Brand:Honeywell DCS Item No.:2MLI-A21C Product Origin:USA Product Dimensions:120 x 110 x 25 mm Product Weight:0.13 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-A21C Digital Input Module is an industrial-grade input module designed for reliable acquisition of AC digital signals in automation and process control systems. It plays a key role in Honeywell MasterLogic PLC architectures by converting field device status signals into actionable control data.
Technical Specifications
Parameter
Specification
Product Type
Digital Input Module
Series
Honeywell MasterLogic I/O
Input Type
AC Digital Input
Input Channels
8 points
Input Voltage
100–240V AC (typical industrial range)
Isolation
Photo-coupler isolation
Response Time
~15 ms ON / 25 ms OFF
Mounting
Rack-mounted modular system
LED Indicators
Yes (per channel)
Operating Temperature
Industrial standard (-20°C to 60°C)
Dimensions
120 × 110 × 25 mm
Weight
0.13 kg
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Applications
• Industrial PLC-based digital signal acquisition in automation control systems
• Process monitoring in manufacturing production lines and machinery status detection
• Distributed control systems (DCS) for oil, gas, and chemical processing plants
• Power plant auxiliary system monitoring and switch status feedback
• Water treatment and utility automation for field device signal collection
• Machine safety interlock and alarm input processing in control cabinets
• Retrofit integration into Honeywell MasterLogic automation architectures
Key Advantages
• High-density multi-channel digital input design for efficient signal collection
• Opto-isolated input structure improves noise immunity and electrical safety
• Stable operation in electrically harsh industrial environments
• Compact modular form factor reduces cabinet space requirements
• Fast response time enables reliable real-time signal detection
• Seamless compatibility with Honeywell PLC/DCS platforms
• LED status indicators simplify diagnostics and maintenance
Technical FAQs
1. What is the main function of the 2MLI-A21C module?
It is used to collect AC digital input signals from field devices into a Honeywell control system.
2. How many input channels does it support?
It typically supports 8 isolated AC input channels.
3. What is the input voltage range?
It supports industrial AC input levels commonly around 100–240V AC.
4. Is the module isolated?
Yes, it uses photo-coupler isolation for each input channel.
5. Can it be used in DCS systems?
Yes, it is designed for Honeywell MasterLogic and DCS environments.
6. Does it support DC input signals?
This model is primarily for AC inputs; DC versions exist in the same series.
7. How does it indicate input status?
Each channel has LED indicators for real-time status monitoring.
8. Is it suitable for harsh environments?
Yes, it is built for industrial temperature and EMI conditions.
9. Does it require programming?
No direct programming is required; configuration is handled at PLC/DCS level.
10. Can it be hot-swapped?
Depending on system configuration, some MasterLogic racks support module replacement procedures.
