Westermo MA-49 User Manual
Omvandlare RS-232 – RS-422/485
Converter RS-232 – RS-422/485
Wandler RS-232 – RS-422/485
INSTALLATIONSANVISNING
INSTALLATION MANUAL
INSTALLATIONS ANLEITUNG
6049-2001
www.westermo.se
MA-49
©
Westermo Teleindustri AB • 1999 • REV. A
Galvanic
Isolation
Transient
Protection
Balanced
Transmission
CE
Approved
8 6049-2001
Specifications
Transmission Asynchronous, full/half duplex or simplex
Interface 1 EIA RS-232-C/RS-423-A
ITU-T V.24/V.10
25-position D-sub female, DCE
Interface 2 EIA RS-422/RS-485/ITU-T V.11
Data rate Up to 100 kbit/s
Indicators RTS, CTS, DCD, RD, TD
+12 V, –12 V
Isolation Galvanic insulation with opto-coupler (data transmission)
and transformer (supply)
Isolation voltage 1 500 V
Overvoltage protection Breakdown voltage transmitter and receiver 7 V.
Surge capacity 0.6 kW for 1ms.
Power supply External through PS-02 mounted in rack RV-01.
±20 V DC ±20%
Fuse 2x100 mA fast 5x20 mm
Power consumption +20 V 70 mA, –20 V 80 mA
Temperature range 5–50°C, ambient temperature
Humidity 0–95% RH, non-condensing
Dimensions 100x100 mm
Weight 0.1 kg
Mounting To be mounted in rack RV-01, takes one card slot.
NOTE! Max 9 MA-49 with one power supply (PS-02) in rack RV-01.
96049-2001
Selection of signal
activating
CTS
delay
Switch settings
The MA-49 can through different switch settings be adapted to a variety
of running conditions.
S2 Selection 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
S2 RTS RTS RTS
Transmitter
activated by
CTS
controlled
by
DCD
controlled
by
ON
123456
S2 RTS RTS
Always
high
ON
123456
S2 DTR DTR DTR
ON
123456
S2 DTR DTR
Always
high
ON
123456
S2
Always
active
Always
high
Always
high
ON
123456
S2
Always
active
Always
high
Always
high
ON
123456
S2 0ms
ON
123456
S2 20ms
ON
123456
Factory settings
S2
ON
123456
S3
ON
123456
Termination
with fail-safe 1)
S3
Receiver
termination (4-wire)
ON
123456
S3
Transmitter/Receiver
termination (2-wire)
ON
123456
S3 No termination
ON
123456
Selection of 2-/4-wire
S3 4-wire
ON
123456
S3 2-wire
ON
123456
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.
S2
1 – 6
S3
ON
1 – 6
OFF
ON
OFF
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