RS232 to RS485 / RS422 Converter


RS232 to RS485 / RS422 Converter

  • The CONV – 485 M converts the RS 232 Serial Port Signals to RS 485 (or RS 422) signals for long distance driving, and for interfacing devices supporting RS 485 or RS 422 ports.
  • CONV – 485 M is available as an External Standalone Unit enclosed in a plastic casing, which takes power from the supplied Power Adaptor.
  • The Converter is populated with Surface Mount Components for good reliability and to reduce the size. At the same time, it is equipped with powerful and reliable Isolation to Data signals and Protection to Serial Port from any high voltage (1500 VA) appearing in RS 485 side.

Features & Specifications

Serial Interface
Interface RS 232, RS 485, RS 422
Connectors 9 Pin D-Type for RS 232, 5 way screw terminal for RS 485 and RS 422
RS 485
Maximum number of drivers 256
Maximum number of receivers 256
Maximum cable length (RS 485) 1220 m
Maximum cable length (RS 232) 15 m
Signal Isolation Provides optical Isolation to serial port signals
Power Isolation >3000V Isolation between the RS 485 and RS 232
Baud Rate 300 to 115200 baud. Can support higher speed for shorter distances
Indicators (LED)
Power (Red) Remains on when the unit receives power indicating that the unit is functional and ready to send/receive data
TxD (Yellow) Lights up when there is data to be transferred from RS 485 side to Serial & is OFF when there is no data transfer activity
RxD (Green) Lights up whenever there is any incoming data from the Serial to RS 485 side. Remains OFF when there is no activity.
Input External adaptor with 5V DC at 300mA
Operating 0°C to 70°C
Storage -40°C to 85°C
Dimensions (L x W x H) 72mm(L) x 43mm(W) x 21mm(H)
Weight 40g
Warranty Period 12 Months
Component Used Complies with ANSI/TIA/EIA-485-A-98 and ISO 8482:1987 (E), UL 1577


  • Computer and Automation Systems
  • Control Lighting and other systems
  • Control pan tilt zoom cameras
  • Building Automation
  • Control video surveillance systems.
  • Interconnect security control panels and access control card readers
  • Connecting cameras, scales, meters and scanner

Ordering Informaiton

Model Number Description
CONV 485 – M RS 232 to RS 485 / RS 422 Converter