The contents of this document are provided “as is”. Except as required by applicable
law, no warranties of any kind, either express or implied, including, but not limited to,
the implied warranties of merchantability and fitness for a particular purpose, are made
in relation to the accuracy and reliability or contents 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 income
or any special, incidental, and consequential or indirect damages howsoever caused.
More information about Westermo can be found at the following Internet address:
http://www.westermo.com
3
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.
4
6617-2203
Agency approvals and standards compliance
Type Approval / Compliance
EMCEN 61000-6-2Immunity industrial environments
EN 55024Immunity IT equipment
EN 61000-6-3Emission residential environments
FCC part 15 Class B
EN 50121-4Railway signalling and telecommunications apparatus
IEC 62236-4Railway signalling and telecommunications apparatus
Safety EN 60950 IT equipment
Ex*EN 60079-0 and EN 60079-15 Explosive atmospheres – General requirements and type
* Only MDW-45 LV EX
"n" electrical appratatus
FCC Part 15.105 Notice: This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to Part 15 of the FCC Rules. These limits
are designed to provide reasonable protection against harmful interference
in a residential installation. This equipment generates, uses and can radiate
radio frequency energy and, if not installed and used in accordance with
the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio
or television reception, which can 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.
… Increase the separation between the equipment and receiver.
… Connect the equipment into an outlet on a circuit
different from that to which the receiver is connected.
… Consult the dealer or an experienced radio/TV technician for help.
5
6617-2203
ATEX Information (Applicable for MDW-45 LV EX only)
General
This unit is intended for use in Zone 2 hazardous location only.
Marking
II 3 G
Ex nA IIC 136°C (T3) Gc
SPECIAL CONDITION
WARNING – DO NOT SEPARATE WHEN ENERGIZED
Indicate that this unit complies with relevant European standards that are
harmonised with the 94/9/EC Directive (ATEX).
II
3
G
ExIndicates that this unit is in conformity with relevant European Ex standard(s).
nA
IICGas group, a typical gas i hydrogen.
136°C (T3)
Gc
SPECIAL
CONDITION
Equipment group II.
This unit can be installed in all places with an explosive gas atmosphere other
than mines susceptible to firedamp.
Equipment category 3.
A category is the classification according to the required level of protection.
This unit ensures the requisite level of protection during normal operation
and is intended for use in areas in which explosive atmosphere caused by
gases, vapours, mists, or dust mixtures are unlikely to occure or, if they do
occure, are likely to do so only infrequently and for a short periode only.
Indicates protection concerning explosive atmospheres caused by gases,
vapours or mists (G).
The type of protection used.
This unit is a non-sparking device "nA" which is constructed to minimize
the risk of occurence of arcs or sparks capable of creating an ignition
hazard during conditions of normal operation.
Maximum surface temperature assigned = 136°C with the next highest
temperature class T3 (T3 = 200 °C).
This unit is classified in accordance with its maximum surface temperature
(external and internal).
Equipment protection level Gc (EPL Gc)
Equipment for explosive gas atmospheres, having a "enhanced" level of protection, which is not a source of ignition in normal operation and which may have
some additional protection to ensure that it remains inactive as an ignition
source in the case of regular expected occurences. EPL Gc are analogous to
the ATEX Categories (Category 3 G = EPL Gc).
This unit has a special condition for safe use.
The special conditon for safe use contains safety related information that is
necesarry for the correct installation and safe use.
6
6617-2203
Ratings and safety control drawing
Power 12 – 48 VDC; 95 mA
Ambient temperature –40ºC ≤ Ta ≤ +70ºC
Maximum surface temperatur 136 ºC (temperatur class T3)
Degree of protectionIP21
Installation spacingMinimum 25 mm above / below and minimum 10 mm left / right
RS-232
Position Direction* / descriptionInput /Output values
1Not connected
2Out / Received Data (RD)
3In / Transmitted Data (TD)
4Not connected
5– / Signal Ground (SG)
6Out / Data Set Ready (DSR)
7In / Request To Send (RTS)
8Out / Clear To Send (CTS)
9Not connected
RS-422/485
Position Direction* / descriptionInput /Output values
1In / R+ line RS-422U
2In / R– line RS-422
3In / Out / T+ line RS-422/485
4In / Out / T– line RS-422/485
U
= ± 12 Vpk
max
I
= ± 60 mA
max
Data rate:
1.2 – 115.2 kbit/s
= ± 5 Vpk
max
I
= ± 250 mA
max
Data rate:
1.2 – 115.2 kbit/s
Power – LV
Position
Galvanically isolated via power transformer and optocoupler.
