Westermo MA-67 User Manual

Omvandlare, optisk fiber

RS-422/485/V.11

Converter, fibre optic

RS-422/485/V.11

Glasfaser Wandler

RS-422/485/V.11

INSTALLATIONSANVISNING

INSTALLATION MANUAL

INSTALLATIONS ANLEITUNG

6067-2001

www.westermo.se

MA-67

©

Westermo Teleindustri AB • 1998 • REV. A

Galvanic

Isolation

Transient

Protection

Balanced

TransmissionCEApproved

8 6067-2001

Specifications MA-67

Transmission Asynchronous, full/half duplex or simplex
Interface 1 EIA RS-422/RS-485

CCITT V.11, 5-position screw-terminal

Interface 2 ST-connectors, see table of power budget
Surge protection Interface 1: transient protection,

flashover voltage for receiver and transmitter 7V.
Dissipation capability 0.6 kW for 1 ms.

Insulation 1500V rms isolation withstand voltage between

communication line and mains.

Power supply +20V DC ±25% (via PS-02)
Fuse 500 mA fast 5x20
Data rate 2.4 kbit/s up to 1,5 Mbit/s
Indicators Power, TD, RD
Power consumption Max 80 mA at 20V DC
Temperature range 5-50°C, ambient temperature
Humidity 0-95% RH without condesation
Dimension 100x100 mm
Weight 0.4 kg
Mounting I 19” rack RV-01, possible to mount

16 MA-67 in a RV-01

96067-2001

S1

F1

S2

TX

RX

S1 Selection of 2-or 4-wire

Selection of turning time/transmission rate
Selection of bits

S2 Selection of termination

Selection of transmitted power

F1 Fuse

MA-67

RX

RD

TD

PWR

TX

Description MA-67

The MA-67 allows RS-422/485 point to point communication over fibre optic multi
mode or single mode cables, at data rates up to 1.5 Mbit/s. Transmission distances up to
25 km (single mode) can be reached.

The MA-67 is designed to be mounted in the Westermo RV-01 and RV-01A racks.

Up to 16 units can be mounted in one rack.

Three LED’s are provided to indicate TX, RX and power. The fibre optic connection
are mounted on the front of the panel and are of the ST type. All other connections are
via the mother board of the RV-01 rack.

10 6067-2001

Selection of 2- or 4-wire

S1 4-wire

Turning

time

Transmission

rate

ON

123456789

S1 2-wire

ON

123456789

Selection of bits

S1 9

ON

123456789

S1 10

ON

123456789

S1 11

ON

123456789

See 2)

2) For synchronous and other asynchronous protocol.

S1: 2-3 not used

ON

123456789

Turning time/

Transmission rate

ON

123456789

S1 0.4 ms 2400 bit/s

ON

123456789

S1 0.2 ms 4800 bit/s

ON

123456789

S1 0.1 ms 9600 bit/s

ON

123456789

S1 75 µs 14400 bit/s

ON

123456789

S1 50 µs 19200 bit/s

ON

123456789

S1 37 µs 28800 bit/s

ON

123456789

S1 25 µs 38400 bit/s

ON

123456789

S1 16 µs 62500 bit/s

ON

123456789

S1 11 µs 93750 bit/s

ON

123456789

S1 9 µs 115.2 kbit/s

ON

123456789

S1 6 µs 187.5 kbit/s

ON

123456789

S1 3 µs 375 kbit/s

ON

123456789

S1 2 µs 500 kbit/s

ON

123456789

S1 1 µs 1-1.5 Mbit/s

••• •

•• • •

•••

••• •

•••

•••

10 10 10 11 11 119

Supervision table when selecting data bits

7 bits

8 bits

No parity

Parity

1 stop bit

2 stop bits

Number of bits

Factory settings

S1

ON

123456789

S2

ON

12345

116067-2001

Termination with fail-safe 1)

S2

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.

