MTL 5044 Dual Isolator | 2-Ch Isolated Input, 4-20mA Output, IS, DIN Rail, ATEX/IECEx/FM

MTL 5044 Dual Isolator | 2-Ch Isolated Input, 4-20mA Output, IS, DIN Rail, ATEX/IECEx/FM

MTL 5044 dual-channel isolator specifications. Two 4-20mA/0-20mA/0-10V inputs, two isolated 4-20mA outputs, intrinsic safety, 24V DC, DIN rail. ATEX/IECEx/FM approved.

Product Overview

The MTL 5044​ is a dual-channel, two-wire isolator/transmitter​ from MTL's 5000 series, specifically designed for 4-20mA, 0-20mA, or 0-10V input signals​ from hazardous area sensors. It provides complete isolation between two input channels and their outputs, along with intrinsic safety (IS) protection. Each channel independently accepts a hazardous area signal, conditions it, and delivers an isolated 4-20mA output​ to the safe area. Its compact, two-channel design maximizes space efficiency in control panels.

Technical Specifications

Note: Specifications are based on MTL 5000 series documentation. DIP-switch configurable models are common. Always verify with the latest product datasheet.

Key Features

• Dual Independent Channels:​ Two fully isolated channels in a compact 12.5mm module, saving space and cost.

• Multi-Signal Input:​ Each channel individually configurable for common mA or V input signals (e.g., 4-20mA, 0-10V).

• Complete Isolation:​ 500V isolation between channels, and between each channel and the output/power supply.

• Intrinsic Safety:​ Certified for Zone 1/21, protecting both field devices and control system.

• High Accuracy & Stability:​ ±0.1% accuracy and low drift ensure reliable signal integrity.

• Flexible Output:​ Standard 4-20mA output for each channel, compatible with any control system input.

• Easy Configuration:​ Onboard DIP switches allow quick setup for input type, range, and burnout response.

• Compact & High-Density:​ Ideal for installations with high I/O count in limited panel space.

• Global Approvals:​ Certified for use in hazardous areas worldwide.

Input/Output Signal Ranges (Per Channel, Typical)

The 4-20mA output range is typically fixed. The input range selection linearly scales the input to this 4-20mA output.

Terminal Block Layout (Typical)

The module has 8 screw terminals, grouped logically for two identical channels.

Note: The Output - (O1-, O2-) terminals are the return path for the isolated 4-20mA output loop. An external 24V DC power supply is required for each output loop.

Entity Parameters (for Hazardous Area Loop Design) - Per Channel

The connected field device in the hazardous area must be IS certified, and its entity parameters must be compatible with these values.

Wiring Diagram (Example: Channel 1, 2-Wire Transmitter)

[Hazardous Area]                 [Safe Area]
2-Wire Xmtr(+) ---- I1+  MTL
2-Wire Xmtr(-) ---- I1-  5044
                          |
[IS 24V Supply +]---------+  (Powers the 2-wire transmitter)
[IS 24V Supply -]------------------------------------.
                                                     |
[Output 24V +] ----- O1+  MTL                       |
                     5044  O1- ----[Load, e.g., PLC Input]
[Output 24V -]---------------------------------------'

Key: Two separate 24V DC supplies are required: one Intrinsically Safe (IS) for the field transmitter, and one standard for the output loop.

DIP Switch Configuration Overview (Per Channel)

Each channel typically has its own bank of DIP switches (e.g., Switches 1-4 for Ch1, 5-8 for Ch2).

Refer to the product manual for the exact DIP switch coding table.

Typical Applications

• Signal Splitting/Re-transmission:​ Isolate and send one hazardous area transmitter signal to two separate control systems (DCS and PLC).

• High-Density Signal Isolation:​ Isolating multiple 4-20mA signals from field devices in a compact footprint.

• Mixed Signal Interfaces:​ Handling a combination of current and voltage signals from different sensors in one unit.

• Panel Retrofit/Expansion:​ Adding isolated channels to existing systems with limited space.

• SIL Applications:​ Providing galvanic isolation for safety instrumented system (SIL 2) loops.

Important Technical Notes

1. Dual Power Supplies Required:​ The 5044 requires two separate 24V DC supplies: one for the module's internal electronics (terminals 6-7), and a separate, isolated 24V DC supply for each output loop​ (connected to O1+ and O1- for Ch1, etc.).

2. Input Type is Passive:​ In current input​ mode, the 5044 provides a passive input (sinking). A separate IS 24V supply is required to power a 2-wire transmitter​ in the hazardous area. The 5044 does not provide loop power to the field device.

3. Complete Isolation:​ The two input channels are galvanically isolated from each other and from the outputs. This prevents ground loops and allows connecting signals with different ground references.

4. Output is Active:​ The 4-20mA output is an active, sourcing output. It requires an external 24V DC power supply to form the output loop.

5. Burnout Detection:​ Only functions in current input​ mode. It detects an open circuit in the input current loop.

6. Configuration per Channel:​ Each channel is configured independently via its own set of DIP switches. Ensure both are set correctly for their respective field devices.

7. Wiring Density:​ The 12.5mm width means terminals are close together. Use appropriate wire gauges and ensure proper strain relief.

Note: This data sheet provides general specifications for the MTL 5044 dual-channel isolator. For complete installation instructions, detailed DIP switch tables, wiring diagrams, intrinsic safety guidelines, and certification details, consult the official MTL 5000 Series Technical Manual​ and the product-specific data sheet. Pay special attention to the power supply requirements.