Capacitively isolated via Y1 capacitor rated 440 Vrms 3300 pF.
Direction* /
description
1In / COM
2In / +VA
3In / +Voltage B
4In / Common
Intput values
Uin = 9.6 – 57.6 VDC
Maxin = 0.16 A @ 9.6 VDC
PIn = 2 W
7
6617-2203
SPECIAL CONDITION FOR SAFE USE
Ambient temperature:
This unit is designed for use in extreme ambient temperature conditions according to the following:
–40ºC ≤ Ta ≤ +70ºC
Installation in an apparatus cabinet:
This unit requires installation in an Ex certified apparatus cabinet suitable for the area of use and
providing a degree of protection of at least IP54.
Resistance to impact:
This unit requires installation in an apparatus cabinet where adequate resistance to impact is provided by the apparatus cabinet. See "Installation in an apparatus cabinet" above for requirements on
the external apparatus cabinet.
Resistance to light:
This unit requires installation in an apparatus cabinet where it is protected from light
(for example daylight or light from luminaires).
See "Installation in an apparatus cabinet" above for requirements on the external apparatus cabinet.
Secureness of plugs:
When this unit is installed in an explosive atmospheres, all connectors must be mechanically secured
to prevent loosening.
Conductor temperature:
When this unit is installed in locations with high ambient temperature, special precautions shall be
taken upon the choice of external conductor(s) and the temperature rating of the conductor(s).
Directive 94/9/EC alongside with other directives:
Directive 2004/108/EC (EMC) applies and to assure a safe performance of this unit under the scope
of Directive 94/9/EC, refer to the electromagnetic immunity level specified under "Type tests and
environmental conditions" in this manual.
SurgeEN 61000-4-5Signal ports unbalanced ± 2 kV line to earth, ± 2 kV line to line
RF conductedEN 61000-4-6Signal ports10 V 80% AM (1 kHz), 0.15 – 80 MHz
Magnetic eld, power freq.EN 61000-4-8Enclosure100 A/m, 50 Hz, 16.7 Hz & 0 Hz
Pulse Magnetic eldEN 61000-4-9Enclosure300 A/m, 6.4 / 16 ms pulse
Voltage dips and interruption EN 61000-4-11 AC power ports10, 20 & 5000 ms, interruptions
Mains freq. 50 HzEN 61000-4-16 Signal ports100 V 50 Hz
Mains freq. 50 HzSS 436 15 03Signal ports250 V 50 Hz
Voltage dips and interruption EN 61000-4-29 DC power ports10 & 100 ms, interruption
Radiated emission EN 55022EnclosureClass B
FCC part 15Class B
Conducted emissionEN 55022AC power portsClass B
FCC part 15AC power portsClass B
EN 55022DC power portsClass B
Dielectric strengthSignal port to all other 2 kVrms 50 Hz 1min
MDW-45 LV EX Any port to any port
Environmental
TemperatureOperating–40 to +70°C
HumidityOperating5 to 95% relative humidity
AltitudeOperating2 000 m / 70 kPa
Service lifeOperating10 year
VibrationIEC 60068-2-6Operating7.5 mm, 5 – 8 Hz
ShockIEC 60068-2-27 Operating15 g, 11 ms
Packaging
Enclosure, MDW-45UL 94PC / ABSFlammability class V-1
Enclosure, MDW-45 EXCabelec 6141
Dimension W x H x D35 x 121 x 119 mm
Weight0.19 kg
Degree of protectionIEC 529EnclosureIP 21
CoolingConvection
MountingHorizontal on 35 mm DIN-rail
2 kVrms 50 Hz 1min (@ rated power < 60V)
0,5 kVrms 50 Hz 1 min
2 g, 8 – 500 Hz
11
6617-2203
Fuctional description
RS-422/485RS-232
3
4
T+
T−
TD LEDTD LED
3
TD
CTS
LED
S2:4
F1
0V
+5V
1
2
R+
R−
RTS
CTS
RD
RD
LED
7
8
2
B
B
0V
SG
S1:6
DSR
6
+5V
5
S2:2
S2:1
S2:3
Power
supply
Isolated power supply
0V
+5V
+5V
Bus termination
0V
B
B
+5V
Bus termination
0V
B
B
A
A
A
RTS LED
MCU
The MDW-45 is an RS-422/485 to RS-232 converter. This device can be used in multidrop and point to point applications to connect devices like PCs, PLCs, drives and other
automation equipment.
