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SMA Solar Technology AG
6 Connection
6.1
Cable Requirements
UV resistance of connection cables
Connection cables to be laid outdoors must be UV-resistant or routed in a UV-resistant cable channel.
☐ Number of conductors:
For connecting the ripple control receiver: at least five insulated conductors
For connecting to the multifunction relay: at least two insulated conductors
Tip: You can use one common cable with at least seven insulated conductors to connect both the ripple control
receiver and the multifunction relay
☐ Conductor cross-section: 0.5 mm² to 0.75 mm²
☐ Maximum cable length: 100 m
6.2
Preparing the Connection Cable
Always proceed as follows to prepare each connection cable for connection to multipole terminal blocks.
Procedure:
1. Strip 40 mm of cable sheath from the end of the connection cable to which the multipole terminal block is to be
attached. Make sure that no pieces of cable are dropped into the inverter.
2. Strip off 6 mm of the conductor insulation from each of the required connection cable conductors (see Section 6.1
"Cable Requirements", page 13).
3. Trim unneeded insulated conductors of the connection cable flush with the cable sheath.
4. Push one bootlace ferrule onto each stripped insulated conductor up to the stop, if necessary.
6.3
Inserting the Cables
Additionally required material (not included in the scope of delivery):
☐ Connection cable (see Section 6.1 "Cable Requirements", page 13)
Procedure:
1. Make sure that the inverter has been disconnected and is secured against reconnection (see the inverter manual).
2. Remove the swivel nut from the cable gland for the communication cable.
3. Thread the swivel nut over the cable.
4. Press the two-hole cable support sleeve out of the cable gland.
5. Remove the sealing plug from one of the enclosure openings of the two-hole cable support sleeve and insert the
cable into the enclosure opening.
6. Press the two-hole cable support sleeve with the cable into the cable gland and guide the cable to the
communication assembly in the DC Connection Unit. Ensure that any unused enclosure openings of the two-hole
cable support sleeve are sealed with sealing plugs.
7. Tighten the swivel nut on the cable gland hand-tight. This will secure the cable.
6.4
Connecting the Ripple Control Receiver
6.4.1
Connecting the Ripple Control Receiver
The digital signals for the specifications to the grid management services are transmitted to the INPUT terminal of the
module. Up to 6 control signals can be transmitted.
Installation manual
6 Connection
MD-IO-40-IA-en-11
13
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