SMA SC 500CP XT Installation - Manual (Page 33)

5.6.5 Connecting the Cable for the External Fast Stop
If required, you can connect an external fast stop in accordance with the circuit diagram. The fast stop can be
operated by means of an internal or external supply voltage.
Shortfall of external supply voltage
If there is an external supply voltage between 18.5 V to 24.0 V, the inverter will continue to operate in its current
operating state. If the external supply voltage falls below 18.5 V, the inverter switches from the current operating
state to the operating state "Stop". If the temperature inside the inverter exceeds the temperature limit, a supply
voltage of 20.0 V to 24.0 V must be present to continue operating the inverter in its current operating state.
Temperature limit: +60°C
• Ensure that the external supply voltage is between 20.0 V and 24.0 V.
Cable requirement:
☐ The cable used must be shielded.
Additional cable requirements for internal supply voltage:
☐ Maximum cable length with cable cross-section: 130 m / 2.5 mm²
☐ Maximum cable length with cable cross-section: 80 m / 1.5 mm²
Requirements:
☐ A switch must be used that can interrupt the supply voltage.
Procedure:
1. Disassemble the panels (see Section 7.2.1, page 40).
2. Insert the cables (see Section 7.1, page 40).
3. Connect the cables in accordance with the circuit diagram (see Section 7.4, page 49).
4. Secure the cables on the cable support rail. This will prevent the cables from being pulled out inadvertently.
5. Mount the panels (see Section 7.2.1, page 40).
5.6.6 Connecting the Cable for Remote Shutdown
The remote shutdown enables the inverter to be switched off from a distance, e.g. from a control room. The function of
the remote shutdown is similar to the stop function of the key switch.
Shortfall of external supply voltage
If there is an external supply voltage between 18.5 V to 24.0 V, the inverter will continue to operate in its current
operating state. If the external supply voltage falls below 18.5 V, the inverter switches from the current operating
state to the operating state "Stop". If the temperature inside the inverter exceeds the temperature limit, a supply
voltage of 20.0 V to 24.0 V must be present to continue operating the inverter in its current operating state.
Temperature limit: +60°C
• Ensure that the external supply voltage is between 20.0 V and 24.0 V.
Procedure:
1. Disassemble the panels (see Section 7.2.1, page 40).
2. Insert the cables (see Section 7.1, page 40).
3. Connect the cables in accordance with the circuit diagram (see Section 7.4, page 49).
4. Secure the cables on the cable support rail. This will prevent the cables from being pulled out inadvertently.
5. Mount the panels (see Section 7.2.1, page 40).
5 Installation SMA Solar Technology AG
Operating Manual 33 SCCPXT-IA-E4-en-44