A&D > Weighing > AD-8551R
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AD-8551R

RS-232C to RS-485 Converter

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Power supply voltage DC 12 to 24 V + 10 % - 15 %
Power consumption 2 W Max.
Interface RS-485 ×1 (for connecting to control equipment)
RS-232C ×1 (for connecting to weighing devices)
Operating conditions -10ºC to +50ºC Max 85 %RH (no condensation)
External dimensions 35.3 (W)×110.0 (H)×101.3 (D) mm
Accessory RS-485 connector (power clamp wire mount socket )
Mass Approximately 170 g

*RS-485 connecter 3M 35505-6200-A00GF Branch connector 3M 35715-L010-A00AK

  • Multiple balances and scales can be connected to a PLC, HMI and PC
  • Two selectable communication protocols (Modbus-RTU, Command mode)
  • Up to a maximum of 31 sets can be connected to a PLC or PC
  • Din rail mounting type
  • The communication status can always be understood by utilizing the LEDs



    RUN Lit : Power on
    RUN Blinking : Incorrect RS-485 or RS-232C settings
    RXD Blinking : The AD-8551R is receiving data from a balance or scale
    SD Blinking : The AD-8551R is sending data to a PLC or PC
    RD Blinking : The AD-8551R is receiving data from a PLC or PC
Weighing module AD-4212A, AD-4212B, AD-4212C, AD-4212D
Analytical balance BM, HR, HR-A, HR-i, HR-AZ, GH, GR
Precision balance EJ, EJ-B, FX-i , FZ-i, GX, GX-A, GX-K, GF, GF-A, GF-K, GP
Compact balance EK-i, EK-L, EW-i
Scale FG, HV-C, HV-CP, HV-G, HW-C, HW-CP, HW-G
Scale HV-CWP, HW-WP, SC, SE, SW
Counting scale FC-i, HC-i, FS-i

* The AD-8551R can be powered by the AD-4212C, AD-4212D, FX-i, FZ-i, GX-A, GF-A, HR-A, and HR-AZ. A power supply is required when connecting the AD-8551R to other models.
* The AD-8551R can be connected to the AD-4212C and AD-4212D with a standard accessory cable.
Other models require an optional cable.
* Please refer to the instruction manual for details on the connection method.