Description

CONVERTERTER/REPEATER RS485/RS232 INTERFACE

DESCRIPTION OF CONVERTERTER/REPEATER RS485/RS232 INTERFACE

The PD51 converter is a digital device destined to convert the RS-232 interface into the industrial interface RS-485. It enables the increase of the RS-485 bus range and the number of devices in the network with a RS-485 bus. It ensures the automatic steering of the data flow direction. The RS-232 interface is commonly accepted but since it has a limited range and restricted working possibilities, it is not used in industrial data  transmission systems. In almost automation systems and advanced control systems, the RS-485 interface is used because it has not such limitations and utilizes the differential procedure for data transmission, what is its main feature.

Owing to the use of two RS-485 interfaces galvanically separated in the PD51 converter/repeater, for the counteraction to their mutual influences, it can be also used as a repeater of industrial networks what increases the distance of transmitted information.

This converter/repeater can be applied:

• to connect a PC computer with industrial networks,
• in applications in which it is necessary to use a PC computer with a visualisation program servicing devices equipped with an RS-485 interface,
• in side-lines requiring the automatic control of the RS-485 interface transmitter,
• voltage supply: 7…35V d.c.; 20…40 V a.c/d.c.; 85…253 V a.c./d.c.,