Connecting The Contactor And Signal Generator - SMA PPM-RC-10 Instrucciones De Funcionamiento

SMA Solar Technology AG
Procedure:
1. Insert the cable into the product (see Section 6.5.1, page 22).
2. Connect the insulated conductors to the terminal block X20 in accordance with the customer-specific system
circuitry (see Section 6.5.2, page 23).
3. Connect the insulated conductors to the terminal block X30 in accordance with the customer-specific system
circuitry (see Section 6.5.2, page 23).
4. Ensure that the insulated conductors are firmly in place.
6.4

Connecting the Contactor and Signal Generator

Damage to signal generators due to voltage at the switching input
The switching inputs are intended for the connection of potential-free signal generators such as switches and ripple
control receivers suitable for 24 V DC. Unsuitable signal generators may be overloaded when a voltage of
24 V DC is applied to the signal input. The signal generators may be damaged due to overload.
• Ensure that the signal generator is suitable for voltages of 24 V DC.
• Ensure that the signal generator is potential-free.
The switching inputs and outputs for contactors and signal generators can be configured via the user interface. Each
access must be assigned either a switching input or a switching output function:
• The switching outputs function as coupling relays with potential-free contacts.
• Switching inputs supply 24 V DC. This means that you can connect potential-free signal generators (e.g. circuit
breaker or ripple control receiver) to the switching inputs without an additional voltage source.
Example of connecting a contact and a signal generator:
Control
24 V
Figure 9 : Example of connecting a contact (on the left) and a signal generator (on the right)
Requirements for connecting a contactor:
• The contactor must be suitable for connection to multifunctional switching outputs (see Section 11, page 32).
• Maximum switching voltage: 30 V DC
• Limiting continuous current: 4 A DC
• Maximum switching current: 4 A DC
• Minimum load recommended: 10 V DC / 10 mA; 24 V DC / 1 mA
Requirements for connecting a signal generator:
☐ The external feedback contact must be able to switch a switching current less than 10 mA at 24 V.
Operating manual
NOTICE
Contactor
6 Electrical Connection
Control
24 V
PPM-RC-10-BE-xx-10 21