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6617-2203

Safety

Before using this unit:

Read this manual completely and gather all information on the unit. Make sure 
that you understand it fully. Check that your application does not exceed the safe 
operating specifications for this unit. 

Hazardous voltage may occur within this unit when connected to power supply  
or TNV circuits.

Prevent access to hazardous voltage by disconnecting the unit from power supply 
and all other electrical connections. 

Prevent damage to internal electronics from electrostatic discharges (ESD) by  
discharging your body to a grounding point (e.g. use of wrist strap).

Before installation:

This unit should only be installed by qualified personnel.
This unit should be built-in to an apparatus cabinet, or similar, where access is 
restricted to service personnel only.
The power supply wiring must be sufficiently fused, and if necessary it must be 
possible to disconnect manually from the power supply. Ensure compliance to 
national installation regulations.
This unit uses convection cooling. To avoid obstructing the airflow around the unit, 
follow the spacing recommendations (see Installation section).

Care recommendations

Follow the care recommendations below to maintain full operation of unit and to fulfil 
the warranty obligations.
This unit must not be operating with removed covers or lids.
Do not attempt to disassemble the unit. There are no user serviceable parts inside.
Do not drop, knock or shake the unit, rough handling above the specification may cause 
damage to internal circuit boards.
Do not use harsh chemicals, cleaning solvents or strong detergents to clean the unit.
Do not paint the unit. Paint can clog the unit and prevent proper operation.
Do not expose the unit to any kind of liquids (rain, beverages, etc). The unit is not water-
proof. Keep the unit within the specified humidity levels.
Do not use or store the unit in dusty, dirty areas, connectors as well as other mechanical 
part may be damaged.
If the unit is not working properly, contact the place of purchase, nearest Westermo dis-
tributor office or Westermo Tech support.

Maintenance

No maintenance is required, as long as the unit is used as intended within the specified 
conditions.

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Summary of Contents for MDW-45

Page 1: ...Westermo Teleindustri AB MDW 45 www westermo com User Guide 6617 2203 Converter RS 232 RS 422 485...

Page 2: ...of this document Westermo reserves the right to revise this document or withdraw it at any time without prior notice Under no circumstances shall Westermo be responsible for any loss of data or incom...

Page 3: ...it uses convection cooling To avoid obstructing the airflow around the unit follow the spacing recommendations see Installation section Care recommendations Follow the care recommendations below to ma...

Page 4: ...be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Reorient or relocate the receiving antenna Increas...

Page 5: ...CTS 9 Not connected RS 422 485 Position Direction description Input Output values 1 In R line RS 422 Umax 5 Vpk Imax 250 mA Data rate 1 2 115 2 kbit s 2 In R line RS 422 3 In Out T line RS 422 485 4 I...

Page 6: ...n electrical and electronic equipment RoHS References of standards applied for this EC declaration of conformity No Title Issue EN 61000 6 1 Electromagnetic compatibility Immunity for residential envi...

Page 7: ...S References of standards applied for this EC declaration of conformity No Title Issue EN 61000 6 1 Electromagnetic compatibility Immunity for residential environments 2007 EN 61000 6 2 Electromagneti...

Page 8: ...00 ms 30 reduction 100 200 1 000 ms 60 reduction Mains freq 50 Hz EN 61000 4 16 Signal ports 100V 50 Hz Mains freq 50 Hz SS 436 15 03 Signal ports 250V 50 Hz Voltage dips and interruption EN 61000 4 2...

Page 9: ...an automatically control the state of the data bus based just on the data it receives This allows the unit to be used with equipment that has no handshaking signal The maximum transmission rate possib...

Page 10: ...5 mm AWG 24 12 RS 422 485 Electrical specification RS 485 Data rate 1 200 bit s 115 2 kbit s Data format 7 or 8 data bit Odd even or none parity 1 or 2 stop bit Connection Detachable screw terminal C...

Page 11: ...m from this port This earth ing point should have a low impedance con nection to the conductive enclosure of the apparatus cabinet or similar where the unit is built in This conductive enclosure shoul...

Page 12: ...e TD ON Transmitted Data Displays data received from the local RS 232 port OFF No data RD ON Received Data Displays data leaving the modem on the RS 232 port OFF No data RTS ON Status of RTS from the...

Page 13: ...control ON 1 2 3 4 5 6 7 8 Data control S1 ON 1 2 3 4 5 6 7 8 RTS control S1 ON 1 2 3 4 5 6 7 8 Transmitter always active S1 Selection of bus format ON 1 2 3 4 5 6 7 8 2 wire RS 485 S1 ON 1 2 3 4 5 6...

Page 14: ...s data format 10 bit Bus format 2 wire No termination and fail safe Note Switch 1 8 is not used No termination and fail safe ON 1 2 3 4 Termination with fail safe 2 wire ON 1 2 3 4 Termination with fa...

Page 15: ...ts when there is no data on the RS 485 bus Full duplex is only possible if 4 wires are used Field of application RS 422 and RS 485 were both designed for multidrop applications When a system is instal...

Page 16: ...and prevent proper operation Do not expose the unit to any kind of liquids rain beverages etc The unit is not waterproof Keep the unit within the specified humidity levels Do not use or store the uni...

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Page 20: ...infos westermo fr www westermo fr Germany info westermo de www westermo de North America info westermo com www westermo com Singapore sales westermo com sg www westermo com Sweden info sverige wester...

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