Isolated converter RS232 to RS485 or RS232 to RS422 DAT3580.
GENERAL DESCRIPTION
The RS232 to RS485 isolated converter DAT3580 guarantees a full isolation between power supply, serial line RS-232 and the RS-485 line. It is also avaiable to convert RS232 to RS422
The Isolation removes ground-loop effects, allowing the use of the device even in the heavy environmental conditions.
It is designed to operate either on serial interface RS-422 full-duplex 4 wires or RS485 half-duplex 2 wires, with a baud-rate transmission up to 115.2 Kbps.
The transmission is asynchronous without settings of protocol, data format and baud rate.
On the RS-232 it is not necessary to use the handshake commands (RTS, CTS, etc..) to control the baud rate.
DAT3000 series devices are designed to be easily mounted on DIN rail, optimizing the space encumbrance. Whereas the thermal dissipation allows it, the devices can be mounted side by side, allowing a relevant reduction of space requiring. The connections are made by means of removable screw terminals, to simiplify the handling of the devices.
The DAT3580 is in compliance with the 89/336/EEC directive on the electromagnetic compatibility.
The device is housed in a rough self-extinguishing plastic container which, thanks to its thin profile of 22.5 mm only, allows a high density mounting on EN- 50022 standard DIN rail.
USER INSTRUCTIONS
Before to install the device, please read the “Installation Instruction” section.
The device DAT3580 converts the serial transmission from RS-232 to RS-485 (2 wires) or RS-422 (4 wires) as follows.
The data incoming from the line TX of RS-232 (DB9 connector pin 3) are converted and transmitted to the terminals D-E of RS-485 and RS-422.
The data incoming from the line RX of RS-485 (terminal D and E) or RS-422 (terminal B and C) are converted and transmitted to the terminal RX of RS-232 (DB9 connector pin 2).
The transmission of the signal follows the logic state of every single bit, then there is not necessary to set the protocol, the data format and the baud-rate.
When the transmission line from the RS-232 is off, the RS-485 driver is in the receive condition (high impedance); when the transmission line from the RS-232 goes on, the RS-485 driver switch immediately to the transmission condition (low impedance). The low impedance is kept for about 150 us, then the line returns automatically in high impedance (receiver).
TECHNICAL SPECIFICATIONS
INSTALLATION INSTRUCTIONS
The DAT 3580 device is suitable for fitting to DIN rails in the vertical position.
For optimum operation and long life follow these instructions:
When the devices are installed side by side it may be necessary to separate them by at least 5 mm in the following case:
- If panel temperature exceeds 45°C and high power supply value( > 27Vdc).
Make sure that sufficient air flow is provided for the device avoiding to place raceways or other objects which could obstruct the ventilation slits. Moreover it is suggested to avoid that devices are mounted above appliances generating heat; their ideal place should be in the lower part of the panel.
Install the device in a place without vibrations.
Moreover it is suggested to avoid routing conductors near power signal cables (motors, induction ovens, inverters, etc...) and to use shielded cable for connecting signals.
DIMENSIONS (mm)
CONFIGURATION
ISOLATION STRUCTURE
