Technical data

46 OM 1191

Embedded Fieldbus

Mechanical and Electrical Installation–EFB

WARNING

Connections should be made only while the drive is

disconnected from the power source.

• UseBelden9842orequivalent.Belden9842isadual

twisted, shielded pair cable with a wave impedance of

120Ω.

• Use one of these twisted shielded pairs for the RS485

link. Use this pair to connect all A (-) terminals together

and all B (+) terminals together.

• Use one of the wires in the other pair for the reference/

common (terminal 31), leaving one wire unused.

• Do not directly ground the RS485 network at any

point. Ground all devices on the network using their

corresponding earthing terminals.

• As always, the grounding wires should not form any

closed loops, and all the devices should be earthed to a

common ground.

• Connect the RS485 link in a daisy-chained bus, without

dropout lines.

• To reduce noise on the network, terminate the RS485

networkusing120Ωresistorsatbothendsofthe

network. Use the DIP switch to connect or disconnect

the termination resistors. See following wiring

diagram. The MD5 termination resistor (J-2) are active

terminators. This active circuit includes bins (“Pull-up”

and “Pull-down”) resistors.

• Connect the shield at each end of the cable to a drive.

On one end, connect the shield to terminal 28, and on

the other end connect to terminal 32. Do not connect

the incoming and outgoing cable shields to the same

terminals, as that would make the shielding continuous.

• Forcongurationinformationseethefollowing:

— Communication Setup – EFB on page 48.

— Activate Drive Control Functions – EFB on page

50..

Figure 7: Preferred Wiring Diagram