Connections to Binary Inputs are made through an 8-pos terminal block (A4-TB1). The terminal block is removable to simplify wiring.
The terminal connections are labeled along the edge of the Auxiliary I/O Board next to terminal block (A4-TB1). Each Binary Input is optically isolated and has a polarized pair of terminals. Observe the pos(+) and neg(-) designators when wiring the terminal block.


  1. De-energize and lock out all ac and dc voltages to ATevo.
  2. Allow internal voltages to dissipate, and check with a voltmeter.
  3. Remove safety shield.
  4. Route Binary Input wiring to Auxiliary I/O Board (A4) through an unused enclosure knockout.
  5. Strip each (#22-14 AWG) wire 0.25in / 6.4mm.
  6. Connect wiring (#22-14 AWG) to appropriate terminals on Auxiliary I/O Board (A4-TB1), tightening terminal screws.
  7. Replace safety shield.
  8. Re-energize ATevo.


  • Binary Inputs are configurable for 12Vdc, 24Vdc, 48Vdc, or 130Vdc (factory-default).
  • Terminal block (A4-TB1) is compression type, accepting #22-14 AWG wire.
  • Correct polarization is required.
Last modified: 1 March 2024