500-171-R Pinout and drawing

What is the pinout and physical description of the 500-171-R adapter for RS485/422 4 wire and RS485 2 wire?


The 500-171-R, DB25 to Screw terminal adapter is designed for use with the following Lantronix products:

UDS-10, UDS100, UDS1100, SDS1100, SDS1101 and EDS1100

If the Lantronix device will be powered through the screw terminal adapter, the following voltages can be used:

Product DC Voltage range AC Voltage range
UDS-10 9 to 30Vdc N/A
UDS100 9 to 30Vdc 9 to 24Vac
UDS1100 9 to 30Vdc 9 to 24Vac
SDS1100 9 to 30Vdc 9 to 24Vac
SDS1101 9 to 30Vdc 9 to 24Vac

Pinouts for RS485 4 Wire are as follows:

  • Connect TX + to your serial device's RX +.
  • Connect TX - to your serial device's RX -.
  • Connect RX + to your serial device's TX +.
  • Connect RX - to your serial device's TX -.

Pinouts for RS485 2 Wire are as follows:

  • Connect TX + to your serial device's positive line.
  • Connect TX - to your serial device's negative line.
Positive ( + ) = B
Negative ( - ) = A



[Originally Published On: 03/12/2007 09:26 AM]