The Auxiliary I/O Board (A4) is an optional component, supplied when local communication to and from ATevo is required. Each board is equipped with:

  • Six (6) relays
  • Four (4) generic Binary Inputs
  • Four (4) generic Analog Inputs

When supplied, the Auxiliary I/O Board (A4) is electrically connected to and mounts on the Power Board (A2). The Auxiliary I/O Board (A4) links to the Main Control Board (A1), via serial communications, through the ribbon cable connected from the Power Board (A2).
A GREEN communications LED on the Auxiliary I/O Board (A4) is located adjacent to terminal block (A4-TB2). This LED blinks to indicate active communication between the Aux I/O Board and the Main Board.
All relays on the Auxiliary I/O Board (A4) are ‘failsafe’. If communication is lost between the Main Control Board (A1) and the Auxiliary I/O Board (A4), the relays will switch to the alarm state.

For component details of the Auxiliary I/O Board (A4), refer to standard drawings:

  • JE5253-29 (Style-5054, up to 50Adc, w/options)
  • JE5313-19 (Style-5070, up to 50Adc, w/options)
  • JE5313-29 (Style-5070, 75-100Adc, w/options)
Last modified: 12 September 2023