Pulsar INTUR - v1.0 Operating instructions

Brand: Pulsar

Model: INTUR - v1.0

Type: Operating instructions

Interface USB-RS485

v.1.0

CODE: INTUR

Edition: 2 from 19.12.2012

Supersedes the: 1 from 07.09.2012 edition

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CONTENTS

1. GENERAL DESCRIPTION...................................................................................................................3

2. INTERFACE INSTALLATION IN THE OPERATING SYSTEM. .................................................4

3. CONNECTING TO THE RS485 BUS...................................................................................................5

3.1

YSTEM STRUCTURE IN THE

RS485

BUS

................................................................................................................................5

3.2

ONNECTING THE INTERFACE TO THE BUS

.............................................................................................................................5

4. SPECIFICATIONS.................................................................................................................................7

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Features:

• data conversion from the RS485 bus to a computer via a USB port

• galvanic isolation

• easy connection

• power supply from the computer’s USB port

• compliant with the PowerSecurity programming software

• LED indication

• small size

•

warranty – 5 years from the production date

1. General description.

The USB-RS485 ”INTUR” interface enables connecting of the RS485 bus to a PC through a USB port. For

proper operation, the converter does not need an external power source since the power is drawn from the

computer’s USB port. The connection is safe due to a built-in galvanic isolation. The interface is recognised by the

computer’s operating system as a virtual COM port.

Fig. 1. The view of the USB-RS485 interface.

Element

no.

Description

[1] USB port – for connection with a computer

[2]

LEDs – optical indication:

PWR – indication of supply’s voltage

TX – data transmission

RX – receiving data

[3]

Connector of the RS485 bus

A+, B- - RS485 data transmission

SG - signal ground

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2. Interface installation in the operating system.

For proper operation, the USB-RS485 interface requires installing appropriate drivers in the computer’s

operating system.

After plugging into a computer’s free USB port the interface will be automatically detected by the operating

system after which the drivers will be installed.

If the drivers haven’t been installed before, download the instructions and install them accordingly to the

given tips. All the instructions and drivers are available on the chipset’s producer’s website:

http://www.ftdichip.com/Support/Documents/InstallGuides.htm

Drivers necessary for installation are to be downloaded from:

http://www.ftdichip.com/FTDrivers.htm

After installing the drivers into the system, plug the USB-RS485 interface into the computer’s USB port. An

additional COM port will appear (e.g. COM5), linked to the converter through which an access to the RS485 bus is

possible. The assigned COM port can be checked in the window of the Device Manager window (location: START

> Control Panel > System > Hardware > Device Manager).

Fig. 2. The Device Manager window.

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3. Connecting to the RS485 bus.

3.1 System structure in the RS485 bus.

Use a twisted-pair cable as a transmission wire of the bus. The bus shall be of a ”point-to-point” topology,

the ”star” type of topology is to be avoided. If the bus is of a significant length it is recommended to use a shielded

cable that will prevent from errors during communication and lowers the system’s susceptibility to noise and

emission of radio frequency interference. It is also advisable to mount termination resistors at the ends of the bus.

Their resistance ought to be comparable to the impedance specific for the lead in use, i.e. 120 Ohm.

Shown below is a block diagram of an RS485 bus connected to a PSU network of PSBEN series.

Fig. 3. A block diagram of power supplies of PSBEN series connected to the RS485 bus.

The connection with the RS485 bus is through the “RS485” connector. Connect the wires of the RS485

bus to the A+, B- terminals of the connector. They are assigned in the same way and the connection is identical to

the rest of devices (A+ to A+, B- to B-).

3.2 Connecting the interface to the bus.

1) Connect the RS485 wire to the RS485 connector of the interface. Take notice of the A+, B- wires so that

they are connected in the same manner as in other devices, i.e. A+ to A+, B- to B-. In the case of shielded

wires, the shield is to be connected to the SG signal ground terminals.

2) Optionally, mount the 120 Ohm termination resistors at the end of the RS485 bus.

3) Connect the interface to the computer via a USB wire.

4) Run the PowerSecurity program.

Download the “PowerSecurity” program from the following page:

http://www.pulsar.pl/pl/pliki/PowerSecurity.exe

5) From the menu bar choose: Power Supplies > New Power Supply. There will appear a window of

Connection Settings in which all settings are to be adjusted.

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Fig. 4. Connection Settings window.

PSU Description

Name

PSU’s name

The name that is to be assigned individually to each PSU.

Address

1 ÷ 247;

The assigned PSU address of is to by typed in the RS485 bus.

Address assignment procedure is explained it he manual of the RS485-TTL

interface.

Refreshing Period

of View [ms]

100 ÷ 60 000ms;

Parameters refreshing time in the preview window.

CONNECTION

Type

Modbus RTU

Port

Enter the number of the COM port – same as the one assigned in the Device

Manager.

Baud Rate

19 200 bauds

Parity

Even

Response Timeout

[ms]

100 ÷ 60 000ms;

Time of reply from the PSU’s interface.

Delay Between

Pools [ms]

Minimum break between subsequent transmissions.

Number of

retransmission

Number of retransmissions after which the program will report a connection failure.

6) After loading the connection configuration the window with a ”Preview” tab will open. In the top left-hand

corner there is an icon which is to be clicked to make a connection with the PSU. As the connection

has been made, the window will display current parameters of the PSU. They will be automatically updated

according to the previosly set refreshing cycle.

Installation procedure described in the items 5 and 6 is to be followed individually for each PSU

within the RS485 bus.

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Fig. 5. The PSU preview window.

4. Specifications.

Power supply 5V DC from the computer’s USB port

Current consumption Max. 25mA from the computer’s USB port

Transmission’s speed Max. 19200 bauds, with parity check

Galvanic isolation between the

RS485 interface and a USB

1KV(DC), 700V(AC)

LED indication PWR – power’s voltage indication (red LED)

TX – data transmission (yellow LED)

RX – receiving data (green LED)

Compliance of the USB interface USB 1.1

USB 2.0 (Full Speed)

Length of the USB wire 1,7m

Protection grade IP20

Operating conditions Temperature -10

C ÷ 40

Relative humidity 20%...90%

Dimensions (LxWxH) 100 x 48 x 40 [mm]

Net/gross weight 0,14kg / 0,24kg

Storage temperature -20ºC...+60ºC

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Pulsar K.Bogusz Sp.j.

Siedlec 150, 32-744 Łapczyca, Polska

Tel. (+48) 14-610-19-40, Fax. (+48) 14-610-19-50

e-mail: [email protected], [email protected]

http:// www.pulsar.pl, www.zasilacze.pl

WEEE

MARKING

According to the EU WEE Directive – It is required not to dispose of electric or electronic waste as unsorted municipal waste and to collect

such WEEE separately.

WARRANTY

5 years counted from the device’s production date.

THE WARRANTY IS VALID only upon presentation

of the item’s proof of purchase.

Pulsar INTUR - v1.0 Operating instructions

Pulsar INTUR - v1.0 Operating instructions

Pulsar INTUR - v1.0 Operating instructions

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