Connecting Signal Source to Digital Input


Digital signals for the active power supply can be transmitted to the jack X3. A ripple control receiver or a remote terminal unit can be used as a digital signal source, for example.

  • Digital signal source with up to 4 potential-free contacts

  • Connection cable

Requirements:

  • The signal source must be technically suitable for connection to the digital inputs Technical Data).

  • The connected digital signal source has a safe separation to the grid potential. When connecting the digital signal source the potential-free contact or an external potential-free contact is used.

  • The connection cable must be prepared for connection to the multipole terminal block Preparing the Connection Cable).

Overview:

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Pin assignment

Pin

Pin assignment

Explanation

1

DI1

Digital input

2

DI2

Digital input

3

DI3

Digital input

4

DI4

Digital input

5

DI5

Fast stop*

6

24 V

Voltage supply output

* With the fast-stop function, depending on the set inverter operating mode, inverters can be disconnected from the utility grid or enter into standby operation. For further information on SMA products with fast-stop function see manual of the SMA products.

Circuitry overview:

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Connection of a Ripple Control Receiver

  1. Connect the connection cable to the digital signal source (see the manual from manufacturer).
  2. Connect the connection cable to the supplied six-pole plug. For this, unlock the required terminal positions using a suitable tool and plug the conductors into these terminal positions.
  3. Connect the six-pole plug to terminal X3. Observe the pin assignment.
  4. Note the terminal assignment.