April 17, 2011


ZCONV485 is an efficient and compact RS232 – RS485 self-powered converter.

It connects directly to the RS232 port using the classic 9-pin SUBD connector. From this it derives also the current necessary for its operation.

On the opposite side there are 6 terminals with a 5.08 mm pitch to which the RS485 communication cable is to be connected. It is also possible to supply the converter directly from the bus by applying a voltage between 9 and 24 Vdc.

Technical characteristics, RS232 side:

  • Data Rate up to 120 kpbs
  • ESD +/-15 kV (HBM – Human Body Model)
  • Meets or Exceeds the Requirements of TIA/EIA-232-F and ITU v.28 Standards
  • Max supply current 15 mA

Technical characteristics, RS485 side:

  • Maximum bumber of end node: 32
  • Low Supply Current, 5 mA Max
  • Meets or Exceeds the Standard Requirements of ANSI RS-485 and ISO 8482:1987(E)
  • Common-Mode Voltage Range of −7 V to 12 V
  • Positive- and Negative-Output Current Limiting
  • Driver Thermal Shutdown Protection

The following table shows the pinouts of the two connectors.


Power Supply 9 – 24 Vdc
RXD+ / A

RXD- / B

TXD- / Z
TXD+ / Y
4, 7

Power Supply

More information? Please use the following form.


This electronic board is based on a  microcontroller PIC18F4431 from Microchip and it acts like a small PLC.
With respect a standard PLC, this is a much more high performance/cost ratio solution.
Its microcontroller is able to control each input and ouput signal faster than a lod-end PLC, just in few microseconds.

The board is equipped with:

  • 16 digital inpunt working at 24 Vdc;
  • 8 digital PNP output – max ouput current 100 mA @ 24 Vdc;
  • each input and each ouput is equipped with a LED to easily see the corresponding state – active high;
  • 1 analog input 0 – 10 Vdc;
  • 1 input for an incremental encoder with A, B and INDX signals decoding;
  • 1 RS232 serial port to communicate with and external device (terminal, PC, bar-code reader etc).

The dimension of the board are: 100 x 160 mm.

The green plastic enclosure is ready for the hooking on the DIN bar.

For more information, please use the following form.