Omvandlare, optisk fiber – RS-232/V.24
Converter, fibre-optic – RS-232/V.24
Glasfaser Wandler – RS-232/V.24
INSTALLATIONSANVISNING
INSTALLATION MANUAL
INSTALLATIONS ANLEITUNG
6070-2001
www.westermo.se
MD-62 AC
MD-62 DC
©
Westermo Teleindustri AB • 2000 • Rev. B
Galvanic
Isolation
Transient
Protection
CE
Approved
8 6070-2001
Specifications MD-62
Transmission Asynchronous, full/half duplex or simplex
Interface 1 EIA RS-232/CCITT V.24 9-position D-sub connector
female or 9-position detachable screw-terminal
Interface 2 ST-connectors, see table of power budget
Data rate Up to 115.2 kbit/s
Indicators Power, TD, RD, RTS, CTS
Temperature range 5-50°C ambient temperature
Humidity 0-95% RH without condensation
Dimension 55x100x128 mm ( WxHxD)
Weight 0.4 kg AC / 0.25 kg DC
Mounting On 35 mm DIN-rail
Power supply alternatives
Model description
MD-62 MD-62 MD-62 MD-62
AC 115V AC DC 36–55V DC
Power supply 230V AC 115V AC 24V DC 48V DC
+15/–10% +15/–10% +50/–50% +15/–25%
Frequency 48–62Hz 48–62Hz – –
Fuse, F2 100mA S 100mA S 1.6A S 1.6A S
5x20 mm 5x20 mm 5x20 mm 5x20 mm
Littelfuse Littelfuse Littelfuse Littelfuse
Power consumption 5VA 5VA 3W 3W
Overvoltage protection 430V 220V – –
Isolation 1 500V 1 500V 500V 500V
RMS
Functional description MD-62
MD-62 is developed for RS-232 point to point communication via fibre optic cables.
Transmission rates up to 115.2 kbit/s and transmission distances up to 25 km is possible.
The MD-62 consists of one F/O channel with separate transmitter and receiver, Tx and
Rx. On the front of the unit there are also three LED’s indicating the data transmission
on the channel. The fibre optical cable is completely immune to external interference,
which makes it ideal for harsh environments.
96070-2001
50/125 µm 3.0 dB/km 1.0 dB/km
62.5/125 µm 3.5 dB/km 1.2 dB/km
100/140 µm 4.0 dB/km
9/125 µm 0.5 dB/km
Fibre
Attenuation
at 820 nm
Attenuation
at 1300 nm
Attenuation
at single mode (1300 nm)
Attenuation in fibre cable
The values below can differ depending on quality and manufacturer of the fibre-optic
cable.
Attenuation in connectors Attenuation in splice
0.2–0.4 dB Fusion 0.1 dB
Mecanical 0.2 dB
50/125 16.6 dB 14.6 dB
62.5/125 18.6 dB 15.1 dB
100/140 25.9 dB
9/125 12.3 dB
50/125 10.7 dB 8.1 dB
62.5/125 14.5 dB 11.6 dB
100/140 20.6 dB
9/125 6.3 dB
Unit
820 nm 1300 nm single mode
Unit
820 nm 1300 nm single mode
Min. budget Typ. budget
Power budget
”Min. budget” states the minimum guaranteed power budget. Experience shows however that the
typical value is in the range of the indicated ”Typ. budget”.
Fibre
Fibre
10 6070-2001
Switch settings MD-62
The MD-62 can, through switch settings, be set in to several modes. To set the switches,
open the plastic case by removing the top cover.
Status signal
Factory settings
S1 Enabled
ON
123456789
S1 Disabled
ON
123456789
S1
ON
123456789
S2
ON
12345
S2
ON
12345
Switch S1: 2–9 not used
Transmitted power
Low
S2
ON
12345
High
Switch S2: 1–4 not used
S1:1-9 S2:1-5
116070-2001
Screw Power
no. supply
L 115*/230V
N AC power
PE/Protective Earth
Connections MD-62
Terminal connection (DCE)
(RS-232-C/V.24, 9-position female D-sub connector or 9-position screw-terminal)
Power connection
MD-62 AC
(3-position screw-terminal)
Power connection
MD-62 DC
(2-position screw-terminal)
* MD-62 115V
Connection Power
no. Supply
1 – Voltage
2 + Voltage
Direction Pin Screw CCITT V.24 Description
no. no. Circuit no.
