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Expanded range of serial in-line converters

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THESE small devices from Interworld Electronics convert between RS232 and RS422/485 allowing standard computer serial ports to communicate with RS422 or RS485 devices.

The converters function as an extension of the computer's built-in serial ports, so no software drivers are necessary.

The devices are also compatible with any PC-based operating system. By connecting two serial converters back to back it is possible to extend the distance RS232 equipment can communicate by up to 1.3 kilometres.

Fourteen different converter models are available offering unique features to suit individual requirements.

Features include 4-wire full duplex and/or 2-wire half duplex operation, auto-enabled RS485 control, port-powered and external powered, isolation and surge protection, choice of connector styles and data flow indicator LEDs.

Basic models that support RS422 4-wire full duplex include:

* QT422PP9R - RS232 (DB9) to RS422 (DB9), port powered.

* QT422PP9TB - RS232 (DB9) to RS422 (terminal block), port or external power supply.

* QT422LPCOR - RS232 (DB25) to RS422 (terminal block), port or external power supply.

Basic models that support RS422/485 4-wire full duplex and 2-wire half duplex include:

* QT422LP9R - RS232 (DB9) to RS422/485 (DB9), port powered.

* QT422LP9TB - RS232 (DB9) to RS422/485 (terminal block), port or external power supply.

Auto-enabled RS-485 models include the:

* QT485D9TB - RS232 (DB9) to RS485 (terminal block), 2-wire half duplex, port/external powered.

* QT485SD9R - RS232 (DB9) to RS485 (DB9), 2-wire half duplex, port powered.

* QT485BAT3 - RS232 (DB9) to RS422/485 (terminal block), 4/2-wire full/half duplex, battery/port/external powered.

Optically isolated models include the:

* QT422OISPR - RS232 (DB25) to RS422 (DB25), 4-wire full duplex operation requires external power supply.

* QT485OT9L - RS232 (DB9) to RS422/485 (terminal block), 4/2-wire full/half duplex operation, requires external power supply.

* QT485OTLED - RS232 (DB25) to RS422/485 (terminal block), 4/2-wire full/half duplex operation with LED display, requires external power supply.

* QT485OP - RS422/485 (DB9) to RS422/485 (terminal block) repeater, 4/2-wire full/half duplex, external power supply included.

A range of RS232 line isolators are also available. These devices provide 2500V rms optical isolation between your computer and RS232 devices.

The QT9SPOP2 is a port-powered RS232 isolator with DB9 connectors and the QT232SPHI4 is a port or external powered isolator with DB25 connectors.

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