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Switch settings md-63b, Selection of 2- or 4-wire, Selection of speed – Westermo MD-63 B User Manual

Page 3: Factory settings, Termination with fail-safe 1), Transmitted power

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6071-2022

Switch settings MD-63B

The MD-63B can through different switch settings be adapted to a variety of running
conditions. To set the switches,open the plastic case by removing the top cover.

1

2

3

4

5

L

N

MD-63

RS-422/485

POWER

R+

Rx

Tx

R- T+

T-

TD RD

PWR

1
2
3
456

789

S2:1-5

S1:1-9

Selection of 2- or 4-wire

S1

4-wire

ON

1 2 3 4 5 6 7 8 9

S1

2-wire

ON

1 2 3 4 5 6 7 8 9

Selection of speed

S1

Over 1 Mbit/s

ON

1 2 3 4 5 6 7 8 9

S1

Under 1 Mbit/s

ON

1 2 3 4 5 6 7 8 9

Factory settings

S1

ON

1 2 3 4 5 6 7 8 9

S1: 2 and 4-9 not used

Termination with fail-safe 1)

S2

ON

1 2 3 4 5

Termination (2-wire)

S2

ON

1 2 3 4 5

Termination (4-wire)

S2

ON

1 2 3 4 5

No termination

Transmitted power

S2

ON

1 2 3 4 5

Low

S2

ON

1 2 3 4 5

High

S2

ON

1 2 3 4 5

1) The fail-safe function forces the signal

state of the receiver to OFF when the
connected transmitter is in tri-state
(transmitter inactive). The receiver
located furthest away shall be
terminated.

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