MTL 4544 Quad Fieldbus Power Supply | 4x 350mA, IS, DIN Rail, ATEX/IECEx/FM Specs

MTL 4544 Quad Fieldbus Power Supply | 4x 350mA, IS, DIN Rail, ATEX/IECEx/FM Specs

MTL 4544 quad-channel fieldbus power supply specifications. Four independent H1/PA segments, 350mA each, 24V DC, DIN rail. ATEX/IECEx/FM approved for hazardous areas.

Product Overview

The MTL 4544​ is a four-channel fieldbus power supply and conditioner​ from MTL's 4500 series, designed to provide regulated power and signal conditioning​ for four independent FOUNDATION Fieldbus H1 or PROFIBUS PA segments. Each channel delivers 350 mA of fieldbus power, provides independent short-circuit protection, includes individually switchable termination, and carries ATEX, IECEx, and FM approvals​ for Zone 1 hazardous area installations. The 4544 provides the highest density solution for powering multiple fieldbus networks from a single, space-efficient unit.

Technical Specifications

Note: Specifications are based on MTL 4500 series documentation. The 4544 provides four completely independent 350mA channels in one compact housing. The 800mA total output limit requires careful load planning. Always verify with the latest product datasheet.

Key Features

• High-Density Design:​ Four completely isolated 350mA fieldbus segments in one unit

• Maximum Space Efficiency:​ Optimal solution for control panels with multiple fieldbus segments

• Independent Channel Control:​ Each channel has separate termination, protection, and status indicators

• Independent Fault Protection:​ Short-circuit and overload protection per channel prevents cascade failures

• Intrinsic Safety:​ Approved for Zone 1 hazardous locations

• Per-Channel Status LEDs:​ Individual power, communication, and fault indicators for each segment

• Global Approvals:​ Certified for international hazardous area applications

• No Configuration Required:​ Plug-and-play operation

• Channel Isolation:​ Prevents cross-talk and fault propagation between segments

• Cost-Per-Channel Efficiency:​ Most economical solution for multiple segment installations

Electrical Characteristics (per channel)

LED Status Indicators (per channel)

Entity Parameters (for Hazardous Area Design, per channel)

Note: The 4544 is an associated apparatus. Each channel's connected fieldbus devices must be intrinsically safe certified. The entity parameters apply to each channel independently.

Load Planning Considerations

Important: The total combined output current for all four channels must not exceed 800mA.

Typical Applications

• Multi-Segment Control Systems:​ Powering four separate fieldbus segments from one location

• High-Density Control Panels:​ Where panel space is at a premium

• Process Units with Multiple Trains:​ Independent power for different process trains

• Large Tank Farms:​ Multiple level and temperature measurement segments

• Batch Processing Plants:​ Separate segments for different production stages

• Package Units/Skid Systems:​ Complete fieldbus power solution in compact footprint

• Retrofit Projects:​ Adding multiple fieldbus segments to existing infrastructure

• Any installation​ requiring 3-4 fieldbus power supplies where space is limited

Important Technical Notes

1. Power Supply Requirements:​ Requires a robust 20-30V DC input. Recommended: 24V DC, 3-4A capacity to support all channels.

2. Critical Load Planning:​ The 800mA total current limit is absolute. Design each segment's load to ensure the sum of all four channels ≤ 800mA.

3. Load Balancing:​ Distribute load evenly across channels where possible to prevent thermal hotspots and ensure optimal performance.

4. Independent Operation:​ Channels are electrically isolated. A fault on one channel does not affect the others.

5. Termination Settings:​ Each channel's termination must be set independently based on segment topology.

6. Thermal Management:​ The 4544 can generate significant heat with multiple channels loaded. Ensure excellent ventilation, spacing, and consider derating at high ambient temperatures (>40°C).

7. Wiring Consideration:​ Four fieldbus segments require careful cable management. Maintain separation between fieldbus cables in cable trays.

8. Certification Compliance:​ Verify certifications match hazardous area classification. Each channel has independent entity parameters for IS calculations.

9. LED Diagnostics:​ Individual channel LEDs simplify troubleshooting. A red FAULT LED indicates issues specific to that channel only.

10. Input Power Connection:​ Use appropriate wire gauge for the input current (up to 2.4A). Ensure secure connections to handle the total load.

Note: This data sheet provides general specifications for the MTL 4544 four-channel fieldbus power supply. For complete installation guidelines, thermal derating curves, wiring diagrams, and safety instructions, consult the official MTL 4500 Series Technical Manual. Always verify that the product configuration and certifications match your specific application requirements, and ensure your load distribution complies with the 800mA total current limit.

More Products

Pepperl Fuchs Safety Barrier

Allen Bradley PLC Controllers

SICK Instruments 

Festo Cylinder 

IFM Sensors 

About ACH

Founded in 2012, ACH is a top-tier distributor of industrial automation products, supplying genuine devices from leading brands like ABB, P+F, E&H, AB, MTL and EMERSON to emerging markets worldwide. Our mission is to provide 100% Genuine products at the most competitive prices, helping customers reduce costs and strengthen their market position.

Frequently Ask & Questions

Are preferential prices available?

Long-term brand partners can get competitive product prices. At the same time, ACH controls the profit per order to 5%, providing the most competitive prices.

Are the Products Genuine OEM Units?

Yes, all products from ACH are certified genuine OEM units. We acquire our inventory through official OEM channels and trusted third-party suppliers, ensuring every item is authentic and reliable.

How will you arrange shipment?

We'll handle the shipping for you. Through our partnerships, we can secure competitive rates with major carriers like FedEx, DHL, TNT, and UPS, ensuring a smooth and cost-effective delivery.

What is the warranty of goods?

One-year Warranty.

How long is the logistics cycle of the product?

Products are divided into spot and futures, and the delivery period of different brands of products is also different. For details, please contact the ACH business manager.