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IO-DI16-L – Unitronics 16 digital inputs module (12V)

IO-DI16-L – Unitronics 16 digital inputs module (12V)

Unitronics IO-DI16-L digital input expansion module featuring 16 digital inputs, 12V DC operation, PNP/NPN compatibility and integrated 5kHz high-speed counter functionality.

SKU: IO-DI16-LAlt SKU: IODI16LMPN: IO-DI16-L
Price
List Price £127.75 ex VAT
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£127.75
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Why Choose the Unitronics IO-DI16-L Digital Input Expansion Module?

The Unitronics IO-DI16-L is a compact and dependable digital input expansion module designed to increase the input capacity of compatible Unitronics PLC and OPLC systems. Featuring 16 digital inputs arranged in two groups, the module provides a practical solution for machine builders, OEM manufacturers and automation engineers requiring additional field input connectivity.

The IO-DI16-L is specifically designed for 12V DC digital input applications, making it ideal for machinery and control systems operating on lower voltage control circuits. Supporting both PNP (source) and NPN (sink) wiring configurations, the module offers flexible integration across a wide range of industrial automation projects.

With DIN rail mounting, integrated diagnostics and a built-in high-speed counter/frequency measurement input, the IO-DI16-L delivers reliable performance for monitoring sensors, switches, encoders and pulse-generating devices within automated systems.

Key Advantages

  • Provides 16 additional digital inputs for PLC expansion.
  • Designed specifically for 12V DC control systems.
  • Supports both PNP and NPN input wiring.
  • Includes integrated 5kHz high-speed counter functionality.
  • Compact DIN rail-mounted design conserves panel space.
  • Easy integration with compatible Unitronics controllers.
  • Status LEDs simplify commissioning and troubleshooting.

Key Features

  • Unitronics IO-DI16-L digital input expansion module.
  • 16 digital inputs arranged in two groups.
  • 12V DC nominal input voltage.
  • PNP (source) or NPN (sink) input compatibility.
  • Input #15 supports high-speed counter and frequency measurement.
  • 16-bit counter resolution.
  • 5kHz maximum counting frequency.
  • Communication and input status LEDs.
  • DIN rail or panel mounting options.

Reliable 12V Digital Input Expansion for Industrial Control

The Unitronics IO-DI16-L enables engineers to expand controller input capacity without replacing existing PLC hardware. The module allows connection of additional switches, sensors, limit devices and digital signalling equipment while maintaining seamless communication with compatible Unitronics control systems.

Its built-in high-speed counter capability makes the module suitable for encoder monitoring, pulse counting, frequency measurement and other applications requiring fast digital signal acquisition. The flexibility of PNP and NPN wiring further simplifies installation in diverse automation environments.

Typical Applications

  • Industrial machinery automation.
  • Packaging and assembly equipment.
  • Conveyor systems.
  • Sensor and switch monitoring.
  • OEM control panels.
  • Pulse counting applications.
  • Frequency measurement systems.
  • Manufacturing and production automation.

Technical Specifications

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Number of I/O 16
Product Series Unitronics Vision I/O Expansion
Device Type Digital I/O Module
Digital Inputs 16
Signal Type / Function Digital
IP Rating IP20
Product type Digital input expansion module
Number of inputs 16 digital inputs
Input type PNP (source) or NPN (sink)
Nominal input voltage 12V DC
Input voltage range 10.2-15.6V DC
Input current 6mA @ 12V DC
Response time 10ms typical
High-speed counter Input 15
Counter resolution 16-bit
Maximum frequency 5kHz
Minimum pulse width 80μs
Protection rating IP20 / NEMA 1
Operating temperature 0°C to +50°C
Storage temperature -20°C to +60°C
Relative humidity 5% to 95% non-condensing
Dimensions (W × H × D) 80 × 93 × 60 mm
Weight Approximately 141 g
Mounting type 35mm DIN rail or panel mounting

Frequently Asked Questions

What is the Unitronics IO-DI16-L used for?

The IO-DI16-L is a digital input expansion module that adds 16 digital inputs to compatible Unitronics PLC and OPLC systems.

What is the difference between the IO-DI16 and IO-DI16-L?

The primary difference is the input voltage. The IO-DI16 operates at 24V DC, while the IO-DI16-L is designed for 12V DC applications.

Does the IO-DI16-L support both PNP and NPN inputs?

Yes, the module supports both PNP (source) and NPN (sink) digital input configurations.

Does the module include a high-speed counter?

Yes, Input 15 can function as a 16-bit high-speed counter or frequency measurement input with a maximum frequency of 5kHz.

How is the IO-DI16-L installed?

The module can be mounted directly onto a 35mm DIN rail or secured to a panel using screws.

Trusted by Automation Engineers Worldwide

Unitronics expansion modules are widely used throughout industrial automation systems where dependable digital signal acquisition, scalable PLC expansion and long-term reliability are critical for machine performance.

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At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.

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We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products. 

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