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Switch settings LD-64
Selection of 2- or 4-wire
ON
S1
1 2 3 4 5 6 7 8 9
ON
S1
1 2 3 4 5 6 7 8 9
Selection of 2-wire RS-485 or 4-wire RS-422.
For RS-232 S1:1 can be ignored.
Selection of Master/Slave
ON
S1
1 2 3 4 5 6 7 8 9
ON
S1
1 2 3 4 5 6 7 8 9
Please note that only one master can be
used per system.
Selection of bits
ON
S1
1 2 3 4 5 6 7 8 9
ON
S1
1 2 3 4 5 6 7 8 9
ON
S1
1 2 3 4 5 6 7 8 9
ON
S1
1 2 3 4 5 6 7 8 9
* Use this setting for synchronous or other
asynchronous protocols.
The transmitter will be active from the
startbit to 10 bit-times after the last high
databit (see example below). The speed
shall be set to ≅ 10 times the required
communication speed.
Example 19 200 bit/s
Start bit
Data rate 19 200
1 bit = 52µs
Transmitter active
10x52µs = 520µs
Set the speed to 187.5 kbit/s
6073-2002
4-wire
2-wire
S1
S1
S1
Slave
S1
Master
S1
S1
9
10
S1
11
S1
*
S1
S1
1 bit: 1/19 200 = 52µs
S1:3 not used
Turning Time/Data rate/
Connected units
Turning-
time
ON
0.4 ms
1 2 3 4 5 6 7 8 9
ON
0.2 ms
1 2 3 4 5 6 7 8 9
ON
0.1 ms
1 2 3 4 5 6 7 8 9
ON
50 µs
1 2 3 4 5 6 7 8 9
ON
25 µs
1 2 3 4 5 6 7 8 9
ON
16 µs
1 2 3 4 5 6 7 8 9
ON
11 µs
1 2 3 4 5 6 7 8 9
ON
9 µs
1 2 3 4 5 6 7 8 9
ON
6 µs
1 2 3 4 5 6 7 8 9
ON
3 µs
1 2 3 4 5 6 7 8 9
*) For other speeds please contact
**) For additional units please contact
Transmission*
Number**
rate
of units
2 400 bit/s
4 800 bit/s
9 600 bit/s
19 200 bit/s
38 400 bit/s
62 500 bit/s
93 750 bit/s
115.2 kbit/s
187.5 kbit/s
375 kbit/s
Westermo
Westermo
20
20
20
20
20
20
20
15
10
5
17
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