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RS-232 to RS-485 Converter

RS-232 to RS-485 Converter


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Manufacturer: USBGEAR
Barcode: 729440626310
Part Number: US-485C
Warranty: ONE YEAR
In Stock: Yes
Ship Weight: 1 lbs.
COLOR Beige
Size: Adapter
Platform:  
Compatability: 

Item Works with MAC Operating System OS 9.1 or Higher
Item Works with Windows ME Item Works with Windows 2000

Our Price: $24.95
Qty:
Quantity Discount(s)
48 or more: $23.66
99 or more: $21.99
AVAILABLE TO SHIP SAME DAY!
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User Reviews by ReviewGear.com
Product Rating: Product User Rating provided by ReviewGear

Pros: Easy installation, Works with Vista and Windows 7.

CONNECTOR TYPE:
db-9-serial-male.gif  CONNECTOR TYPE db-9-female-1.jpg CONNECTOR TYPE

Product Description


EIA/TIA RS232C standard and RS485 standard

This adapter is able to convert an RS-232 signal to an RS-485 balanced differential signal and extend the communication distance up to 0.75 miles.

RS-232 to RS-485 Converter

General Features:

EIA/TIA RS232C standard and RS485 standard Interface RS232 side: DB9 female connector.

Interface RS485 side: DB9 male connector with optional (included) terminal board.

Transmission rate: 300 - 115200bps

Transmission distance: RS485 max. 1200m, RS232 side max. 5m Working mode: Asynchronous, half-duplex, differential transmission Passive - no external power needed

 

This RS232 to RS485 converter is compatible with the RS232C and RS485 standard. It is able to convert RS232 signals to RS485 balanced differential signals and extend the communication distance to 1.2 km. It is a passive converter and doesn't require a external power supply. It uses a particular pump to gain power from the RS232 signals (RTS, DTR, TXD) without initializing the RS232 interface. An internal transceiver circuit automatically controls the direction of the data stream instead of handshake signals. When working in half-duplex mode the circuit keeps the same function under RS485 without any change. The transmission rate of 300 - 115200bps can be applied to point-to-point and point-to-multipoint networks.

Overall features

  • Compatibility: EIA/TIA RS232C standard and RS485 standard.
  • Interface RS232 side: DB9 female connector.
  • Interface RS485 side: DB9 male connector with optional terminal board.
  • Working mode: asynchronous, half-duplex, differential transmission.
  • Transmission rate: 300 - 115200bps
  • Recommended transmission media: twisted pair or shielded twisted pair.
  • Mechanical dimensions: 95mm x 33mm x 17mm
  • Working environment: 0 ~ 70¡ãC, relative humidity 5% - 95%
  • Transmission distance: RS485 max. 1200m, RS232 side max. 5m

RS232C connector definition

 

RS485 connector definition

DB9 pin no.

RS232C singnal

1

DCD

2

RXD

3

TXD

4

DTR

5

GND

6

DSR

7

RTS

8

CTS

9

RI

 

Pin no.

DB9 male

Terminal board

1

D-/B

D+/A

2

D+/A

D-/B

3

-

GND

4

-

+5V ~ +12V

5

GND

-

6

+5V ~ +12V

-

7

-

-

8

-

-

9

-

-

Important Technical Information:
RS232 to RS485 converter



RS-232 to RS-485 Converter

RS-232 to RS-485 Converter  - Image A