In 2-wire half duplex applications (RS-485) the MDW-45 can 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 possible
is 115.2 kbit/s.
Data format7 or 8 data bit, Odd, even or none parity, 1 or 2 stop bit
ConnectionDetachable screw terminal
Connector size0.2 – 2.5 mm² (AWG 24-12)
Transmission range In accordance with EIA RS-485
≤ 1200 m, depending on data rate and cable type
Settings120 Ω termination and failsafe biasing 680 Ω , by DIP-switch
ProtectionInstallation Fault Tolerant (up to ±60 V)
RS-232
Electrical specificationRS-232
Data rate1 200 bit/s – 115.2 kbit/s
Data format7 or 8 data bit, Odd, even or none parity, 1 or 2 stop bit
Connection9-pin D-sub female DCE
Transmission range15 m
MDW-45 HV
110 to 250 VDC
88 to 300 VDC
21 mA @ 95 VAC
10 mA @ 110 VDC
13
6617-2203
Locations of Interface ports, LED`s and DIP-switches
S1 DIP-switch under lid
(for details see page 10)
RS-422/485 interface
LED indicators
(for details see page 8)
screw terminal
4-position Direction* Description
No. 1In R+
No. 2In R–
No. 3In/Out T+
No. 4In/Out T–
line RS-422
line RS-422
line RS-422/485
line RS-422/485
S2 DIP-switch
Termination
(for details see page 11)
RS-232 (DCE)
9-position Direction Description
No. 1–
No. 2OutReceived Data (RD)
No. 3In Transmitted Data (TD)
No. 4–
No. 5–Signal Ground (SG)
No. 6OutData Set Ready (DSR)
No. 7InRequest To Send (RTS)
No. 8Out Clear To Send (CTS)
No. 9–
Power connection, LV
screw terminal
2-position Description
No. 10 VDC
No. 212 – 48 VDC
Power connection, HV
screw terminal
2-position Description Product marking
No. 1
No. 2
AC: Neutral
DC: –Voltage
AC: Line
DC: +Voltage
N/–
L/+
Railway installation
close to the rails
(RS-232, RS-422/485)
For a cable located inside 3 m boundary and
connected to this port, the use of shielded
cable is recommended, this to minimize the
risk of interference. The cable shield should
be properly connected (360°) to an earthing
point within 1 m from this port. This earthing point should have a low impedance connection to the conductive enclosure of the
apparatus cabinet, or similar, where the unit
is built-in. This conductive enclosure should
be connected to the earthing system of an
installation and may be directly connected to
the protective earth.
14
6617-2203
LED Indicators
LEDStatus Description
PWRONIn service
OFFOut of service
TDONTransmitted Data: Displays data received from the local RS-232 port
OFFNo data
RDONReceived Data: Displays data leaving the modem on the RS-232 port
OFFNo data
RTSONStatus of RTS from the RS-232 interface
OFFNo RTS
CTSONStatus of CTS from the RS-232 interface
OFFNo CTS
15
6617-2203
DIP-switch settings
Supervision table when selecting data format
7 bit
8 bit
No parity
Parity
1 stop bit
2 stop bit
Number of bit910101011111112
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
!
Before DIP-switch settings:
Prevent damage to internal electronics from electrostatic discharges (ESD)
by discharging your body to a grounding point (e.g. use of wrist strap).
S1
Selection of data rate
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
Selection of bus format
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
In RTS-control and Transmitter always active. The
switches for data rate and number of bits has
no effects.
