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NORVI X-DI4 – DATASHEET

Last Updated: November 21, 2025

Introduction #

The NORVI X-DI4 is an industrial-grade digital input expansion module designed to seamlessly integrate with the NORVI X Modular Controller. It provides four optically isolated and protected 24 V DC digital inputs, enabling reliable interfacing with sensors, switches, and other field devices used in industrial automation and monitoring systems.

The DI4 variant directly connects its inputs to the host CPU’s GPIO, offering high-speed signal capture suitable for PWM, pulse-train, and encoder inputs. Its design ensures noise immunity, galvanic isolation, and compatibility with both sourcing (PNP) and sinking (NPN) sensor types.

Product Features #

  • 4 × Optically Isolated 24 V Digital Inputs
  • Direct GPIO Link to Host CPU (for high-speed signal acquisition)
  • Supports fast inputs such as PWM, pulse trains & encoders
  • Exposed positive and ground terminals for each input — connect any sensor type
  • DIN-rail mountable industrial enclosure
  • Status indicators for each input

Applications #

  • Industrial switch and sensor interfacing
  • Counter and encoder signal reading
  • Pulse input measurement and frequency monitoring
  • Fast digital signal capture from machines or process lines

Product Block Diagram #

Technical Information #

Main #

Range of ProductNORVI X
Product typeExpansion Module for NORVI X Series
CertificationsEN 61131-2:2007
EN 61010-1:2010+A1:2019
EN IEC 61010-2-201:2018
2014/30/EU- Electromagnetic Compatibility (EMC)
Annex III, Part B, Module C
Rated supply voltage24V DC

Complementary #

Product Part NumbersNORVI X-DI4

Mechanical Properties #

EnclosureNORVI X-N1
Mounting / Installation MethodDIN RAIL
Terminal TypePush-in terminal
Terminal ArrangementFront
Length81.00 mm
Height104.00 mm
Width23.50 mm

Environment #

IP degree of protectionIP20
Operating altitude0 – 2000 meters
Operating Temperature–10 … +85° C (14…185 °F)
Storage altitude0 – 3000 meters
Shock resistance15 gn for 11ms
Resistance to electrostatic discharge4kV on contact
8kV on air
Resistance to electromagnetic fields10 V/m (80 MHz …… 1GHz)
3 V/m (1.4 MHz …… 2 GHz)
1 V/m (2 MHz …… 3 GHz)

Electrical Characteristics #

Grid Powered Devices

Rated Supply Voltage (V)24V DC
Current Consumption (mA)80mA @ 24VDC

I/O Specifications #

ParameterSpecification
Number of Inputs4 Digital Inputs
Input TypeIsolated 24 V DC (Sinking / Sourcing Selectable)
Isolation Voltage>1500 Vrms (optical isolation from CPU)
Input Voltage Range0 – 30 V DC
Logic Low (OFF)< 5 V DC
Logic High (ON)15 V DC
Input ImpedanceApprox. 3.3 kΩ
Input Current~ 7 mA @ 24 V DC
Switching FrequencyUp to 5 kHz (fast input mode)
ProtectionOver-voltage, Reverse Polarity, ESD Protected
Isolation TypeOpto-coupler isolation per channel
Interface to CPUNORVI X Expansion Port (Direct GPIO)
Status Indicators4 × LED Input Indicators
Power Supply24 V DC (shared with CPU via expansion port)
Communication BusDirect GPIO / Internal Expansion Bus
Connector TypePush-in Terminal Block

Terminal Configuration #

TerminalDescription
DI1 +Digital Input 1 Positive
DI1 –Digital Input 1 Ground
DI2 +Digital Input 2 Positive
DI2 –Digital Input 2 Ground
DI3 +Digital Input 3 Positive
DI3 –Digital Input 3 Ground
DI4 +Digital Input 4 Positive
DI4 –Digital Input 4 Ground
24 V DCPower Supply Input
GNDPower Ground

GPIO Utilization #

UtilizationConnection to CPU
Digital Input 1IO5
Digital Input 2IO6
Digital Input 3IO7
Digital Input 4IO10

Expansion Port #

Utilized GPIO Connections are highlighted in Yellow. They cannot be used for any other purpose with this module connected.

PIN INDEXPurposeGPIOSOURCE
1MOSIIO35ESP32-S3
2MISOIO37ESP32-S3
3SCLKIO36ESP32-S3
4SCLIO9ESP32-S3
5SDAIO8ESP32-S3
6RX1IO18ESP32-S3
7TX1IO17ESP32-S3
8P1_2ESP32-S3
9P1_1ESP32-S3
10GND
11GND
12CS1P1_0PCA9539
I2C Address 0x75
13CS2P0_7PCA9539
I2C Address 0x75
14CS3P0_6PCA9539
I2C Address 0x75
15CS4P0_5PCA9539
I2C Address 0x75
16IO1IO1ESP32-S3
17IO2IO2ESP32-S3
18IO4IO4ESP32-S3
19IO5IO5ESP32-S3
20IO6IO6ESP32-S3
21IO7IO7ESP32-S3
22IO10IO10ESP32-S3
23IO11IO11ESP32-S3
24IO12IO12ESP32-S3
25IO13IO13ESP32-S3
26IO14IO14ESP32-S3
27IO15IO15ESP32-S3
28IO16IO16ESP32-S3
29P1_1P1_1PCA9539
I2C Address 0x75
30P1_2P1_2PCA9539
I2C Address 0x75
31IO21IO21ESP32-S3
32P1_3P1_3PCA9539
I2C Address 0x75
33P1_4P1_4PCA9539
I2C Address 0x75
34P1_5P1_5PCA9539
I2C Address 0x75
35IO39IO39ESP32-S3
36IO40IO40ESP32-S3
375V5V
38GNDGND
39GNDGND
4024V24V