diff --git a/content/hardware/07.opta/opta-family/opta-digital-exp/datasheet/datasheet.md b/content/hardware/07.opta/opta-family/opta-digital-exp/datasheet/datasheet.md
index f30dbb3afa..6c7129e189 100644
--- a/content/hardware/07.opta/opta-family/opta-digital-exp/datasheet/datasheet.md
+++ b/content/hardware/07.opta/opta-family/opta-digital-exp/datasheet/datasheet.md
@@ -62,12 +62,12 @@ Arduino Opta® Expansion is designed for industrial standard machinery control a
 ***The inputs are marked on plastic as DGT/0-10 V to maintain uniformity with the main Opta module and as conventionally the majority of industrial analog sensors work in the 0-10 V range.***
 
 #### Digital Inputs
-| Characteristics                   | Details                                |
-|-----------------------------------|----------------------------------------|
-| Digital Input voltage             | 0...24 V                               |
-| Digital Input voltage logic level | VIL Max: 4 VDC. VHL Min: 5.9 VDC       |
-| Digital Input current             | 4.12 mA at 24 V, 2.05 mA at 10 V       |
-| Digital Input frequency           | 300 Hz                                 |
+| Characteristics                   | Details                                                                   |
+|-----------------------------------|---------------------------------------------------------------------------|
+| Digital Input voltage             | 0...24 V                                                                  |
+| Digital Input voltage logic level | Voltage Input Low (VIL) Max: 4 VDC. Voltage Input High (VIH) Min: 5.9 VDC |
+| Digital Input current             | 4.12 mA at 24 V, 2.05 mA at 10 V                                          |
+| Digital Input frequency           | 300 Hz                                                                    |
 
 ***The expansion digital inputs are compatible with 0-10 V and 0-24 V digital sensors.***
 
@@ -296,6 +296,7 @@ This device complies with part 15 of the FCC Rules. Operation is subject to the
 
 | Date       | **Revision** | **Changes**                          |
 |------------|--------------|--------------------------------------|
+| 02/12/2024 | 5            | Digital input specification update   |
 | 24/09/2024 | 4            | Expansion port updates               |
 | 24/09/2024 | 3            | SSR operating current update         |
 | 03/09/2024 | 2            | Cloud Editor updated from Web Editor |
diff --git a/content/hardware/07.opta/opta-family/opta-digital-exp/tech-specs.yml b/content/hardware/07.opta/opta-family/opta-digital-exp/tech-specs.yml
index 5c2bf5fabf..75400a9810 100644
--- a/content/hardware/07.opta/opta-family/opta-digital-exp/tech-specs.yml
+++ b/content/hardware/07.opta/opta-family/opta-digital-exp/tech-specs.yml
@@ -9,8 +9,8 @@ Maximum Supported Expansion Modules: 5
 Input:
   Configurable digital / analog input: 16
   Digital Operational Range: 0-24 V
-  Digital VIL Max: 4 V
-  Digital VIH Min: 5.9 V
+  Digital Voltage Input Low (VIL) Max: 4 V
+  Digital Voltage Input High (VIH) Min: 5.9 V
   Analog Operational Range: 0-24 V
   Analog Resolution: 14 bit
 Relays:
diff --git a/content/hardware/07.opta/opta-family/opta/datasheet/datasheet.md b/content/hardware/07.opta/opta-family/opta/datasheet/datasheet.md
index 0bc45b921a..9a1745812e 100644
--- a/content/hardware/07.opta/opta-family/opta/datasheet/datasheet.md
+++ b/content/hardware/07.opta/opta-family/opta/datasheet/datasheet.md
@@ -328,7 +328,7 @@ Arduino Opta® is designed for industrial standard machinery control as a PLC wi
         </tr>
         <tr>
             <td style="vertical-align: top;">Digital Input voltage logic level</td>
-            <td>VIL Max: 4.46 VDC. VHL Min: 6.6 VDC</td>
+            <td>Voltage Input Low (VIL) Maximum: 4.46 VDC. Voltage Input High (VIH) Minimum: 6.6 VDC</td>
         </tr>
         <tr>
             <td style="vertical-align: top;">Digital Input current</td>
@@ -807,6 +807,7 @@ Cet appareil numérique de la classe A est conforme à la norme NMB-003 du Canad
 
 |  **Date**  | **Revision** |             **Changes**              |
 |:----------:|:------------:|:------------------------------------:|
+| 02/12/2024 |      9       |  Digital input specification update  |
 | 24/09/2024 |      8       |        Expansion port updates        |
 | 11/09/2024 |      7       |      ICES certification updates      |
 | 03/09/2024 |      6       | Cloud Editor updated from Web Editor |
diff --git a/content/hardware/07.opta/opta-family/opta/tech-specs.yml b/content/hardware/07.opta/opta-family/opta/tech-specs.yml
index ec51c660af..0d0c2550e1 100644
--- a/content/hardware/07.opta/opta-family/opta/tech-specs.yml
+++ b/content/hardware/07.opta/opta-family/opta/tech-specs.yml
@@ -10,8 +10,8 @@ Microcontroller:
 Input:
   Configurable digital / analog input: 8
   Digital Operational Range: 0-24 V
-  Digital VIL Max: 4.46 V
-  Digital VIH Min: 6.6 V
+  Digital Voltage Input Low (VIL) Max: 4.46 V
+  Digital Voltage Input High (VIH) Min: 6.6 V
   Analog Operational Range: 0-10 V
 Relays:
   Nº of relays: 4