# Digital Inputs

The fifth selection at the bottom of the page is another I/O module, allowing for 16 digital inputs.

<figure><img src="/files/duzB8SYq8aLirjG2Ovw8" alt=""><figcaption></figcaption></figure>

## 16 Digital Inputs

<table><thead><tr><th width="111">I/O</th><th width="148">Name</th><th>Description</th></tr></thead><tbody><tr><td>Ia.0</td><td>High Limit #5 Fault</td><td>Green indicates that the high limit circuit is complete and is functioning properly for burner 5. White indicates that the high limit setpoint has been reached for burner 5, tripping the high limit switch.</td></tr><tr><td>Ia.1</td><td>Fan #5 Motor Starter</td><td>Green indicates that the auxiliary contact for fan 5 motor starter is ON. If white, it is OFF.</td></tr><tr><td>Ia.2</td><td>Air Pressure #5</td><td>Green indicates that air pressure switch for plenum 5 has been activated and the blower for that plenum is generating sufficient pressure. White indicates low or no pressure.</td></tr><tr><td>Ia.3</td><td>Burner #5 On </td><td>A green signal verifies that a flame is present at burner 5. White signifies the absence of flame</td></tr><tr><td>Ia.4</td><td>High Limit #6 Fault</td><td>Green indicates that the high limit circuit is complete and is functioning properly for burner 6. White indicates that the high limit setpoint has been reached for burner 6, tripping the high limit switch.</td></tr><tr><td>Ia.5</td><td>Fan #6 Motor Starter</td><td>Green indicates that the auxiliary contact for fan 6 motor starter is ON. If white, it is OFF.</td></tr><tr><td>Ia.6</td><td>Air Pressure #6</td><td>Green indicates that air pressure switch for plenum 6 has been activated and the blower for that plenum is generating sufficient pressure. White indicates low or no pressure.</td></tr><tr><td>Ia.7</td><td>Burner #6 On </td><td>A green signal verifies that a flame is present at burner 6. White signifies the absence of flame.</td></tr><tr><td>Ib.0</td><td>High Limit #7 Fault</td><td>Green indicates that the high limit circuit is complete and is functioning properly for burner 7. White indicates that the high limit setpoint has been reached for burner 7, tripping the high limit switch.</td></tr><tr><td>Ib.1</td><td>Fan #7 Motor Starter</td><td>Green indicates that the auxiliary contact for fan 7 motor starter is ON. If white, it is OFF.</td></tr><tr><td>Ib.2</td><td>Air Pressure #7 </td><td>Green indicates that air pressure switch for plenum 7 has been activated and the blower for that plenum is generating sufficient pressure. White indicates low or no pressure.</td></tr><tr><td>Ib.3</td><td>Burner #7 On</td><td>A green signal verifies that a flame is present at burner 7. White signifies the absence of flame.</td></tr><tr><td>Ib.4</td><td>High Limit #8 Fault</td><td>Green indicates that the high limit circuit is complete and is functioning properly for burner 8. White indicates that the high limit setpoint has been reached for burner 8, tripping the high limit switch.</td></tr><tr><td>Ib.5</td><td>Fan #8 Motor Starter</td><td>Green indicates that the auxiliary contact for fan 8 motor starter is ON. If white, it is OFF.</td></tr><tr><td>Ib.6</td><td>Air Pressure #8</td><td>Green indicates that air pressure switch for plenum 8 has been activated and the blower for that plenum is generating sufficient pressure. White indicates low or no pressure.</td></tr><tr><td>Ib.7</td><td>Burner #8 On</td><td>A green signal verifies that a flame is present at burner 8. White signifies the absence of flame.</td></tr></tbody></table>


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