Description
Overview
The MLI-DR28U/DC from Honeywell is a DC-powered relay output module designed for the MasterLogic PLC platform. It combines 16 optically isolated digital inputs with 12 relay outputs, delivering flexible control and reliable signal acquisition for industrial automation systems. Built for durability and precision, this module ensures stable operation in demanding environments while supporting advanced communication and control functions.
Technical Specifications
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Model Number: MLI-DR28U/DC
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Manufacturer: Honeywell
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Product Type: Relay Output Module
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System Compatibility: MasterLogic PLC / DCS Systems
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Condition: Brand New
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Weight: 1.5 kg
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Dimensions: 24.5 × 16 × 13.5 cm
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HS Code: 8537101190
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Origin: USA
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Lead Time: In Stock
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Minimum Order Quantity (MOQ): 1
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Status: Active
Electrical and Functional Characteristics
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Power Supply: DC 24 V
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Inputs: 16 digital channels with photo-coupler isolation
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Input Voltage/Current: DC 24 V / 4 mA (7 mA for contacts 00–03)
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Input ON Threshold: ≥ DC 19 V / ≥ 3 mA
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Input OFF Threshold: ≤ DC 6 V / ≤ 1 mA
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Input Resistance: 5.6 kΩ (16 points per COM group)
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Outputs: 12 relay channels for flexible load control
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Voltage Range: DC 20.4–28.8 V operational
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Memory Capacity: 384 kB (32k steps)
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Communication Protocols: FENET and 2SNET supported
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Scan Modes: Repetitive, cyclic, interrupt, constant scan, and direct execution
Functional Highlights
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Provides combined input/output functionality for versatile control.
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Relay outputs support multiple load types for industrial flexibility.
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Optical isolation ensures safe and reliable signal acquisition.
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Large memory capacity supports complex control programs.
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Seamless integration into distributed control networks with FENET and 2SNET.
Application Scenarios
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Manufacturing plants requiring robust relay output control.
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Energy and utility systems with distributed PLC/DCS integration.
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Building automation environments needing reliable input/output modules.
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Process industries requiring precise signal acquisition and flexible load switching.
FAQ
Q: How many inputs and outputs does the MLI-DR28U/DC provide? A: It offers 16 digital inputs and 12 relay outputs.
Q: What communication protocols are supported? A: The module supports FENET and 2SNET for seamless integration.
Q: What is the memory capacity of the module? A: It has 384 kB memory, supporting up to 32k program steps.
Q: How does it compare to MLI-DR30E? A: The MLI-DR28U/DC provides relay outputs with DC power supply, while the MLI-DR30E offers higher input/output density and AC supply compatibility.
