5 Replacing the overvoltage protection unit for Ethernet
communication
Danger to life from electric shock due to live voltage
High voltages are present in the live components of the DC subdistribution. Touching live
components results in death or serious injury due to electric shock.
• Disconnect the inverter on the DC side (see inverter manual). Always observe the five safety
rules.
• Disconnect the DC sub-distribution (see the DC sub-distribution manual). Always observe the
five safety rules.
• Disconnect all DC sub-distributions that are connected in parallel in the DC connection area
(see the manual of the respective DC sub-distribution). Always observe the five safety rules.
Additionally required material (not included in the scope of delivery):
☐ One or two overvoltage protection units, depending on the number of units to be replaced (for
SMA order number see SMA String-Monitor manual)
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 in the SMA String-Monitor.
4. Unplug the RJ45 plugs from the terminals
EQUIP
and
LINE IN
on the surge arrester.
5. Remove the end clamp from the top-hat rail.
6. Using the top-hat rail support, remove the surge arrester from the top-hat rail.
7. To replace the Ethernet cables:
• Remove the Ethernet cable from the
X7
resp.
X9
terminal on the electronic assembly.
• 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 cables 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.
5 Replacing the overvoltage protection unit for Ethernet communication
SMA Solar Technology AG
Installation Manual
29
SSMAbleitKomm-IA-xx-11
ENGLISH
Summary of Contents for SSM-U-COMOVP
Page 110: ...2 2 DC DC DC DC DC 5 3 22 3 SMA Solar Technology AG SSMAbleitKomm IA xx 11 110...
Page 112: ...F DC G 230 VAC H 4 SMA Solar Technology AG SSMAbleitKomm IA xx 11 112...
Page 125: ...3 25 A 1 2 B 1 RJ 45 C 1 RJ45 D 1 E 1 F 1 3 SMA Solar Technology AG 125 SSMAbleitKomm IA xx 11...
Page 135: ......
