Description
Passive RS232 to RS485 Converter Connector Adapter DB9 Data Transmitter Half-duplex 232 to 485 Bidirectional Converter
Product Description
The converter of the bidirectional interface between RS232/RS485 converters is used between main control machines. The main control machine and the microcontroller or peripherals form a point-to-point, point-to-multipoint remote multi-machine communication network to realize multiple machines. Response communication communication is widely used in industrial automation control systems, all-in-one cards, access control systems, parking systems, self-service banking systems, bus toll systems, canteen sales systems, company employee attendance management systems, highway toll gate systems, etc. The RS232/RS485 converter can convert the TXD and RXD signals of the RS-232 serial port into two-balanced half-duplex RS-485 signals. Without external power supply, you can steal electricity directly from the 3 pin of the RS-232 port. At the same time, the 7 pin is requested to send (RTS), and the 4 pin data terminal is ready (DTR) to provide auxiliary power to RS232/RS485. Automatic flow control saves you Reset, the hardware and installation software are very simple to use.
Feature
RS-232C data interface fully compatible with PC, RS-485 interface has DB9 connector and four-position terminal block optional Send data (TXD) automatic flow control, zero delay design Power supply mode: high-efficiency serial port power stealing technology, no external power supply, true three-wire (TD, RD, GND) communication
Application field
Point-to-point, point-to-multipoint communication Industrial distribution system, industrial control automation Road traffic control automation Closed circuit monitoring Security system Smart card, attendance and access control system
Specification
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1
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Serial port characteristics: The interface is compatible with EIA/TIA's RS-232C and RS-485 standards.
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2
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Electrical interface: DB9 hole type side interface on RS-232 end, DB9 needle type connector on RS-485 end, with wiring post.
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3
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Working mode: asynchronous half-duplex.
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4
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Transmission medium: ordinary wire, twisted pair or shielded wire.
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5
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Transmission rate: 300~115200bps.
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6
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Transmission distance: 1-15 meters (RS-232 end) 1200 meters (RS-485 end).
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7
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Communication protocol: transparent.
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8
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Working environment: -10℃ to 85℃ relative humidity is 5% to 95%.
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9
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Signal: RS-232: TXD, RXD, RTS, CTS, DTR, DSR, DCD, GND; RS-485: A (Date+), B (Date-), GND.
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Details Images