PD51 - Converter of RS-232 / RS-485 Interfaces

PD51 – Converter of RS-232 / RS-485 Interfaces

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.

The PD51 converter is produced in two versions:

PD51-A – to be assembled on a rail, with opto-isolation,
PD51-B – as portable, without opto-isolation.

Description

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.,

External dimensions: 22,5 x 120 x 100 mm