Honeywell 2MLF-DV8A 8-Channel Analog Voltage Output Module

Product Overview

The Honeywell 2MLF-DV8A is an 8-channel analog voltage output module for the MasterLogic-200 (ML200) PLC system. It provides 0–10V DC output signals to field actuators, servo drives, and VFDs, enabling precise control of motor speed, valve position, and process variables. With 12-bit resolution and photo-coupler isolation, it delivers reliable, noise-immune analog control for industrial automation and process control applications.

Key Specifications

• Product Type: 8-Channel Analog Voltage Output Module
• Series: MasterLogic-200 / ML200
• Output Channels: 8
• Output Type: Voltage (DC 0–10V)
• Resolution: 12-bit
• Accuracy: ±0.5% FS at 25°C
• Conversion Speed: 2 ms / 8 channels
• Load Resistance: ≥ 2 kΩ
• Isolation: Photo-coupler isolation between output and internal logic
• External Power Supply: DC 24V (20.4–28.8V)
• Current Consumption: 70 mA (from 5V internal bus)
• External Connection: 18-point removable terminal block
• Dimensions (W x H x D): 27.4 mm x 90 mm x 70 mm
• Weight: Approx. 110 g
• Operating Temperature: 0°C to +55°C

Features & Benefits

• 8-channel voltage output — high-density 0–10V control for servo drives, VFDs, and proportional valves in a single slot
• 12-bit resolution — 0.025V precision enables smooth motor speed control and accurate valve positioning
• Photo-coupler isolation — 560V AC isolation protects the CPU from ground loops and field-side surges
• Fast 2 ms conversion — 250 μs per channel update rate supports real-time servo and drive control
• High load impedance (≥2 kΩ) — compatible with standard VFD analog inputs and servo drive command inputs without signal loading

Typical Applications

• VFD speed reference control (0–10V) for pumps and fans
• Servo drive command voltage for positioning systems
• Proportional valve control in hydraulic systems
• Heater power controller voltage input
• Building automation damper and valve actuators
• Any application requiring 0–10V DC control signals

Installation Guide

1. Verify actuator input type — confirm your drives and actuators accept 0–10V DC input.
2. Install in I/O slot — mount the 2MLF-DV8A in any available ML200 I/O slot.
3. Connect 24V external power — wire DC 24V to the external power terminals.
4. Wire field devices — connect V+ and COM terminals to the actuator's analog input using shielded cable.
5. Configure output range — in SoftMaster, verify 0–10V range is selected and set hold-last or preset values for CPU fault conditions.
6. Verify output — force 0%, 50%, and 100% output and confirm with a precision multimeter.

FAQ

Q: What is the difference between 2MLF-DV8A and 2MLF-DC8A?
A: The 2MLF-DV8A outputs voltage (0–10V DC). The 2MLF-DC8A outputs current (4–20 mA). Choose DV8A for VFDs and servo drives; choose DC8A for valve positioners and standard process actuators.

Q: Can I use this for 0–5V or 1–5V output?
A: No. The 2MLF-DV8A is fixed at 0–10V output. For other voltage ranges, use the 2MLF-DV4A (4-channel with selectable ranges) or scale in software.

Q: What is the minimum load resistance?
A: 2 kΩ minimum. Loads below 2 kΩ will cause output voltage droop and inaccurate control. Most VFDs and servo drives have >10 kΩ input impedance, which is compatible.

Selection Tips

• Choose 2MLF-DV8A when your field devices require 0–10V DC control signals.
• For 4–20 mA current output, select 2MLF-DC8A instead.
• Verify your drive/actuator input impedance is ≥2 kΩ before ordering.
• For mixed voltage ranges, consider the 2MLF-DV4A (4-channel with selectable ranges).