12 input 4 output expander
with Modbus

  • 12 DC digital isolated inputs and 4 relay oputputs
  • Multi baud-rate support and input signal indicators
  • Wide power supply 8-36V DC or 8-24V AC

Input/output extender with Modbus RTU interface. It has 12 isolated digital inputs with range up to 30VDC and 4 relay output with 5A 230V range and NO contacts. Extended baud-rate and address configuration to meet advance system requirement. Extended baud-rate and address configuration to meet advance system requirement. By using a DC / DC converter to power relays, the extender can be powered by a wide voltage range.



  • Street lighting electrical panels, road infrastructure panels, machine controllers
  • Controllers of industrial machines and vending machines etc.

Digital inputs12 x opto-isolated digital input up to 30V DC
Outputs4 x NO relay output 5A 230V or 5A 30V DC
Serial interface1 x RS485
Modbus address range1 ~ 255
Baudrate2400, 4800, 9600, 14400, 19200, 28800, 38400, 57600, 115200, 128000
Configuration4 way DIP switch for serial baudrate and 8 way DIP switch for Modbus address
Status indicators12 x input, 4 x output, 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
Dimensions120mm x 90mm x 50mm

Operating system supportAll Modbus masters

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