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Power connection md-54 dc, Power connection md-54 ac, Position screw-terminal – Westermo MD-54 User Manual

Page 5

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16

6605-2001

Power connection
MD-54 DC

2-position screw-terminal

Connection

Power

supply

– Voltage

+

+ Voltage

Screw

Power

supply

L

230V

N

AC power

Earth

Power connection
MD-54 AC

3-position screw-terminal

Line connection

Transmission range (RS-422/485)

Use twisted pair cable. Max transmission range 1200 metre.
(cable specifications 0.3 mm

2

and capacitance 42pF/m).

The transmission range will increase if a cable with lower capacitance and larger
diameter is used.
Use shielded cable in heavy industrial environments.

1) If shielded cable is used, connect the shield only at one end to avoid ground currents.

Twisted pairs

A’

B’

A

B

Transmitter

Receiver

MD-54

Receiver

Transmitter

Shield

1)

1

2

3

4

5

3

4

5

A/A’

B/B’

Transmitter/

Receiver

A/A’

B/B’

MD-54

Transmitter/

Receiver

RS-485

RS-422

Twisted pairs

RS-422
equipment

A

B

A’

B’

RS-485
equipment

Shield

1)