Westermo LD-63B DC Manuel utilisateur

Linjedelare, optisk fiber

- RS-422/485

Line sharing device, fibre optic

- RS-422/485

Glasfaser Leitungsteiler

- RS-422/485

INSTALLATIONSANVISNING

INSTALLATION MANUAL

INSTALLATIONS ANLEITUNG

6072-2021

www.westermosales.com

LD-63B AC

LD-63B DC

©

Westermo Teleindustri A B • 2 0 0 0 • Rev. C

Galvanic

Isolation Transient

Protection Balanced

Transmission CE

Approved

10 6072-2021

Specifications LD-63B

Transmission Asynchronous, full/half duplex or simplex

Interface 1 EIA RS-422/RS-485/ CCITT V.11

5-position screw block

Interface 2 4 ST-connectors, see table of power budget

Data rate 500 kbit/s to 4Mbit/s Manchester code*

Indicators Power, TD, RD, TX1, TX2, RX1, RX2

Temperature range 41–122°F, ambienttemperature

Humidity 0–95% RH without condensation

Dimension 2.2x3.9x5 in. (WxHxD)

Weight 0.6 kg

Mounting On 1.4 in. DIN-rail

Power supply alternatives

* For higher data rate, please contact Westermo.

Description LD-63B

The LD-63B is a line splitter for use in multi-drop fiberoptic networks. The LD-63B

allows conversion between RS-422/485 and fiberoptic. LD-63B is specially developed for

Manchester coded protocols with transmission rates over 500 kbit/s. The LD-63B

consists of two F/O channels, each with its separate transmitter and receiver (TX1, TX2,

RX1 and RX2). On the front of the units there are seven LED’s indicating the datatrans-

mission on the channels. The fiberoptic interface is transparent which means that data

received on RX1 is retransmitted on TX2 and data received on RX2 on TX1.

The number of LD-63B in multidrop is limited. See table of ”Maximum number of units”

on page 15.

Model description LD-63B LD-63B LD-63B LD-63B LD-63B

AC 115V AC DC 36–55V DC 110V DC

Power supply 230V AC 115V AC 24V DC 48V DC 110V DC/80V AC

+15/–10% +15/–10% +50/–50% +15/–25% +10/–10%

Frequency 48–62Hz 48–62Hz – – –/48–62Hz

Fuse, F2 100mA S 100mA S 1.6A S 1.6A S 1A T/1A T

.2x.8in. .2x.8 in .2x.8 in .2x.8 in –/–

Littelfuse Littelfuse Littelfuse Littelfuse Wickmann

Power consumption 5VA 5VA 3W 3W 3W/3VA

Overvoltage

protection 430V 220V – – 430V

Isolation 1 500V 1 500V 500V 500V 3 750V

RMS

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116072-2021

Power budget

The LD-63B is developed for Manchester coded protocols and this means that the power

budget will change with the number of preamble bits in the actual protocol. Preamble bits

are sent before the actual data and has the function of synchronise units in the network

(see figure below).

The LD-63B uses the preamble bits for stabilising before receiving data and this means that

the LD-63B will distort the preamble bits used with more than 10%. The diagrams shows the

available power budget at different number of available preamble bits and at different trans-

mission speeds.

Observe that the diagrams state the

minimum guaranteed power budget.

Experience show however that the typical

value is about 4 dBm higher with 820 nm,

about 3,5 dBm higher with 1300 nm and about 6 dBm higher with singel mode.

Also observe that the calculated values applies between two LD-63B units. In larger networks

each fiber optical loop needs to be summated to get the number of used preamble bits.

Example:

Calculation of number of used

preamble bits.

Assume 820 nm units and 1 Mbit/s tranmission rate.

This means that fiberloop 1, which need 6 dB, will use maximum 1 preamble bit

(from diagram).

Fiberloop 2 needs 14 dB and will use maximum 10 preamble bits (from diagram).

This gives a total maximum of 11 preamble bits.

Idle line 3 preamble bits Start sending data

(Manchester coded)

LD-63B

Loop 1

6dB 14dB

Loop 2

LD-63B LD-63B

Connection:

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16

14

12

10

8

6

4

2

00 500 1000 1500 2000 2500 3000 3500 4000 4500

20 bits

preamble

10 bits

preamble

1 bit

preamble

2 bits

preamble

Power budget (dBm)

Transmission speed (kbit/s)

Minimum guaranteed budget 820nm, 62.5/125µm fiber

Minimum guaranteed budget 1300nm, 62.5/125µm fiber

Minimum guaranteed budget single mode, 9/125µm fiber

14

12

10

8

6

4

2

00 500 1000 1500 2000 2500 3000 3500 4000 4500

20 bits

preamble

10 bits

preamble

1 bit

preamble

2 bits

preamble

Power budget (dBm)

Transmission speed (kbit/s)

7

6

5

4

3

2

1

00 500 1000 1500 2000 2500 3000 3500 4000 4500

20 bits

preamble

10 bits

preamble

1 bit

preamble 2 bits

preamble

Power budget (dBm)

Transmission speed (kbit/s)

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136072-2021

LEDs for indication on LD-63B

• PWR: Indicates that the converter has power.

