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IOX Expansion Module

iox module

Customizable I/O interface in DIN-compliant enclosure with optional power metering

Use the IOX to collect, log and visualize IoT data from everyday sensors and meters, communicate with devices over serial interfaces, and control relays and actuators found in building and industrial automation systems. Easily share data with remote clients and cloud applications for alerts, analytics and more.

The IOX is a compact, programmable companion module to SmartServer™ IoT for connecting to industrial devices. It features multiple configurable digital I/Os and serial interfaces for controlling or communicating with devices such as digital sensors, dry contact relays, push buttons, etc. It also features optional power measurement for accurate energy metering

Features and Benefits

Local I/O expansion module for Dialog’s SmartServer IoT

Programmable using IAP/MQ APIs

Configurable digital inputs and outputs 

Isolated RS-485 interface for Modbus RTU

RS-232 interface that can be accessed from SmartServer IoT applications and drivers

USB interface to the SmartServer IoT

Optional high accuracy power metering 

Data read by the IOX is logged in the SmartServer IoT or accessible by remote clients and applications

Push button reset/connect and LED status indicators

DIN 43880 compliant enclosure

5 VDC reference power source can be used to power simple devices

Industrial grade specifications for use in most facilities, factories and infrastructure projects


Hardware and electrical specifications

2MB flash memory

Input power: 12-42VDC 0.25A or 10-30VAC 50/60 Hz 0.23A, or 5VDC when powered by USB

Power LED, Ready LED, I/O LED indicators

Reset and Connect buttons

Temperature range: -20°C to +85°C

IP 20 rating

Form factor: DIN 43880 4TE


USB C 2.0: 1 port for connection to SmartServer IoT

Digital inputs: 8 @ 0-31V; each with 5 configurable ranges

Digital outputs: 6 optically isolated digital outputs with 100mA sink

Relay outputs: 2 relay contacts; each supports up to 277VAC@10A or 30VDC@10A

Power measurement input (Metering model only): Measures 100-277VAC (up to 3 phases) voltage, current and power via external CTs; 0.5% accuracy; screw terminal

RS-485: 1 4-connection screw terminal block for Modbus RTU

RS-232: 1 UART compatible interface

5VDC: 1 reference voltage output, 50mA max current

Digital input modes

Digital level input with optional edge trigger implemented as a dry contact with external voltage source or sourced by I/O expander power output

Frequency input with a range of 1Hz to 20kHz with a minimum resolution of <0.5% collected over configurable interval (1/s to 1/3600s)

Digital output modes

Digital level output implemented with an open drain requiring external pull up

Frequency outputs with minimum range of 1Hz to 20KHz; 0.005Hz minimum resolution

Configurable single pulse output with normally high or normally low output; 0 to 30 day range; 1ms minimum resolution

Configurable pulse width modulated output with a configurable normally high or normally low output; 2ms to 30s period range; minimum resolution of 0.4% of the period

Safety and compliance

CSA/UL 62368-1, EN 62368-1

FCC Part 15 Class B, EN 55032, EN 55024, AS/NZS CISPR 32 Class B


Name Date Version
IOX Expansion Module Datasheet (804.3 KB)
Name Date Version
Brochure: Deliver the Promise of the IoT (3.42 MB)
User guides and manuals
Name Date Version
IOX User Documentation (13.05 KB)

Industrial Edge Computing and LON support are available at