ON

12345

Termination (2-wire)

S2

ON

12345

Termination (4-wire)

S2

ON

12345

No termination

Transmitted power

S2

ON

12345

Low

S2

ON

12345

High

Typical attenuation
in connectors

0.2-0.4 dB

Typical attenuation
in splice

Fusion 0.1 dB
Mechanical 0.2 dB

Power budget

Fibre 820 nm 1300 nm Single mode 820 nm 1300 nm Single mode

Min. values Min. value Min. value Typ. value Typ. value Typ. value

50/125 µm 10.7 dB

62,5/125 µm 14.5 dB 11.6 dB 18.6 dB 15.1 dB

100/140 µm 20 dB

9/125 µm 6.3 dB 12.3 dB

Fibre Attenuation Attenuation Attenuation

at 820 nm at 1300 nm at single mode (1300 nm)
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

Attenuation in fibre cable

The values below can differ depending on quality and manufacturer of the fibre-optic
cable.

”Min. value” states the minimum guaranteed power budget. Experience shows however that the
typical value is in the range of the indicated ”Typ. value”.

12 6067-2001

Line connection

TX

RX

TX

RX

Shield 1)

Equipment with

RS-422/V.11

MA-66, MA-67,

LD-63, MD-62/63

MA-66, MA-67,

LD-63, MD-62/63

= Termination

MA-67

T+
T–
R+
R–

1
2
3
4
5

R– R+ T– T+

R+
R–
T+
T–

TX

RX

TX

RX

Shield 1)

Equipment with

RS-485

= Termination

1) If shielded wire is used, connect shield only one end to avoid ground loop currents.

MA-67

3
4
5

T–/R– T+/R+

T+/R+
T–R–

T+/R+

T–/R–

Direction Connection CCITT V.24

No. Description

Receiver 1 A’ (R+)

Receiver 2 B’ (R–)

Transmitter 3 A (T+)

Transmitter 4 B (T–)

5 Shield

Connections MA-67

Line connection
(5-position screw terminal)

Rear wiew of
RV-01 with
MA-67 mounted.

5 position screw
terminal.
Connection of
RS-422/485

136067-2001

Hints

The MA-67 like other Westermo products MA-42, MD-42, MD-63, LD-64, MA-44,
MD-44, MM-42, MA-49, MA-47, RA-48, RD-48 and LD-63 uses the RS-422/485
interfaces.

RS-422/485 were designed for multidrop applications. When a system is installed it
should form a bus structure. Star shaped networks should never be created, there are
other Westermo products designed to work in star net applications. To correctly install,
an RS-422/485 network should be terminated at the correct points.

The recommendation is to terminate the receiver on the first unit and the final bus unit.
See diagrams under the headline ”Line connection” for details of how this is done with
RS-485 (2 wire) and RS-422 (4 wire).

If any problems do occur on set up of the MA-67, the LEDs will be helpful.

- PWR: The unit has power.

- RD: Data received on the opto interface.

- TD: Data received on the RS-422/485 interface.

6067-2001 11.98 TunaTryck AB, Eskilstuna, Sweden

Westermo Teleindustri AB • S-640 40 Stora Sundby, Sweden

Phone [phone] Fax [phone]

E-mail: [e-mail] • 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.: [phone] • Fax.:[phone]
E-Mail: [e-mail]

Westermo Data Communications Ltd
Solent Business Centre • Millbrook Road West
Millbrook, Southampton • SO15 0HW
Phone: [phone] • Fax.:[phone]
E-Mail: [e-mail]

Subsidiaries

Block diagram

+5V

TX

RX

S2:1

3

4

1

2

S2:2

S2:5

S1:1

S2:3

S2:4

R1 1)

Direction

control

High

Low

Insulated power supply

0V

+5V

0V

PE

0V

+5V

Fuse

0V

1) Jumper R1 normally not mounted

V.11/RS-422

RS-485

Power

supply