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NORVI XN-MAIN – DATASHEET

Updated on October 28, 2026

3 min read

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The NORVI XN-MAIN is an industrial controller built around the ESP32-S3-WROOM-1U-N16R2. It combines Ethernet, RS-485, and LTE Cat 1 cellular connectivity with a 2.0″ touch display, real-time clock, and microSD storage. A 50-pin expansion port allows additional NORVI modules to be added, making it suitable for rugged industrial monitoring and control applications.

Product Features #

  • ESP32-S3-WROOM-1U-N16R2 Main Controller
  • TFT SPI Display with touch input
  • Built-in RS-485 Communication
  • Built-in Ethernet Communication
  • DS3231 Real-Time Clock
  • OTA Management
  • A7672X LTE Cat 1 Cellular Modem
  • USB Programming and Debugging
  • DIN-Rail mount

Applications #

  • Industrial automation and control systems
  • Remote monitoring and telemetry
  • IoT gateways and protocol converters
  • Modbus RTU to Ethernet or MQTT bridging
  • Time-stamped data logging
  • Local HMI and operator panels
  • Building and energy management systems
  • Modular I/O and expansion-based systems

Expansions Supported #

Digital Input Modules
4 x Digital Inputs
8 x Digital Inputs
16 x Digital Inputs		Relay Output Modules
4 x Relay Output
8 x Relay Output		Transistor Output Modules
4 x Transistor Output
8 x Transistor Output
16 x Transistor Output
Analog Input Modules
4 x Analog Inputs 0-10V
4 x Analog Inputs 4-20mA		Analog Output Modules
4 x Analog Outputs 0-10V / 4-20mA		Communication Modules
LoraWAN Module
RS485, RS232 & UART Module
Temperature Input Modules
4 x Temperature Inputs(NTC thermistor(10kΩ )
4 x Temperature Inputs(PT100 & PT1000)
4 x Temperature Inputs( K-Type Thermocouple)
Power & Utility Modules
3 x Current Transformer (Energy)
Product Block Diagram
Product Block Diagram

Main #

Range of ProductNORVI X
Product typeModular Programmable Controller
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
CommunicationWiFI 2.5GHz / Bluetooth
Ethernet
RS-485
Displays and Visual Indicators2.0 inch TFT LCD Display 240*320

Complementary #

Product Unified CodeNORVI XN-MAIN
Product Part NumbersNORVI XN-MAIN

Mechanical Properties #

EnclosureNORVI X
Mounting / Installation MethodDIN RAIL
Terminal TypePush-in terminal
Terminal ArrangementBottom
Length81.00 mm
Height104.00 mm
Width37.50 mm

Environment #

IP degree of protectionIP20
Operating altitude0 – 2000 meters
Operating Temperature– –40 … +85° C (-40…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 #

Rated Supply Voltage (V)24V DC
Current Consumption (mA)90mA – 100mA
Maximum Voltage(V) Input28V DC
Minimum Voltage(V) Input9V DC
Recommended Power Source1A 24V DC

Grid Powered Devices #

Processing #

SOC / MCUESP32-S3-WROOM-1U-N16R2
Flash Memory16MB
ROM384 KB
SRAM512 KB
PSRAM2 MB (Quad-SPI)

Peripherals #

Micro SD Card Support #

Card TypeMicroSD
InterfaceSPI
SD CARD CSIO42
MISOIO13
MOSIIO11
SCLKIO12
SD DetectNOT CONNECTED

Built-in Buttons #

Button 1 PinP0PCA9539APW – P0_2
Button 2 PinP3PCA9539APW – P0_1

Built-in Indicators #

RUN IndicatorP2PCA9539APW – P0_3
ERROR IndicatorP1PCA9539APW – P0_4

LCD TFT #

Display DriverST7789
Display Size2.0 inch
MOSIIO11
MISOIO13
SCLKIO12
DIS_CSIO45
TP RST/ DIS_RSTIO47
DIS_DCIO46
SCL Pin (Touch Screen)IO9
SDA Pin (Touch Screen)IO8
RESET PinNOT CONNECTED

INPUTS and OUTPUTS #

An expansion module from NORVI Controllers should be used to add I/O to the XN-MAIN Module.
Refer products section Link for information on Expansion Modules.
Currently Available Expansion Modules are