1200 bit/sS1
2400 bit/sS1
4800 bit/sS1
9600 bit/sS1
19.2 kbit/sS1
38.4 kbit/sS1
57.6 kbit/sS1
115.2 kbit/sS1
2-wire RS-485S1
4-wire RS-422S1
Selection of data format
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
* See Supervision table when selecting data bits.
Turning time 1 – 1.5 bit time
Selection of bus control
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
S1
1 2 3 4 5 6 7 8
9 bit format*S1
10 bit format*S1
11 bit format*S1
12 bit format*S1
Data controlS1
RTS-control S1
Transmitter
always active
16
6617-2203
S2 Below panel, RS-422/485 termination
No termination and fail-safe
ON
1 2 3 4
Termination with fail-safe (2-wire)
ON
1 2 3 4
Termination with fail-safe (4-wire)
ON
1 2 3 4
Note! DIP-switch alterations are only effective after a power on.
Factory settings
ON
S1S2
1 2 3 4 5 6 7 8
Data rate – 9600 bit/s, data format – 10 bit
Bus format, 2-wire
Note: Switch 1:8 is not used
ON
1 2 3 4
No termination
and fail-safe
17
6617-2203
Unit specific description
=Termination
Max 32 connections
Max 1 200 metres
Max 0.3 metre
=Termination
Max 32 connections
T+
T–
T+T–T+T–T+T–
R+
R–
T+
T–
R– R+R+T–T–T+R– R+ T– T+T+R–
When the converter is set to data-control mode the transmitter is activated by data on
TD (RS-232).The time the transmitter stays active corresponds to one character-time
plus the turning time for the set data rate and number of bits. If more data arrives on
TD before the turning time has expired the transmitter stays active for an additional
one character time and so on. In RTS-control mode the transmitter is activated by the
RS-232 RTS-signal. In this mode the dip-switches for data rate and number of bits have
no effect. The LED indicators show the status of the data signals. The fail-safe termination
ensures that the signal level at the receiver is in ‘mark state’ (differential>0.2 Volts) 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
installed it should always form a bus structure (see diagrams). Star shaped networks
should never be created; there are other Westermo products that can be used to create
star net applications. To install a system according to the RS-422/485 specification it is
very important that the line is terminated at the correct points. The recommendation is
to terminate the receiver on the master unit and the final bus slave unit. See diagrams for
details of how this is done with RS-485 (2-wire) and RS-422 (4-wire).
N.B. R+/R–, T+/T– definitions are not standard, it can help to shift + and –
if the unit does not work.
18
6617-2203
Line connection
4-wire
RS-422/485
T+
T–
R+
R–
equipment
Transmitter
Receiver
MDW-45
Receiver
Transmitter
1
R+
2
R–
3
T+
4
T–
Twisted pairs
*) If shielded cable is used, connect the shield only at one end to avoid ground currents.
2-wire
MDW-45
Transmitter/
Receiver
Twisted pairs
3
T+/R+T+/R+
4
T–/R–T–/R–
RS-422/485
equipment
Transmitter/
Receiver
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 waterproof. 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
distributor office or Westermo Tech support.
Westermo Data Communications
939 N. Plum Grove Road, Suite F,
IL 60173 Schaumburg, USA
Tel: +1 847 619 6068 • Fax: +1 847 619 66 74
info@westermo.com • www.westermo.com
Taiwan
Westermo Data Communications
F2, No. 188, Pao-Chiao Rd. Shing-Tien City,
Taipei 23145
Tel: +886 2 8911 1710
sales.cn@westermo.com • www.cn.westermo.com
China
Westermo Data Communications
2F Building B
No.1618 Yishan Road
Shanghai 201103
Tel: +86 21 6145 0400 • Fax: +86 21 6145 0499
sales.cn@westermo.com • www.cn.westermo.com
Westermo Teleindustri AB have distributors in several countries, contact us for further information.
REV.C 6617-2203 2012-11 Westermo Teleindustri AB, Sweden – A Beijer Electronics Group Company
Loading...
+ hidden pages
You need points to download manuals.
1 point = 1 manual.
You can buy points or you can get point for every manual you upload.