Description
MTL4549C Dual Isolator: Reliable Signal Transfer for Two Devices
The MTL4549C takes two 4-20mA control signals from safe areas to drive devices in hazardous locations. It works with I/P converters, valve positioners, and other loads. It supports HART communication and detects broken wires.
Technical Specifications
Brand & Model: MTL MTL4549C Dual Channel Isolator
Channels: Two independent 4-20mA channels
Input/Output Signal: 4-20mA with HART support
Maximum Load: 800Ω per channel (16V at 20mA)
Accuracy: Better than 20μA
Response Time: < 100ms
Digital Bandwidth: 500Hz to 10kHz (HART signals)
Power Supply: 20-35V DC
Power Consumption: 70mA at 24V
Operating Temperature: -20°C to +70°C
Fault Detection: Open circuit detection only
Easy Installation
Connect your two controller outputs to the input terminals. Connect your field devices to the output terminals. The MTL4549C provides isolation and allows HART communication for device configuration.
Frequently Asked Questions
Q1: What types of devices can it drive?
A1: It works with I/P converters, valve positioners, and any 4-20mA load up to 800Ω.
Q2: Does it detect short circuits?
A2: No, the MTL4549C only detects open circuits (broken wires).
Q3: Can I use different devices on each channel?
A3: Yes, each channel operates independently with different field devices.
Q4: What is the advantage of HART support?
A4: It allows digital communication for configuration, calibration, and diagnostics.
Q5: How much voltage does it provide to field devices?
A5: It delivers up to 16V at 20mA to properly power your field instruments.
Shipping & Package
Includes one MTL4549C unit. We ship worldwide using FedEx, UPS, and DHL.
Your Guarantee
This product includes a 12-month warranty against defects.











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