Honeywell 2MLI-D28A-CC-3 Honeywell 2MLI-D28A-CC-1 Honeywell 2MLI-D28A-CC-2 Honeywell 2MLI-D28A-CC-4

The Honeywell 2MLI-D28A-CC Digital Input Module is a high-performance solution designed for large-scale industrial automation systems requiring reliable and high-density discrete signal acquisition. As part of the MasterLogic PLC platform, this module enables efficient monitoring of field devices such as sensors, switches, and alarms.

With its advanced isolation technology and fast response capability, the 2MLI-D28A-CC ensures accurate signal processing even in electrically noisy environments. Its compact yet powerful design allows engineers to maximize I/O capacity while maintaining system stability and flexibility.

Technical Specifications

Parameter	Specification
Model	2MLI-D28A-CC
Module Type	Digital Input Module
Input Channels	64 points
Input Type	DC 24V (Sink/Source)
Rated Input Voltage	24 V DC
Operating Voltage Range	20.4 – 28.8 V DC
Rated Input Current	Approx. 4 mA per point
Input Resistance	Approx. 5.6 kΩ
ON Voltage / Current	≥19 V / ≥3 mA
OFF Voltage / Current	≤11 V / ≤1.7 mA
Response Time	1–100 ms (configurable, default 3 ms)
Isolation Method	Photo-coupler isolation
Isolation Voltage	AC 560 V (RMS)
Current Consumption	Approx. 60 mA
Connection Method	40-pin connector × 2
Operating Temperature	-20°C to +60°C
Storage Temperature	-40°C to +85°C
Dimensions (W × H × D)	22 × 124 × 126 mm
Weight	0.15 kg

Recommended Related Models

Honeywell 2MLI-D28B-CC
Honeywell 2MLI-D24B
Honeywell 2MLQ-RY2A
Honeywell 2MLQ-TR4A
Honeywell 2MLP-ACF1-CC

Popular Honeywell Models

Honeywell 900C75-0460
Honeywell 900G03-0202
Honeywell 900H02-0102
Honeywell 900R12R-0200
Honeywell 900S75-0460

Applications

The 2MLI-D28A-CC module is widely used in industries where large volumes of digital signals must be monitored reliably:

Process automation systems (DCS / PLC)
Oil & gas production and refining
Power generation and substation monitoring
Manufacturing lines and machine control
Safety and alarm monitoring systems

Advantages

High-Density Input Capability
Supports up to 64 digital inputs, reducing module count and saving panel space.
Reliable Signal Isolation
Photo-coupler isolation protects the control system from electrical noise and interference.
Fast and Configurable Response
Adjustable response times enable precise adaptation to different process requirements.
Robust Industrial Performance
Designed to operate consistently in harsh environments with temperature fluctuations and electrical disturbances.
Efficient System Integration
Seamlessly integrates with Honeywell MasterLogic PLC platforms for scalable automation solutions.

Technical FAQs

1. What is the main function of the 2MLI-D28A-CC?
It collects and processes digital input signals from field devices in automation systems.

2. How many input channels are available?
It supports 64 digital input points.

3. What voltage does the module use?
It operates with a 24 V DC input signal.

4. Does it support both sink and source inputs?
Yes, it supports both configurations for flexible wiring.

5. What type of isolation is used?
Photo-coupler isolation ensures electrical separation and signal integrity.

6. Can response time be adjusted?
Yes, response time can be configured between 1 ms and 100 ms.

7. What is the typical application environment?
It is designed for industrial environments such as factories, energy plants, and process industries.

8. How is the module connected externally?
Through dual 40-pin connectors for high-density wiring.

9. Is it suitable for large automation systems?
Yes, its high channel density makes it ideal for large-scale systems.

10. What makes this module reliable?
Its isolation design, stable electrical characteristics, and industrial-grade construction ensure long-term dependable operation.

Look forward to your comments!Comment