LD485PP | Emmeci Elettronica – Design and manufacture of electronic boards and systems

LD485PP - Push-pull multifunction interface

Drivers


General features

LD485PP - LD485PP

The LD485PP interface was designed to solve problems related to interfacing between sources with line-driver outputs (ex. encoder, drives, ecc.) and system equipped with PNP and NPN inputs.

The line-driver signals often have sufficient amplitudes to correctly control systems (PLC, industrial PC, ecc.) equipped with 0-24Vcc inputs. LD485PP allows to transform the differential signal into one referred to the negative of the power supply and is also able to bring its amplitude to values close to that of the power supply (24Vcc), making the 2 signals compatible.

The LD485PP interface is able to operate a single line-driver line, therefore in the case of use in systems with multiple line-driver lines, must be provided more interfaces (one for each line).

In the schematic below the wiring schematic of the LD485PP interface is shown:

Technical details

DIMENSION (Lenght. x Depht. x H.) 93x28x52mm.
FIXING DIN Guide
CONNECTIONS Screw terminal for cable Ø max.1,5mm
POWER SUPPLY (Vsupply) 18-26Vcc 30mA max.
TYPE OF OUTPUTS push-pull 100mA max. outputs equipped with a current limiting resistor of 100Ω
OUTPUTS VOLTAGE (Vout) 0,5V < Vout < Vsupply – 2,5V @ 20mA
LINE-DRIVER INPUTS FREQUENCY 0 ≤ FIN ≤350KHz
LINE-DRIVER INPUTS VOLTAGE > 12KΩ
LINE-DRIVER INPUTS VOLTAGE (Vin) -7V ≤ Vin ≤ +12V (voltage between A (or B) and – Alim.)
LINE-DRIVER DIFFERENTIAL VOLTAGE (Vin) ±0,2V ≤ Vin ≤ ±12V (voltage between A and B)

F.A.Q.

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