Westermo MA-12 User Manual
Korthållsmodem
Short haul modem
Kurzstreckenmodem
INSTALLATIONSANVISNING
INSTALLATION MANUAL
INSTALLATIONS ANLEITUNG
6012-2001
www.westermo.se
MA-12 AC
MA-12 DC
©
Westermo Teleindustri AB • 1999 • REV. A
Galavanic
Isolation
CE
Approved
Balanced
Transmission
Transient
Protection
8 6012-2001
Specifications MA-12
Transmission Asynchronous, full/half duplex or simplex
Interface 1 EIA RS-232-C/CCITT V.24/V.28
25-position D-sub female, DCE
Interface 2 ±10mA balanced current loop
Data rate Up to 38 400 bit/s
Indicators Power, RD, DCD, RTS, TD
Isolation Galvanic insulation with opto-coupler (data transmission)
and transformer (supply)
Insulation voltage 1500V
Overvoltage protection Nät: Breakdown voltage 440V at 230V AC and
220V at 115V AC
Interface 2: Breakdown voltage
transmitter 15V and receiver 5.8V
Surge capacity 0.6 kW for 1 ms
Power supply Switchable 115/230V +15/–10% 48–62Hz
Fuse 100 mA fast 5x20 mm
Power consumption Max 4VA at 230V
Temperature range 5–50°C, ambient temperature
Humidity 0–95% RH, non-condensing
Dimensions 161x139x53 mm
Weight 0.5 kg
Mounting With rubber pads or screws.
Screws: Remove the two ’’keyholes’’ on the bottom
of the case
96012-2001
Danger! Do not open connected unit
12345
LINE
CONNECTION
V.24/RS-232-C
CONNECTION
Switch settings
Transmitter (carrier) activated by
ON
123456789
S1
Always active
ON
123456789
S1
AUX
ON
123456789
S1
SRS
ON
123456789
S1
RFR
ON
123456789
S1
RTS
ON
123456789
S1
DTR
ON
123456789
S1
DTR and AUX
ON
123456789
S1
DTR and SRS
ON
123456789
S1
DTR and RFR
ON
123456789
S1
DTR and RTS
CTS controlled by
ON
123456789
S1
RTS
ON
123456789
S1
Always high
ON
123456789
S1
DCD
ON
123456789
S1
Factory settings
ON
1 2 3 4 5 6 7 8 9
S2
S1
ON
OFF
S1 Selection of signal activating transmitter (carrier)
Selection of signal controlling CTS
S2 Selection of power supply 115/230V AC
Switch settings MA-12
The MA-12 can through different switch settings be adapted to a variety of running conditions. To set the switches, open the plastic case by placing and turning a screw-driver
between top and bottom at the rear of the case.
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