Westermo LD-34 User Manual

Galvanic

Isolation

4 kanalig RS-232 switch

- RS-232/V.24

4 channel RS-232 switch

- RS-232/V.24

4 Kanal RS-232 Erweiterung

-RS-232/V.24

INSTALLATIONSANVISNING

INSTALLATION MANUAL

INSTALLATIONS ANLEITUNG

6603-2001

www.westermo.se

LD-34 AC

LD-34 DC

©

Westermo Teleindustri AB • 1999 • REV. A

CE

Approved

8 6603-2001

Description LD-34

General

The LD-34 is a 4 channel RS-232 switch. The unit has one input channel that communicates with a selected output channel. A sixth channel called the “Expansion channel” is provided for onward connection to a modem or another unit. All channels are DCE connections. RTS, CTS is available on all channels flow control.

Channel selection is made by external signals on the “Digital in” connector or by

raising the RTS signal line.

The front cover has 9 LED's to indicate the state of the various communications paths.

As with all Westermo products the LD-34 provides a high level of galvanic isolation on the power supply side through transformers and through optocouplers on the inputs. Channel one and the digital inputs are isolated from channel 2-6.

All operating parameters are set-up via DIP switches located under the lid on the top of the unit.

The LD-34 is available in both AC (230V) and DC (12-36V) supply voltage.

Digital In

The Digital Inputs, A0,A1,EN, E1 and COM can be used to select the required output channel. The inputs have a voltage range of 10-30 VDC between A0, A1, EN, E1 and COM, COM is equivalent to 0V (–). It is possible to reverse the polarity, which means COM = 10-30 VDC and the inputs are activated by 0V(-) being applied.

The maximum input voltage on the inputs is 30 VDC at a maximum current of 5mA per input. Switching time when channel is less then 0.1 ms. All digital inputs are galvanic isolated via optocouplers.

RTS control

Raising the RTS signal on channels 2-5 activates this channel. Only one channel can be activated at a time. If two RTS lines have active, the first gets priority.

96603-2001

Specifications LD-34

Transmission Asynchronous, full/half duplex or simplex Interface CCITT V.24

Inputs: 9-position D-sub outputs: 5-position screw block

Isolation AC 3000V, DC 1500V Data rate 0-115,2 kbit/s Power supply 230 V AC +15/–10% 48-62 Hz, 12-36V DC Fuse AC 100mA fast 5x20 mm. DC 1.6 A Indicators PWR, CH2, CH3, CH4, CH5, TD, RD, RTS, CTS Power consumption AC 30 mA, DC 1.5W Temperature range 5-50°C Humidity 0–95% RH, non-condensing Dimension 55x100x128 mm (WxHxD) Weight AC 0.5 kg, DC 0.3 kg Mounting On 35 mm DIN-rail

LEDs for indication on LD-34

• PWR Indicates that the unit has power

• CH2 Indicates that channel 2 is selected channel

• CH3 Indicates that channel 3 is selected channel

• CH4 Indicates that channel 4 is selected channel

• CH5 Indicates that channel 5 is selected channel

• TD Indicates that the unit is receiving data through channel 1

• RD Indicates that the unit is sending data through channel 1

• RTS Indicates that the unit is receiving RTS signal through channel 1

• CTS Indicates that the unit is sending CTS signal through channel 1

10 6603-2001

Switch settings LD-34

Digital in

Activation control

S1

RTS selection of channel 2-5

S2:1-6 (No function)

S1

Selecting channel with Digital in (A0, A1)

Factory settings

S1 S2

A0 A1 EN E1 Ch 2 Ch 3 Ch 4 Ch 5 Ch 6

0 0 0 0 data – – – data 1 0 0 0 – data – – data 0 1 0 0 – – data – data 1 1 0 0 – – – data data 0 0 1 0 – – – – data 1 0 1 0 – – – – data 0 1 1 0 – – – – data

1 1 1 0 – – – – data X X 0 1 data data data data data X X 1 1 – – – – data

X = donÕt care

Note: Unconnected input is Ô0Õ

ON

12345678

ON

12345678

ON

12345678

ON

123456

116603-2001

Connections LD-34



123451

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15

2345

NC 1 109 DCD/Data Carrier Detect

O 2 104 RD/Received Data

I 3 103 TD/Transmitted Data

NC 4 108/2 DTR/Data Terminal Ready

– 5 102 SG/Signal Ground

NC 6 107 DSR/Data Set Ready

I 7 105 RTS/Request To Send

O 8 106 CTS/Clear To Send

NC 9

Signal Description

Terminal connection

RS-232 (Channel 1)

RS-232 (Channel 2-6)

I = input O = output NC = not connected

Direction

DCE

Connection 9-pin D-Sub

CCITT V.24

Description

I 5 10 15 TD/Transmitted Data

O 4 9 14 RD/Received Data

I 3 8 13 RTS/Request To Send

O 2 7 12 CTS/Clear To Send

– 1 6 11 GND/Signal Ground

Signal Description

Direction

Channel 2–4

Pin No.

Channel 5

Pin No.

Channel 6

Pin No.

Not used

12 6603-2001

Example: How to connect

Power connection LD-34 DC

2-position screw-terminal

Connection Power

supply

– – Voltage

+ + Voltage

Screw Power

supply

L 230V

N AC power

Earth

Power connection LD-34 AC

3-position screw-terminal



TD RD RTS CTS SG

RS-232 Equipment DCE

Not used

TD RD RTS CTS SG

RS-232 Equipment DCE

SG CTS RTS

RD

TD

RS-232 Equipment DTE

EXPANSION

SG CTS RTS

RD

TD

RS-232 Equipment DTE

Channel 4

Channel 2

Channel 3

Channel 5

GND

CTS

RTS

RD

TD

GND

CTS

RTS

RD

TD

RD

TD

CTS

RTS

GND

RD

TD

CTS

RTS

GND

CTS RTS

RD TD

A0 A1 EN

E1

COM

CPU

Digital out

Com Port

136603-2001

OWN COMMENTS

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

6603-2001 01.99 TunaTryck 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)1703-704 611 • Fax.:+44(0)1703 702 682 E-Mail: sales@westermo.co.uk

Subsidiaries

Block diagram

A0

A1

EN

E1

COM

RS-232 RS-232

CH 6 (exp.)

PAL

CH 2

CH 3

CH 4

CH 5

CH 1

Westermo LD-34 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual