Description
MTL4644D Isolator: Power & Isolate 2-Wire Transmitters
The MTL4644D is a versatile isolator and power supply for 2-wire and 3-wire 4-20mA transmitters. It provides loop power, isolates the signal, and can drive two separate loads. It also supports HART digital communication for smart devices.
Technical Specifications
Brand & Model: MTL MTL4644D Transmitter Isolator
Input Signal: 0 to 24mA (from 2-wire transmitter)
Output Signal: 4 to 20mA (to two loads)
Transmitter Supply: 16.5V at 20mA
Load Capacity: Up to 450Ω at 20mA
Accuracy: Better than 15μA
Response Time: 50 microseconds
HART Support: Yes (on Channel 1 output)
Power Supply: 18-30V DC
Power Consumption: 96mA at 24V
Ripple: < 50μA peak-to-peak
Operating Temperature: -20°C to +60°C
Simple Setup
Connect your 2-wire transmitter to the input. Connect your controllers or recorders to the two outputs. The MTL4644D provides power to the transmitter and isolates the signal.
Frequently Asked Questions
- Q1: What is a 2-wire transmitter?
A1: It is a device that uses the same two wires for both power and sending its 4-20mA signal. - Q2: Can I use it with a 3-wire transmitter?
A2: Yes, the MTL4644D works with both 2-wire and 3-wire transmitters. - Q3: How many devices can it connect to?
A3: It can drive two separate loads (like two controllers or indicators) with the same signal. - Q4: Does it work with HART transmitters?
A4: Yes, it allows HART digital signals to pass through for setup and diagnostics. - Q5: What is the advantage of a fast response time?
A5: A 50μs response means almost instant signal updating for critical process control.
Shipping & Package
Includes one MTL4644D unit. We ship globally using FedEx, UPS, and DHL.
Your Guarantee
This product comes with a 12-month warranty from the date of purchase.











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