High Voltage 8 Input expander
with Modbus

  • Eight 60-500V AC or DC digital inputs
  • Multi baud-rate support and input signal indicators
  • Wide power supply 8-36V DC or 8-24V AC

Digital input extender with high voltage range from 60V AC up to 500V AC to Modbus RTU. Input also support DC voltage in same voltage range. The power supply range is 8 to 36V and accept DC or AC voltage. Extended baud-rate and address configuration to meet advance system requirement.



  • Street lighting electrical panels, road infrastructure panels
  • Controllers of industrial machines and vending machines
Digital inputs8 x opto-isolated digital inputs 60 to 500V AC or DC
Serial interface1 x RS485
Baudrate2400, 4800, 9600, 14400, 19200, 28800, 38400, 57600, 115200, 128000
Modbus address1 ~ 255
Configuration4 way DIP switch for serial baudrate and 8 way DIP switch for Modbus address
Status indicators8 x input, 2 x serial data, 1 x power, 1 x activity
Other option120 Ohm RS485 termination jumper
Power8-36V DC with reverse polarity protection or 8-24V AC
Operating temperature-10°C to 75°C
HousingPVC DIN rail mount
Dimensions80mm x 90mm x 50mm
Operating system supportAll Modbus masters
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AMB-8I      EnquiryBuy now
  • Online documentation
    The documentation page provides detailed product specifications and complete instructions for use. Please read it before using the product.