6 Electrical Connection
SMA Solar Technology America LLC
Installation Manual STP50-US-40-IA-en_es-11 39
Additionally required material for the use of conduits (not included in the scope of
delivery):
☐ Conduit (trade size: 27mm (1in) or smaller with suitable reducer bush)
☐ Rain-tight or conduit fittings for wet locations complying with UL514B (trade size: 27mm
(1in) or smaller with suitable reducing bush)
Cable requirements:
The cable length and quality affect the quality of the signal. Observe the following cable
requirements.
☐ Cable type: 100BaseTx
☐ Cable category: Cat5, Cat5e, Cat6, Cat6a or Cat7
☐ Plug type: RJ45 of Cat5, Cat5e, Cat6 or Cat6a
☐ Shielding: SF/UTP, S/UTP, SF/FTP or S/FTP
☐ Number of insulated conductor pairs and insulated conductor cross-section: at least 2 x 2 x
0.22 mm² (2 x 2 x 24 AWG)
☐ Maximum cable length between two nodes when using patch cables: 50m (164ft)
☐ Maximum cable length between two nodes when using installation cables: 100m (328ft)
☐ UV-resistant for outdoor use
Procedure:
1.
DANGER
Danger to life due to electric shock
• Disconnect the inverter from all voltage sources (see Section8, page50).
2. If the enclosure lid of the DC connection unit is
closed, remove it as follows: Unscrew all ten screws
with a Torx screwdriver (TX25) and remove the
enclosure lid carefully forward.
3. Set the screws and the enclosure lid aside and store safely.
4. When using conduits, perform the following steps:
• Remove the M32 cable glands from the enclosure opening. To do so, unscrew the
counter nut from the inside and remove the cable gland from the enclosure opening.
• Insert the conduit fitting into the opening and tighten from the inside using the counter nut.
• Attach the conduit to the conduit fitting.
• Lead one end of the network cable from the conduit into the inverter.
5. When using the cable glands, perform the following steps:
• Remove the swivel nut from the cable gland for the communication cable.
• Thread the swivel nut over the network cable.
ENGLISH
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