insert the conductor into the contact terminal and tighten the screw using a cross-head screwdriver (torque:
2.0Nm).
6. Connect the connection cables for voltage measurement L1, L2 and L3 (solid gray line) to the corresponding line
conductors L1, L2 and L3.
8.3 Establishing communication to SunnyPortal
8.3.1 Preparing for Speedwire Communication
If the SunnyHomeManager is to communicate with other SMA devices via SMA Speedwire (Ethernet), the
SunnyHomeManager and the Speedwire devices must be in the same local network.
Inverters with Webconnect function
If an inverter is already registered in SunnyPortal with the Webconnect function, the inverter cannot be added to
the SunnyHomeManager system in SunnyPortal.
• In order to be able to add the inverter to the SunnyHomeManager system in SunnyPortal, delete the
inverter with Webconnect function from the Webconnect system in SunnyPortal or deactivate data reception
for the inverter in the Webconnect system in SunnyPortal.
Requirements:
☐ DHCP must be active on the router (see router documentation).
☐ All UDP ports >1024 on the router must be open for outgoing connections. If there is a firewall installed on the
router, you might have to adjust the firewall settings.
☐ It must be possible for the outgoing router connections to reach all Internet destinations (target IP, target port). If
there is a firewall installed on the router, you might have to adjust the firewall settings.
☐ On the router with Network Address Translation), no port forwarding must be entered. Potential communication
problems can thus be prevented.
☐ There must be no packet filtering or manipulation for SIP packets installed on the router.
☐ The routers and network switches with router function must forward the Multicast telegrams (telegrams with
destination address 239.0.0.0 to 239.255.255.255) required for the Speedwire connection to all nodes of the
Speedwire network.
☐ All network components used must support the IGMP protocol, minimum version3 (IGMPv3) (see network
component documentation).
Procedure:
• Connect the Speedwire devices to the router (see Speedwire device documentation).
8.3.2 Connecting the SunnyHomeManager to the Router
Additionally required material (not included in the scope of delivery):
☐ 1 network cable
Network cable requirements:
The cable length and quality affect the quality of the signal. Observe the following cable requirements:

SMA HM-20 Specifications

General

Brand	SMA
Model	HM-20
Category	Measuring Instruments
Language	English