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External converter RS232/RS485

RS232/RS485It is single-canal, double-sided converter of RS232c serial interface to RS485(with galvanic separation). It uses simple double-wire line (half duplex), without need to shade transfer route. Maximum range is 1200 m. Galvanic separation provides protection from compensatory currents and induced voltage overload. Wired part RS485 is protected from puls voltage overload (software protection). Receiver may be turned on permanently or its control may be set inverse to the transmitter control. End and resting resistance may be realized by short-circuit connectors.

It is supplied from external +12V DC power supply (±10%, with positive pole on middle contact) and it has protection from mis-poling and pulse voltage overload.

Technical specification
Maximum transfer speed 460kb/s
Maximum wire length 1200m
Option of end resistance 120W
Transmitter control RS485 TxD signal
Galvanic separation 1kV
Voltage overload control (software) - RS485 side 600W/1ms
Voltage overload control (software) - power supply 600W/1ms
Connector RS232c D-SUB 9 pin F
Connector RS485 terminal board
Power supply connector plug 1.3mm
Number of canals 1
Supply voltage 12V DC (±10%)
Diagnostic LED supply voltage (red), reception (green)
Shield IP 30
Weight (without power supply) 0.10kg
Input max. 0.8W
Dimensions 58x17x56mm

Standard module configuration
Receiver control RS485 PR1 OFF permanently turned on
Wire holding - pull up PR2 ON pull up set
Wire holding - pull down PR3 ON pull down set
End resistance PR4 ON 120W set


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