I 3 8 103 TD/Transmitted Data
O 2 7 104 RD/Received Data
I 7 6 105 RTS/Request To Send
O 8 5 106 CTS/Clear To Send
– 5 1 & 9 102 SG/Signal Ground
I = Input O = Output on MD-62
Fibre optic connection
MD-62
TX
RX
TX
RX
MD-62
12 6070-2001
Hints
If any problems occur upon set-up of the MD-62, the following notes may be helpful.
1. Power up the MD-62 and check that
the PWR LED is lit.
2. Check the cable between your RS-232
interface and the RS-232 connection on
the MD-62. The RS-232 interface on
the MD-62 is configured as DCE (Data
Communication Equipment). Most printers, PCs and terminals are set as DTE
(Data Terminal Equipment).
See 3 suggestions of cable configurations on the next side.
How to check whether the equipment is
DTE or DCE:
• Power up the unknown equipment and
ensure that nothing is plugged into the
RS-232 interface. Using a multi-meter,
first measure the voltage on pin 2 of the
connector (male or female) with reference to ground on pin 7 (25 pole
connector) or on pin 5 (9 pole connector, PC standard). Then measure the
voltage on pin 3 in the same way. The
pin with the most negative voltage will
be the output pin and will identify the
device as DCE or DTE.
25 pole connector RS-232-C
• If the most negative voltage is on pin 2:
the device is DTE.
• If the most negative voltage is on pin 3:
the device is DCE.
9 pole connector,PC standard
• If the most negative voltage is on pin 3:
the device is DTE.
• If the most negative voltage is on pin 2:
the device is DCE.
3. The RS-232 cable is correct but it still
does not work. The LEDs may be helpful.
• PWR: The unit has power
• RD: Data received from fibre interface
• TD: Data received from RS-232 interface
• RTS: RTS from RS-232 side
• CTS: Indicates RTS from RS-232 side
on oppsite modem.
4. Test each individual modem. All switches
in OFF state. Make sure that the mainspower socket is disconnected when the
modem lid is off.
A. Equipment required: a terminal or a PC
with terminal program, an RS-232 cable
according to point 2, and a fibre cable.
B. Connect a cable between the modem
and terminal, or PC with a terminal
program. Connect the fibre cable between RX and TX.
C. Press any key on the keyboard. During
keystrokes, the TD and RD LED’s
should flash on the modem, simultaneously, the characters will be echoed on
the monitor.
D. If the fibre cable is removed from one
port only, the TD LED will flash when
a key is pressed, but no characters will
appear on the screen.
Repeat the same test with the second
modem.
5. Testing the modems together.
A. Leave the last tested modem in place,
connected to the terminal or the PC
(modem A).
B. Connect two fibre cables between the
modems RX (modem A) – TX
(modem B) and vice versa.
C. Connect pins 2 and 3 of the RS-232
interface on modem B
(top screw terminal 7, 8).
D. Continue according to point 4.C.
136070-2001
1
MD-62 DCE
1
DTE MD-62 DCEDCE
MD-62 DCE9 pole (PC)
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
20
21
25
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
20
21
25
6070-2001 03.00 Mälartryck AB, Eskilstuna, Sweden
Westermo Teleindustri AB • S-640 40 Stora Sundby, Sweden
Phone +46 16 612 00 Fax +46 16 611 80
E-mail: info@westermo.se • Westermo Web site: www.westermo.se
Westermo Teleindustri AB have distributors in several countries,
contact us for further information.
Westermo Data Communications GmbH
Bruchsaler Straße 18, 68753 Waghäusel
Tel.: +49(0)7254-95400-0 • Fax.:+49(0)7254-95400-9
E-Mail: westermo.germany@t-online.de
Westermo Data Communications Ltd
Solent Business Centre • Millbrook Road West
Millbrook, Southampton • SO15 0HW
Phone: +44(0)2380 704 611 • Fax.:+44(0)2380 702 682
E-Mail: sales@westermo.co.uk
Subsidiaries
Block diagram
RS-232-C/V.24
RTS
S1:1
7
3
2
8
5
0V
PE
5VA
0V
5VB
0V
1) Jumper R1 normally not mounted
R1 1)
High
Low
S2:5
TX
RX
TD
RD
CTS
SG
Isolated
power supply
Modu-
lator
De-
Modu-
lator
Power
supply
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