Brand:Honeywell DCS Item No.:2MLI-D22B Product Origin:USA Product Dimensions:120 x 25 x 110 mm Product Weight:0.12 kg Payment:T/T, Western Union, Credit Card Goods_stock:15 Shipping Port:Xiamen, China Lead Time:1-3 Days Condition:Brand New And Original Warranty:1 Year Certificate:COO
The Honeywell 2MLI-D22B Digital Input Module is a 16-point, 24 V DC source-type input module for the MasterLogic-200 PLC platform. It collects discrete field signals and makes their status available to the controller for equipment monitoring, process logic, and automated operation.
The module features photo-coupler isolation, configurable input response times, and LED status indication. Its 16-point configuration allows multiple digital signals to be collected in a single module, helping organize field wiring within compatible control systems.
For maintenance engineers and system integrators, the 2MLI-D22B can serve as a digital input solution for supported MasterLogic-200 installations. Verify input wiring, field-device compatibility, and controller configuration before installation or replacement.
Technical Specifications
Parameter
Specification
Brand
Honeywell
Model
2MLI-D22B
Product Type
Digital Input Module
PLC Series
MasterLogic-200
Number of Input Points
16
Input Type
24 V DC, source type
Rated Input Voltage
24 V DC
Operating Voltage Range
20.4–28.8 V DC
Rated Input Current
Approximately 4 mA
Input Resistance
Approximately 5.6 kΩ
ON-State Threshold
19 V DC or higher / 3 mA or higher
OFF-State Threshold
11 V DC or lower / 1.7 mA or lower
Response Time
Configurable: 1, 3, 5, 10, 20, 70, or 100 ms
Default Response Time
3 ms
Isolation Method
Photo-coupler
Isolation Voltage
AC 560 V RMS / 3 cycles
Isolation Resistance
10 MΩ or higher
Current Consumption
30 mA
External Connection
18-point terminal block, M3 × 6 screws
Dimensions
120 × 25 × 110 mm
Weight
0.12 kg / 0.26 lb
Recommended Related Models
Honeywell 2MLI-D21A Digital Input Module — An 8-point, 24 V DC input module for applications requiring fewer input channels.
Honeywell 2MLI-D22A Digital Input Module — A 16-point source/sink digital input module for compatible field circuits.
Honeywell 2MLI-D24B Digital Input Module — A 32-point, 24 V DC source-type input module for higher channel density.
Honeywell 2MLQ-RY2A Digital Output Module — A relay output module for compatible digital control applications.
Honeywell 2MLQ-TR2B Digital Output Module — A source-type transistor output module for supported switching applications.
Popular Related Models
Model
Product Description
Honeywell 2MLI-D21A
8-Point Digital Input Module
Honeywell 2MLI-D22A
16-Point Source/Sink Digital Input Module
Honeywell 2MLI-D22B
16-Point Source-Type Digital Input Module
Honeywell 2MLI-D24A
32-Point Source/Sink Digital Input Module
Honeywell 2MLI-D24B
32-Point Source-Type Digital Input Module
Honeywell 2MLQ-RY2A
16-Point Relay Output Module
Honeywell 2MLQ-TR2A
16-Point Sink-Type Transistor Output Module
Honeywell 2MLQ-TR2B
16-Point Source-Type Transistor Output Module
Applications
The Honeywell 2MLI-D22B Digital Input Module is a 16-point, 24 V DC digital input module designed for the Honeywell MasterLogic-200 PLC platform. It receives discrete signals from field devices and transfers their status to the PLC for logic processing, equipment monitoring, and automated control.
This model uses a source-type input configuration, making it suitable for compatible industrial control circuits where reliable digital signal acquisition is required.
Typical applications include:
Machine automation: Monitoring switches, sensors, and equipment status signals.
Production lines: Collecting digital feedback for automated sequences and interlocks.
Process monitoring: Detecting ON/OFF states from compatible field devices.
Industrial equipment control: Providing input information for PLC-based operating logic.
System maintenance: Replacing a compatible digital input module in an existing MasterLogic-200 installation.
Advantages
16 digital input points: Connects multiple field signals through one module.
24 V DC operation: Supports a widely used industrial control voltage.
Source-type input design: Suitable for compatible source-type digital input circuits.
Photo-coupler isolation: Helps isolate field signals from internal module circuitry.
Configurable response time: Allows input response settings to be adjusted through CPU parameters.
LED status indication: Provides visual feedback when an input is active.
Compact modular design: Integrates into compatible MasterLogic-200 PLC systems.
Technical FAQs
Q1: What is the Honeywell 2MLI-D22B used for?
The 2MLI-D22B receives digital signals from compatible 24 V DC field devices and provides their status to a MasterLogic-200 PLC.
Q2: How many input points does the module support?
It supports 16 digital input points, arranged with a common connection for the input group.
Q3: What is the rated input voltage?
The rated input voltage is 24 V DC, with a documented operating range of 20.4–28.8 V DC, provided the specified ripple limit is met.
Q4: What type of input circuit does the 2MLI-D22B use?
It is a source-type digital input module. Confirm field-device output characteristics and wiring polarity before connecting external equipment.
Q5: What is the rated input current?
The rated input current is approximately 4 mA per input point.
Q6: Can the input response time be adjusted?
Yes. The response time can be set to 1, 3, 5, 10, 20, 70, or 100 ms through CPU parameters. The documented default is 3 ms for both OFF-to-ON and ON-to-OFF transitions.
Q7: Does the module provide electrical isolation?
Yes. The module uses photo-coupler isolation. The documented isolation voltage is AC 560 V RMS for three cycles under the specified test conditions.
Q8: How can operators check the status of an input?
The module provides LED status indication. An input's LED illuminates when the corresponding input is ON.
Q9: What should be checked if an input signal is not detected?
Inspect the field device, power supply, wiring polarity, common connection, and terminal contacts. Check the input LED and verify that the signal meets the module's ON-state voltage and current requirements.
Q10: Which module is suitable if more input channels are required?
The Honeywell 2MLI-D24B provides 32 source-type digital input points. Confirm the required input configuration, wiring, and controller compatibility before choosing a higher-capacity module.
