DAT3590 Repeater/ Isolator for RS485 or RS422.
GENERAL DESCRIPTION
The Repeater isolator module DAT3590 is an isolated repeater between asynchronous serial lines RS485 or RS422 that guarantees a full isolation between power supply and serial line, removing eventual ground-loop effects, allowing the use of the device even in 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 DAT3590 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 DAT3590 transmits the data incoming on the RS-485 (2 wires) or RS-422 (4 wires) in bidirectional mode; the data incoming on the line RX (pins D-E for RS-485 or B-C for RS-422) are isolated and transmitted on the line TX (pins D-E).
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 baudrate.
When the data transmission is off, the RS-485 driver is in the receive condition (high impedance); when the data transmission 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 to keep free the line in case of error.
TECHNICAL SPECIFICATIONS
INSTALLATION INSTRUCTIONS
The DAT 3590 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( > 27 Vdc).
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
