MTL 5082 Dual Isolator | 2-Ch, 4-20mA/0-20mA, 0-10V, mV, IS, DIN Rail, ATEX/IECEx

MTL 5082 Dual Isolator | 2-Ch, 4-20mA/0-20mA, 0-10V, mV, IS, DIN Rail, ATEX/IECEx

MTL 5082 dual-channel signal conditioner. Two isolated analog inputs (mA/V), two outputs, 24V DC powered, DIN rail. ATEX/IECEx certified for hazardous areas.

Product Overview

The MTL 5082​ is a dual-channel, analog input signal conditioner and isolator​ from MTL's 5000 series. It accepts a wide variety of 4-20mA, 0-20mA, 0-10V, 0-5V, 1-5V, and ±20mV input signals​ from hazardous area sensors. Each channel provides intrinsic safety (IS) protection, galvanic isolation, and signal conditioning, delivering an independent, isolated 4-20mA output. Housed in a compact 12.5mm module, it is designed for high-density installations where two isolated channels are required, offering a cost-effective and space-saving solution.

Technical Specifications

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

Key Features

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

• Universal Input Flexibility:​ Each channel can be independently configured for common mA or V input signals, including mV for low-level sensors.

• Complete Galvanic Isolation:​ 500V isolation between channels, and between each channel and the outputs/power supply, eliminating ground loops.

• Intrinsic Safety:​ Certified for Zone 1/21, protecting field devices and control systems in hazardous locations.

• High Accuracy & Stability:​ ±0.1% accuracy with excellent noise rejection and low temperature drift.

• Active Output:​ Standard 4-20mA sourcing output for each channel, capable of driving long cables or high loads.

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

• Per-Channel Diagnostics:​ Independent bicolor LEDs for each channel indicate power, normal operation, and fault conditions (e.g., burnout).

• Global Hazardous Area Approvals:​ Certified for worldwide use in explosive atmospheres.

Input/Output Signal Ranges (Per Channel, Configurable)

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

Terminal Block Layout

The module has 8 or 9 screw terminals, logically grouped for two identical channels and power.

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.

Wiring Diagram (Example: Two 2-Wire Transmitters)

[Hazardous Area]                 [Safe Area]
Transmitter 1(+) ---- I1+  MTL
Transmitter 1(-) ---- I1-  5082
                          |   O1+ ----[+24V Out PSU]
[IS 24V Supply +]---------+   O1- ----[PLC Ch1 Input]
[IS 24V Supply -]---------------------------------.
                                                   |
Transmitter 2(+) ---- I2+  MTL                   |
Transmitter 2(-) ---- I2-  5082                   |
                          |   O2+ ----[+24V Out PSU]
                          |   O2- ----[PLC Ch2 Input]
                          |   PWR+ --[+24V Mod PSU]
                          |   PWR- --[0V]

Key: Three separate 24V DC supplies are required: 1 IS supply for field transmitters, 1 for module power, and 1 (or more) for the output loops.

DIP Switch Configuration Overview (Per Channel)

Each channel 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

• Multi-Point Sensor Isolation:​ Isolating signals from multiple pressure, level, or flow transmitters in a single, compact unit.

• Mixed Signal Processing:​ Handling a combination of current (4-20mA) and voltage (0-10V) signals from different types of field instruments.

• Load Cell/Strain Gauge Interface:​ Condition low-level mV signals from weigh scales or pressure sensors in hazardous areas.

• High-Density Control Panels:​ Maximizing I/O count in space-constrained panels, such as in skid-mounted equipment or retrofit projects.

• SIL Applications:​ Providing redundant, isolated signal paths for safety instrumented systems (SIL 2).

• General Purpose Signal Conditioning:​ Any application requiring isolation and conversion of two analog signals with high accuracy.

Important Technical Notes

1. Three Power Supplies Required:​ The 5082 typically requires three separate 24V DC supplies: one IS supply​ for the field transmitters, one standard supply​ for the module's internal electronics, and separate, isolated 24V DC supplies for each output loop. These can sometimes be combined if the supplies are isolated and rated correctly.

2. Input is Passive:​ In current input​ mode, the 5082 provides a passive input (sinking). A separate IS 24V supply is required to power a 2-wire transmitter​ in the hazardous area.

3. 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.

4. Complete Channel Isolation:​ The two input channels are galvanically isolated from each other. This allows connecting signals with different ground potentials.

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

6. mV Input Sensitivity:​ For 0-20mV ranges, use shielded, twisted pair cable​ and ground the shield at the 5082 end only to prevent noise pickup.

7. Per-Channel Configuration:​ Each channel is configured independently. Ensure DIP switches match the connected field device's output signal.

Note: This data sheet provides general specifications for the MTL 5082 dual-channel signal conditioner. 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 and configuration.

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