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9

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.

AAAA

AAAA

AA

AA

AA

AA

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

Summary of Contents for MA-42 AC

Page 1: ...485 RS 232 RS 422 485 Wandler INSTALLATIONSANVISNING INSTALLATION MANUAL INSTALLATIONS ANLEITUNG 6042 2002 www westermo se MA 42 AC MA 42 DC Westermo Teleindustri AB 1999 REV A Galvanic Isolation Tra...

Page 2: ...itter and receiver 7V Surge capacity 0 6 kW for 1ms Power supply Switchable 115 230V 15 10 48 62Hz Fuse 100 mA fast 5x20mm Power consumption Max 25 mA at 230V AC Temperature range 5 50 C ambient tempe...

Page 3: ...ay 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 S2 Selection of sign...

Page 4: ...CCITT V 24 Circuit number Line connection 1 If shielded cable is used connect the shield only at one end to avoid ground currents Transmission range interface 2 Use twisted pair cable Max transmission...

Page 5: ...n 1000V Fuse F1 1 6A fast 5x20 mm All other specifications according to MA 42 AC Switch settings According to MA 42 AC Connections According to MA 42 AC except power supply Connection no Power Supply...

Page 6: ...done with RS 485 2 wire and RS 422 4 wire On 4 wire systems when the MA 42 is working as a slave the transmitter is linked to the same bus as all the other slaves transmitter A status signal RTS or D...

Page 7: ...13 6042 2002 Max 1200 metres Max 32 connections Max 32 connections Shortest possible max 0 3 metres Termination 3 4 4 1 4 2 3 1 4 2 3 1 4 3 3 4 3 4 3 1 2 3 4 Termination...

Page 8: ...w westermo de Westermo Data Communications Ltd Unit 14 Talisman Business Centre Duncan Road Park Gate Southampton SO31 7GA Phone 44 0 1489 580 585 Fax 44 0 1489 580586 E Mail sales westermo co uk Web...

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