Westermo MD-63 B - Manual (Page 3)

9 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.