4 x Digital Inputs
4 x Relay Outputs
4 x Transistor Outputs
4 x Analog Inputs 0-10V
4 x Analog Inputs 4-20mA
4 x Analog Outputs 0-10V / 4-20mA
8 x Digital Inputs
16 x Digital Inputs
8 x Relay Outputs
16 x Transistor Outputs
4 x Thermocouple
4 x Thermistor
8 x Transistor Outputs
UART – IO
4 x RTD

OTA Management #

  • Cellular handled by the hardware: The whole network connection is built in. There is no network code to write in your firmware.
  • Remote debugging: Watch and troubleshoot the device through a remote serial connection.
  • Remote firmware updates: Update the device with no physical access.
  • Rollback protection: Restore the previous firmware if an update fails.
  • Remote serial logs: View logs remotely for monitoring and troubleshooting.

Communication Channels #

Communication ModeHALF-DUPLEX
TransceiverSN65HVD72
Unit Load1/4
TX PinIO15
RX PinIO16
Terminal Arrangement
RS-485 Communication

A7672X Cellular Communication Specifications #

FeatureDetails
Power supplyPower supply VBAT: 3.4V ~4.2V, Recommended VBAT: 3.8V
Cellular StandardLTE Cat 1
LTE-FDD BandsB1, B3, B5, B8
LTE-TDD BandsB34, B38, B39, B40, B41
GSM Bands900MHz, 1800MHz
Protocol SupportTCP/IP/IPV4/IPV6/Multi-PDP/FTP/FTPS/HTTP/HTTPS/DNS/MQTT
SMS SupportMT, MO, CB, Text, PDU mode

GPIO Map #

GPIOUtilisation
CPUExpansion Port
0BOOT ButtonNC
1SCSN – EthernetIO1
2RSTN – EthernetIO2
3––
4INTN – EthernetIO4
5IO5
6IO6
7IO7
8SDASDA
9SCLSCL
10IO10
11MOSIMOSI
12SCLKSCLK
13MISOMISO
14IO14
15RS485 – TXIO15
16RS485 – RXIO16
17TX1
18RX1
19USB – DND_N
20USB – DPD_P
21IO21
35IO11
36IO36
37IO13
38PCA9536 – RESETRST_PCA
39IO39
40IO40
41IO12
42SD CARD – CSNC
45CS – TFT DISPLAYNC
46DC – TFT DISPLAYNC
47RESET – TFT DISPLAYNC
48INTERRUPT – TOUCH PANELNC

Expansion Port #

PIN INDEXPurposeGPIOSOURCE
1MOSIIO11ESP32-S3
2MISOIO13
3SCLKIO12
4GND—-
5SCLIO9
6SDAIO8
7GND—-
8RX1IO18
9TX1IO17
10GND—-
11D+IO20
12D-IO19
13GND—-
14CS1P1_0PCA9539
I2C Address 0x75
15CS2P0_7
16CS3P0_6
17CS4P0_5
18IO1IO1ESP32-S3
19IO2IO2
20IO4IO4
21IO5IO5
22IO6IO6
23IO7IO7
24IO10IO10
25IO11IO35
26IO12IO41
27IO13IO37
28IO14IO14
29RS485_TXIO15
30GND—-
31GND—-
32RS485_RXIO16
33P1_1P1_1PCA9539
I2C Address 0x75
34P1_2P1_2
35IO21IO21ESP32-S3
36GND—-
37GND—-
38P1_3P1_3PCA9539
I2C Address 0x75
39P1_4P1_4
40P1_5P1_5
41IO39IO39ESP32-S3
42IO40IO40
43IO36IO36
44NC—-
45NC—-
46GND—-
475V5V
48GNDGND
4924V24V
5024V24V
Product TypeMCU / PSRAMExpansion CompatibilityNotes
Standard ProductESP32-S3 (N16R2) – PSRAM via QSPIAll expansion modules supported–
Customized ProductESP32-S3 (N16R8) – PSRAM via OPIAll except X-Q4 expansionX-Q4 not supported on this variant

REVISION HISTORY #

Rev.DateChange DescriptionBoard Revision
1.023/10/2026Initial releaseV4
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