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RS232 to RS485 Converter
Model: VRS485
 

VRS485 is a universal RS232 to RS485 interface converter. The power is supplied from the RS232 serial port and the Power Dissipation is less than 10mA.

   
Features:
  • RS485 Half - Duplex mode available
  • ESD Protection: ±15kV - Human Body Model
  • Surge Protection:1,500W
  • Slew-Rate Limited for Error-Free Data Transmission
  • Allows up to 32 or 128 (you need order) Transceivers on the Bus
  • ADDC - Auto Data Direction Control
 
Application Diagram:

Pin Description:

RS232 Side (DB9 Female)
PIN NAME FUNCTION
2 RD Receiver Data from DTE
3 TD Transmit Data to DTE
5 GND Ground
 
RS485 Side (Terminal Block)
NAME FUNCTION
485- a) '–' TXD- / RXD- aka inverting pin
485+ b) '+' TXD+/RXD+ aka non-inverting pin
GND c) Common signal reference ground

Specification:
Model Number
VRS485
Signal Input / Output
RS232 DB9 Female Connector / RS485 Terminal Block
Transmission Media
Twisted Pair or STP
Transmission Speed
300~115, 2KBPS
Transmission Distance
4000ft / 1200m
Data Rate
Up to 115.2Kbps
Operation Temperature
-13°F ~ 158°F / -25°C ~ 70°C
Dimensions W x H x D
3.82” x 1.30” x 0.67” / 97mm x 33mm x 17mm
*Specifications are subject to change without notice.

RoHS
C-41

OKINA USA Cabling Systems and Solutions provides an answer for all your cabling needs. Our complete line of baluns allows you to easily extend your current audio/video/data system up to 1200ft and even up to 8000 ft, with an active balun.

OKINA USA Baluns are perfectly suited for applications such as these:
CCTV Security Systems
CCTV Surveillance Systems
CCTV Cameras
Home Theatre
LCD/CRT Monitors
Televisions
VGA Monitors
DVD Players
PCs (Personal Computers)
Laptops/Notebooks
USB and PS/2 Devices
UTP (Unshielded Twisted Pair Cable)
BNC (Coaxial Cable)

How does a balun work?
Baluns are used to convert between "Balanced and Unbalanced" electrical signals.
Baluns work by transforming the original unbalanced (video/power/data/etc) signal to a balanced frequency used by a different cable, like CAT5 UTP. Not only does this reduce interference, but it also allows you to transmit a signal much longer than the original application would allow. Baluns are always utilized in pairs. One balun is needed to convert the original signal to a new frequency, and another balun is used at the other end to revert to the original frequency.

"Passive" Video Baluns do not require power, and can extend a signal up to 2000ft (B/W)
"Active" Video Baluns require power, but can extend a signal up to 8000ft (B/W)