• TD: Indicates that the converter is receiving data on RS-422/485 side.

• RD: Indicates that the converter is sending data on RS-422/485 side.

• Rx1: Indicates received data on fiber channel 1.

• Rx2: Indicates received data on fiber channel 2.

• Tx1: Indicates that the converter is sending data on fiber channel 1 from RS-422/485 side.

• Tx2: Indicates that the converter is sending data on fiber channel 2 from RS-422/485 side.

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 fibercable

The values below can differ depending on quality and manufacturer of the fiber-optic

cable.

Attenuation in connectors Attenuation in splice

0.2–0.4 dB Fusion 0.1 dB

Mecanical 0.2 dB

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Selection of V or Y function

Y

S1

ON

12 3 4 5 6 7 8 9

V

S1

Termination with fail-safe

Termination (2wire)

S2

Termination (4wire)

S2

No termination

S2

Transmitted power channel 1

Low

S2

High

S2

Transmitted power channel 2

Low

S3: 2–4 not used.

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.

V-mode and Y-mode are described on page 11.

S3

High

S3

Switch settings LD-63B

ON

12 3 4

ON

12 3 4

123456789

S2:1-5

S1:1-9

S3:4-1

ON

12 3 4 5

ON

12 3 4 5

Factory settings

S1

ON

12 3 4 5 6 7 8 9

S3

ON

12 3 4

S2

ON

12 3 4 5

Selection of 2- or 4-wire

4-wire

S1

ON

12 3 4 5 6 7 8 9

2-wire

S1

Selection of 2-wire RS-485 or 4-wire RS-422.

S1: 4–9 is not used.

Selection of speed

Over 1 Mbit

S1

Under 1 Mbit

S1

ON

12 3 4 5 6 7 8 9

ON

12 3 4 5

ON

12 3 4 5

ON

12 3 4 5 6 7 8 9

ON

12 3 4 5 6 7 8 9

ON

12 3 4 5 6 7 8 9

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Screw Power

no. supply

L 115**/230V

N AC power

Earth

Connections LD-63B

Line connection

(5-position screw terminal)

Power connection

LD-63B DC

2-position screw-terminal

Direction Connection CCITT V.11

nr. Description

Receiver 1 A’ (R+)

Receiver 2 B’ (R-)

Transmitter 3 A (T+)

Transmitter 4 B (T-)

5 Shield

Connection Power

no. supply

1 – Voltage

2 + Voltage

Power connection

LD-63B AC

3-position screw-terminal

Description V/Y mode

* LD-63B 115V

1 2 3 4 5 LN

LD-63

RS-422/485 POWER

R+

Rx1

Rx2

Tx1

Tx2

R- T+ T-

TD RDPWR

The definations R+/R–,T+/T– can be various between

different manufactures.

LA-01Y

OR

LA-01V

OR

F/O

V-function

channel 1 channel 2

Y-function

F/O

F/O F/O

RS-422/485

Maximum number of units

Transmission speed Number of units

500 kbit/s 16

1 Mbit/s 8

2 Mbit/s 4

4 Mbit/s 2

For additional units please contact Westermo

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16 6072-2021

RS-422/485

Example: Multidrop

Connection of RS-422, RS-485

LD-63B

RX1 RX2

TX2TX1

RX1 RX2

TX2TX1

LD-63B LD-63B

RS-422/485 RS-422/485

RX1 RX2

TX2TX1

1 2 3 4 5 LN

RS-422/485 POWER

R+

Rx2

Tx1

Tx2

R- T+ T- 1 2 3 4 5 LN

RS-422/485 POWER

R+

Rx2

Tx1

Tx2

R- T+ T-

R+

RS-422

equipment

R–

T+ T–

RS-485

equipment

T+ T–

*) The designations A, A’, B, B’ are sometimes use instead of T+, T–, R+, R–.

Despite the standard, different manufacturers name the signals differently.

The first step in fault finding is to reverse the cables (swap T+ with T– and/or

R+ with R–). Please note that this should be done only at one end!

* *

S1:2 ON

NB When a multidrop connection ends with an LD-63B and the fiberpair

is connected on channel 2, the switch S1:2 must be set (Y-function)

Y-funktion

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176072-2021

OWN COMMENTS

.....................................................................................................................................................................................................................

Gross Automation (877) 268-3700 · www.westermosales.com · [email protected]

6072-2021 03.00 Mälartryck AB, Eskilstuna, Sweden

Westermo Teleindustri AB have distributors in several countries,

contact us for further information.

Block diagram

LOGIC

TX2 RX1

Demodulator

High

Low OR

TX1

RX2

RS-422/485

High

Low

Y/V mode switch, S1:2

ORDemodulator Modulator

Modulator

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Westermo LD-63B DC Manuel utilisateur

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