MTL4646 – 4-20mA Signal Driver with Bi-Digital Communication

MTL4646 HART Valve Driver: Precision Control for Smart Positioners

Technical Performance

• Brand/Series: MTL 4000 Series Signal Conditioners
• Model: MTL4646
• Signal Range: 4-20mA + HART® digital
• Frequency Response: 500Hz-10kHz for HART®
• Accuracy: ±20μA at 20°C
• Temperature Stability: <1.0μA/°C drift
• Load Capacity:
  – Max: 800Ω
  – Min: 90Ω (fault detection at <50Ω)
• Signal Cleanliness: <40μA ripple
• Failure Modes:
  – Normal: <6.0V
  – Open/Short: <0.9mA

Key Advantages

• Valve diagnostics: Real-time HART® data for position feedback
• Overload protection: Handles up to 24mA (520Ω load)
• Plug-and-play: No configuration needed
• Isolation barrier: >1MΩ output resistance

Installation & Compatibility

• Wiring: Simple 2-wire connection (signal + return)
• Compatible Devices:
  – HART® valve positioners
  – Current-to-pressure converters
  – PLC analog outputs
• Fault Monitoring: Connect to controller with readback function

Package & Support

• Includes: MTL4646 unit, installation sheet
• Warranty: 12-month quality guarantee
• Shipping: FedEx, UPS, DHL express options

Expert FAQs

• Q: Can I use this without HART devices?
  A: Yes – works with standard 4-20mA signals
• Q: What triggers fault detection?
  A: Current drops below 0.9mA (opens/shorts)
• Q: Minimum load requirement?
  A: 90Ω minimum for proper operation
• Q: Is calibration needed?
  A: No – factory calibrated for plug-and-play use
• Q: Can it drive multiple valves?
  A: No – single channel per MTL4646 unit

Upgrade your valve control: The MTL4646 delivers smart diagnostics and failsafe protection!