Honeywell 2MLF-DC4A Current Output Module
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Technical Specifications
| Parameter | Details |
|---|---|
| Manufacturer | Honeywell |
| Model | 2MLF-DC4A |
| Product Name | Current Output Module |
| Product Series | MasterLogic-200 |
| Product Type | Analog Current Output Module |
| Conversion Function | Digital-to-Analog Conversion |
| Number of Output Channels | 4 Channels |
| Analog Output Signal | DC Current |
| Selectable Output Ranges | 4–20 mA, 0–20 mA |
| Maximum Load Resistance | 600 Ω |
| Maximum Resolution | 1/16,000 per output range |
| Resolution at 4–20 mA | 1.0 μA |
| Resolution at 0–20 mA | 1.25 μA |
| Output Accuracy at 25°C | ±0.2% or less |
| Output Accuracy Across Operating Temperature Range | ±0.3% or less |
| Conversion Speed | 250 μs per channel |
| Maximum Absolute Output | ±24 mA |
| Digital Data Format | Signed 16-bit binary value, 14-bit data |
| Supported Digital Value Formats | Unsigned, Signed, Precise, Percentile |
| Output Range Configuration | Individually configurable for each channel |
| Isolation | Photocoupler isolation between input terminals and PLC power supply; no isolation between channels |
| Terminal Connection | 18-point terminal |
| I/O Points Assignment | 64 fixed points or 16 variable points |
| Internal Current Consumption | 300 mA at 5 V DC |
| External Power Requirement | 24 V DC, 400 mA |
| Dimensions | 113 × 27 × 98 mm |
| Weight | 0.15 kg |
FAQ
Q1: What is the main function of the Honeywell 2MLF-DC4A Current Output Module?
The 2MLF-DC4A is an analog output module designed for Honeywell MasterLogic-200 PLC systems. It converts digital control values from the PLC into proportional DC current signals. These signals can be used to control compatible field devices such as control valves, variable-speed drive references, actuators, and other process equipment that accepts 4–20 mA or 0–20 mA commands.
Q2: How many output channels does the 2MLF-DC4A provide, and can they be configured independently?
The module provides four analog current output channels. Each channel can be configured individually through the applicable PLC program or module parameters. This allows different field devices to use the required current range within the same module. During configuration, verify that the selected range in the PLC program matches the receiving device’s input requirements.
Q3: What current output ranges are supported by this module?
The 2MLF-DC4A supports two selectable DC current ranges: 4–20 mA and 0–20 mA. The 4–20 mA range is widely used in process control because it provides a live-zero signal, making it easier to distinguish a valid zero-level measurement from certain wiring or signal faults. The 0–20 mA range is available for equipment designed to use that signal standard.
Q4: What is the maximum load resistance supported by the 2MLF-DC4A?
The specified maximum load resistance for the current output is 600 Ω. The total loop resistance includes the receiving device, cable resistance, and other components connected in series. If the loop resistance exceeds the specified limit, the module may not maintain the commanded output current accurately. Check the complete loop resistance before connecting field equipment.
Q5: How accurate is the analog current output?
The specified output accuracy is ±0.2% or less at an ambient temperature of 25°C. Across the specified operating temperature range, the accuracy is ±0.3% or less. The module provides a maximum resolution of 1/16,000 per output range, with a resolution of 1.0 μA for 4–20 mA and 1.25 μA for 0–20 mA. These characteristics support fine adjustments in industrial process control applications.
Q6: What should be checked if the output current does not match the PLC command value?
First, verify that the correct output range is configured for the affected channel. Check the digital data format, PLC program scaling, and output value limits. Then inspect the terminal connections, field wiring, and receiving device. Measure the current with a suitable calibrated meter and confirm that the total loop resistance does not exceed 600 Ω. If the wiring and configuration are correct but the output remains inaccurate, inspect the module status and PLC diagnostic information.
Q7: Does the 2MLF-DC4A provide electrical isolation between output channels?
No. The 2MLF-DC4A does not provide isolation between its individual output channels. It uses photocoupler isolation between the input terminals and the PLC power supply. This distinction is important when designing the control cabinet and connecting field devices with different grounding potentials. If channel-to-channel isolation is required, select a module specifically designed to provide that function.
Q8: What should be considered when replacing or commissioning a 2MLF-DC4A module?
Before replacement, confirm that the new module has the exact 2MLF-DC4A model designation and is suitable for the MasterLogic-200 system. Check the terminal wiring, channel assignments, output ranges, digital data formats, and power requirements. During commissioning, test each channel individually and compare the measured current with the PLC command value. Also verify the receiving device response and ensure that the current loop resistance remains within the specified limit.
Honeywell 2MLF-DC4A Current Output Module is in stock. Please contact us for a quick quote and competitive pricing.
| Company Information | ||||||||
| [email protected] | ||||||||
| Mobile | +8613666084105 | |||||||
| +8613666084105 | ||||||||
| 13666084105 | ||||||||
| Add to | Room 1004, No. 62 Xiangxiu Li, Siming District, Xiamen City, Fujian Province, China | |||||||
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