Connecting the battery communication cable for Modbus

Qualified person

If the Modbus interface of the inverter is to be used for battery communication, use the BAT ETH socket to connect the battery communication cable.

DANGER

Danger to life due to electric shock in case of overvoltages and if surge protection is missing

Overvoltages (e.g., in the event of a flash of lightning) can be further conducted into the building and to other connected devices in the same network via the network cables or other data cables if there is no surge protection. Touching live parts and cables results in death or lethal injuries due to electric shock.

  1. Ensure that all devices in the same network and the battery are integrated into the existing surge protection.
  2. When laying the network cables or other data cables outdoors, it must be ensured that a suitable surge protection device is provided at the transition point of the cable from the product or the battery outdoors to the inside of a building.

Additionally required material (not included in the scope of delivery):

  • Battery data cable(s)

  • Where required: Field-assembly RJ45 connector with metal enclosure

Procedure:

  1. Disconnect the product from voltage sources ( > Disconnecting the Inverter from Voltage Sources).
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  2. When cover of the enclosure is closed: unscrew the screw on the cover of the enclosure (hex socket, AF10) and remove the cover of the enclosure.
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  3. Unscrew the swivel nut from the cable gland.
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  4. Thread the swivel nut over the data cable of the battery.
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  5. Remove the two-hole cable support sleeve from the cable gland.
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  6. For the battery data cable, remove a plug from one of the enclosure openings and for the battery data cable cut an enclosure opening with a utility knife.
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  7. Insert the battery data cable into an enclosure opening.
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  8. Press the cable support sleeve into the 2-hole cable gland and guide the battery data cable to the socket BAT ETH. Lay the battery data cable according to the installation plan and attach it to the brackets.
  9. When using self-assembly cables, assemble the RJ45 connectors and connect them to the cable.
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  10. Plug the RJ45 connector of the battery data cable into the socket BAT ETH of the communication assembly.
  11. Firmly tighten the swivel nut on the cable gland.
  12. Ensure that the battery data cable is securely in place by pulling slightly on it.
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  13. Attach one ferrite included in the scope of delivery to each battery communication cable.
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  14. Tighten the swivel nut on the cable gland hand-tight. This will secure the battery data cables.
  15. If the product is installed outdoors, install overvoltage protection for all components in the network.
  16. Connect the other end of the battery data cable to the battery.

    Also see:

    Connecting the Network Cables
    Connecting the battery communication cable for CAN