Danfoss VLT 8000 AQUA Przewodnik Instalacji Pobierz pdf (Strona 28)

VLT® 8000 AQUA

61 Termination of serial communication.

See Earthing/Grounding of shielded

(armoured control cables.

This terminal is not normally to be

used.

68, 69 RS 485 interface, serial

communication. When multiple

AFD’s are connected to a

communication bus, switches

2 and 3 on control card in the

first and last units must be closed

(position ON). For the remaining

AFD’s, switches 2 and 3 must be

open (OFF). The factory setting is

closed (position ON).

■ Switches 1-4

The dipswitch is located on the control card. It is used

for serial communication and external DC supply.

The switching position shown is the factory setting.

Switch 1 has no function.

Switches 2 and 3 are used for terminating an RS

485 interface, serial communication. In the first and

the last AFD, switches 2 and 3 must be ON. In the

other AFD, switches 2 and 3 must be OFF.

Switch 4 is used if an external 24 V DC supply is required

for the control terminals. Switch 4 separates the

common potential for the internal 24 V DC supply from

the common potential of the external 24 V DC supply.

NOTE

Please note that when Switch 4 is in position

"OFF", the external 24 V DC supply is

galvanically isolated from the AFD.

MG.80.A6.22 - VLT is a registered Danfoss trademark

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Danfoss VLT 8000 AQUA Przewodnik Instalacji Strona 28