Transmitter factory settings, Termination with fail-safe, Cts-delay – Westermo MA-42 User Manual
Page 3: Selection of 2-/4-wire, S3 1 - 6, S1 s2 1 - 6
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6042-2002
Transmitter
Factory settings
Transmitter
activated
by
RTS
RTS
RTS
RTS
Always high
DTR
DTR
DTR
Always high
RTS
DTR
DTR
CTS
Controlled
by
DCD
Controlled
by
S2
S2
S2
S2
S3
ON
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
1 2 3 4 5 6
Termination (4-wire)
Termination (2-wire)
No termination
S3
S3
S3
Termination
with fail-safe
1)
ON
1 2 3 4 5 6
Always high Always low
Always active
S2
ON
1 2 3 4 5 6
Always high Always high
Always active
S2
ON
1 2 3 4 5 6
ON
1 2 3 4 5 6
CTS-delay
0ms
S2
S2
20ms
S2
ON
1 2 3 4 5 6
ON
1 2 3 4 5 6
Selection of 2-/4-wire
4-wire
S3
2-wire
S3
ON
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
1 2 3 4 5 6
S1 Selection of power supply 115V/230V AC
S2Selection of signal activating the transmitter
Selection of signal controlling DCD
Selection of CTS delay
S3 Selection of termination with fail-safe 1)
Selection of 2- or 4-wire communication
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.
ON
OFF
S3
1 - 6
ON
OFF
S1
S2
1 - 6
ON
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
1 2 3 4 5 6