How do I connect the Danfoss AK-SM 800A Frontend to the controllers in my refrigeration system? (Danfoss AK-SM 800A ADAP-KOOL User Guide)

Answer

manuals.plus

Jan 28, 2025 - 08:49 PM

To connect the Danfoss AK-SM 800A Frontend to the controllers in your refrigeration system, you will need to follow these steps:

1. Choose the appropriate communication type: The AK-SM 800A supports various forms of communication, including Lon RS485, Modbus, Lon TP 78, DANBUSS, and IP. Select the communication type that is compatible with your controllers.

2. Use the correct cable: Cables with twisted pairs must be used, and they may be provided with a screen. The specific cable requirements depend on the communication type. For example, Lon RS485, Modbus, and RS485 Third party communication require cables like Belden 9841 or Belden 3107A.

3. Connect the cables: Connect the cables from controller to controller, ensuring that no branches are allowed on the cable. Follow the wiring instructions provided in the manual for the specific communication type.

4. Terminate the cable: Each cable section must be terminated correctly. Use either an external resistor or a contact to terminate the cable. The termination should be made with a 120-ohm resistor.

5. Install repeaters if needed: If the total cable length exceeds 1200 m / 4000 ft, or if the data communication cable runs through an electrically noisy environment, you may need to install repeaters to stabilize the signal. Place the repeaters so that the length of the cable is evenly distributed.

6. Set the addresses: Connect voltage to each controller and set the address in the respective controllers. Ensure that each controller has a unique address to avoid conflicts.

7. Scan the network: Depending on the communication type, the System Manager may need to scan the network to find all connected controllers. Follow the instructions provided in the manual for the specific communication type.

8. Replace controllers or System Manager: If you need to replace a controller or the System Manager, follow the instructions provided in the manual. Remember to set the address of the new controller with the same address and add the controller to the System Manager again by starting the scan function.

Please refer to the complete user guide for the Danfoss AK-SM 800A and the specific communication type for detailed instructions and additional requirements.