Isolated RS-232/485/422 converter or repeater

Product Features

  • Bidirectional data conversion between RS-232 serial port and RS-485/422 serial port
  • Support RS-485/422 repeater function, combine repeater function And bidirectional data conversion
  • Selects communication parameters automatically, communication distance is up to 3000m (9600bps)
  • Serial port provides 1500W surge protection and 15kV electrostatic protection
  • Support 12~36VDC wide voltage input

DDAM-8520 is a industrial-grade Serial converter with bidirectional conversion between RS-232 to RS-485/422 and also a RS-485/422 repeater. Thus this device can be used for bidirectional data conversion between serial signals like RS-232 to RS-485/422. It can also be used as a repeater for RS-485 and RS-422 transmission. It provides 1 RS-232 serial port and 2 RS-485/422 serial ports. The Serial port has a 1500W surge protection, 15kV electrostatic protection and 3kV photoelectric isolation protection, thus it effectively prevents device from being damaged due to surge or high voltages in noisy enviorenmets.


  • DDAM-8520 ds


Standards EIA RS-232C, RS-485, RS422 standard
RS-232 signal TX, RX, GND
RS-422 signal T+, T-, R+, R-, GND
RS-485 signal D+, D-, GND
Working mode Asynchronism, point to point or multi point, 2 wire half-duplex,4 wire full duplex
Baud rate 300~115200bps, auto test serial signal rate detect signal speed automatically, zero delay time
Flow control Data direction auto-turnaround, no flow control is required
Transfer distance RS-485/422 side:3Km(9600bps)
RS-232 side no less than 5m
Max number of drops 128 nodes
Optical isolation 3000V
Port protect 1500W surge protection,15KV ESD protection
Connector RS-232 side DB9 female
RS-485/422 side 5 bit terminal block
Isolation mode adopt +12V~36VDC input power, provide 3000V isolation
Environment Operating temperature                  -10°C to 60°C
Storage  temperature                    -40°C to 85°C
Humidity                                        5% to 95%(no condensation)
Appearance Dimensions                                    100.0mm×69.0mm×22.0mm
Material                                         Iron(shell)
Color                                             White
Weight                                           200g
Warranty 3 years
Storage temperature -40°C to 85°C
Humidity 5% to 95%(no condensation)
Material Iron(shell)
Color White
Weight 200g
Approvals FCC, CE, RoHS approvals

Ordering info

Available Models

Model No.Model Description
DDAM-8520 Isolated RS-232 to RS485/422 converter or Repeater.
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