SMA String-Monitors Ethernet overvoltage protection set User Manual
Page 29
Procedure:
1. Disconnect the inverter on the DC side (see inverter manual).
2. Disconnect the SMA String-Monitor (see SMA String Monitor manual).
3. Disassemble the protective covers of the SMA String-Monitor (see SMA String-Monitor
manual).
4. Unplug the RJ45 plugs from the terminals EQUIP and LINE IN on the overvoltage protection
unit.
5. Remove the end clamp from the top-hat rail.
6. Using the top-hat rail support, remove the overvoltage protection unit from the top-hat rail.
7. To replace the cables of the overvoltage protection unit:
• On the assembly, unplug the cable of the overvoltage protection unit at terminal X7 or
X9.
• Release the mounting tie of the cable and pull the cable out of the SMA String-Monitor.
• Pull the other cable out of the cable channel. To do this, remove the cover of the cable
channel, take the cable out and replace the cover.
• Remove the RJ45 plug from the cable. Make sure that no pieces of cable are dropped
into the SMA String-Monitor.
• Pull the cable out of the SMA String-Monitor through the membrane.
8. Install the new overvoltage protection unit (see Section 4.3, page 25).
6 Deinstalling the Overvoltage Protection Unit for
Ethernet Communication
The deinstallation procedure for the SMA String-Monitor is described based on a position in the
middle of the communication bus with two overvoltage protection units (communication output and
communication input) for Ethernet communication.
Danger to life from electric shock due to live voltage
High voltages are present in the live components of the DC sub-distribution. Touching live
components results in death or serious injury due to electric shock.
• Disconnect the inverter on the DC side (see the inverter manual).
• Disconnect the DC sub-distribution (see the DC sub-distribution manual).
• Disconnect all DC sub-distributions that are connected in parallel in the DC connection area
(see the manual of the respective DC sub-distribution).
Additionally required material (not included in the scope of delivery):
☐ Two to four plugs to seal the membrane holes:
• For membrane holes with diameter 3.2 mm to 6.5 mm: plugs with diameter 6 mm, available at
.
• For membrane holes with diameter 5.0 mm to 10.2 mm: plugs with diameter 10 mm, available
at .
6 Deinstalling the Overvoltage Protection Unit for Ethernet Communication
SMA Solar Technology AG
Installation Manual
29
SSMAbleitKomm-IA-xx-10
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