Installation; Installing The Ethernet Cables; Installing The String Cables - SMA STRING-MONITOR SSM-U-2410 Technical Information

5 Installation

5 Installation
5.1

Installing the Ethernet Cables

Up to ten SMA String-Monitors can be connected to each string monitoring communication connection of the inverter
in line topology (number of connections for string monitoring communication see the inverter manual).
The Ethernet cables are connected to the LSA+ terminals of the electronics assembly using LSA+ punch down tools.
Interference in data transmission due to unshielded power cables
If unshielded power cables are used, they generate an electromagnetic field during operation which may induce
interference in network cables during data transmission.
• When laying network cables, observe the following minimum clearances to unshielded energy cables:
– For installation without separating strip: at least 200 mm
– For installation with aluminum separating strip: at least 100 mm
– For installation with steel separating strip: at least 50 mm
Requirements for Ethernet cables:
☐ Cable type: copper, two-conductor
☐ Number of insulated conductor pairs and insulated conductor cross-section: 4 x 2 x 0.125 mm
☐ Cable type: at least Cat5 with shielding S-UTP, F-UTP or higher
☐ Maximum cable length: 100 m
☐ The Ethernet cable must be connected in accordance with EIA/TIA 568B (8-conductor):
Signal
TX+
TX-
RX+
Not assigned
Not assigned
RX-
Not assigned
Not assigned
5.2

Installing the String Cables

The string cables of the PV arrays are connected to the string cables of the SMA String-Monitor via DC connectors. The
string cables of the PV arrays must be equipped with DC connectors for this. The DC connectors are available as an
accessory (see Section 8, page 24). The DC connectors are pre-installed on the string cables of the SMA String-
Monitor.
Damage to the SMA String-Monitor due to moisture penetration
In order to protect the enclosure of the SMA String Monitor from moisture, all unused DC inputs must be closed
with suitable protective caps on the DC connectors. The protective caps are available from Phoenix Contact.
12 SSMUXX1015-TI-en-10
EIA/TIA 568B (8-conductor)
Insulated conductor color
White/orange
Orange/white or orange
White/green
Blue/white or blue
White/blue
Green/white or green
White/brown
Brown/white or brown
SMA Solar Technology AG
2
to 0.205 mm
Technical Information
2