MTL 4646Y Dual Fieldbus Power Supply | 2x 500mA, IS, Diagnostics, DIN Rail, ATEX/IECEx Specs

MTL 4646Y Dual Fieldbus Power Supply | 2x 500mA, IS, Diagnostics, DIN Rail, ATEX/IECEx Specs

MTL 4646Y dual-channel fieldbus power supply specifications. Two independent H1/PA segments, 500mA each, advanced diagnostics, 24V DC. ATEX/IECEx approved for hazardous areas.

Product Overview

The MTL 4646Y​ is a dual-channel advanced fieldbus power supply​ from MTL's 4600 series, designed to provide regulated power, signal conditioning, and comprehensive diagnostics​ for two independent FOUNDATION Fieldbus H1 or PROFIBUS PA segments. Each channel delivers a high 500 mA of fieldbus power, features integrated diagnostics (indicated by the "Y" suffix), provides short-circuit and overload protection, and carries ATEX and IECEx approvals​ for Zone 1 hazardous area installations. The 4646Y is a high-capacity, intelligent solution for demanding fieldbus networks requiring robust power and monitoring.

Technical Specifications

Note: Specifications are based on MTL 4600 series documentation. The "Y" suffix indicates a specific feature set, typically including enhanced diagnostics. Always verify with the latest product datasheet.

Key Features

• High Current Capacity:​ 500 mA per channel for power-intensive segments

• Dual Independent Channels:​ Two completely isolated segments in one unit

• Advanced Diagnostics:​ Comprehensive real-time monitoring and fault detection

• RS-485 Interface:​ Remote configuration and diagnostic access via Modbus RTU

• Configurable Parameters:​ Current limits, alarm thresholds, termination set via software

• Intrinsic Safety:​ Approved for Zone 1 hazardous locations

• Event Logging:​ Stores diagnostic events for troubleshooting and predictive maintenance

• Multi-color Status LEDs:​ Detailed visual indication of each channel's health

• Global Approvals:​ Certified for international hazardous area applications

• SIL 2 Capable:​ Suitable for safety instrumented systems when properly configured

Electrical Characteristics (per channel)

Diagnostic Monitoring Parameters (per channel)

LED Status Indication (per channel)

Entity Parameters (for Hazardous Area Design, per channel)

Note: The 4646Y is an associated apparatus. All connected fieldbus devices must be intrinsically safe certified. The 800mA shared limit must be considered in system design.

Load Sharing and Configuration

Critical: The total combined output for both channels must not exceed 800mA.

Typical Applications

• High-Demand Process Units:​ Segments with many devices or high-power instruments

• Critical Control Loops:​ Safety and environmental monitoring systems

• Predictive Maintenance Programs:​ Facilities using diagnostic data for analytics

• Remote Monitoring Sites:​ Offshore platforms or unmanned facilities

• SIL 2 Applications:​ Safety instrumented systems requiring diagnostics

• Large Tank Farms:​ Multiple high-density measurement segments

• Power Generation:​ Critical boiler and turbine control networks

• Any application​ requiring two high-current fieldbus segments with advanced health monitoring

Important Technical Notes

1. Shared Current Limit:​ The 800mA total output is a critical design parameter. The sum of both channel loads must be ≤ 800mA.

2. Power Supply Requirements:​ Requires a robust 20-30V DC input. Recommended: 24V DC, 3A capacity minimum.

3. Configuration Software:​ Initial setup requires configuration software (via RS-485) for current limits, termination, and alarm setpoints.

4. Thermal Management:​ High current capacity requires excellent ventilation. Do not install in confined spaces or exceed ambient temperature limits.

5. Diagnostic Utilization:​ Implement alarms for warning conditions (yellow LED) to enable proactive maintenance before faults occur.

6. Certification Compliance:​ Verify that the 4646Y's specific certifications match the hazardous area classification (Zone 1, IIC, T6).

7. Grounding and Shielding:​ Follow manufacturer's instructions precisely for fieldbus shield grounding to ensure communication integrity.

8. SIL Applications:​ For SIL 2 use, follow all manufacturer guidelines for configuration, proof testing, and diagnostic coverage.

9. Event Log Review:​ Periodically review the event log via the RS-485 interface to identify trends or recurring issues.

10. Pre-Commissioning Check:​ Before connecting field devices, configure each channel's current limit appropriately and verify termination settings.

Note: This data sheet provides general specifications for the MTL 4646Y advanced dual-channel fieldbus power supply. For complete installation guidelines, configuration software manual, Modbus register map, diagnostic interpretation, and safety instructions, consult the official MTL 4600 Series Technical Manual​ and 4646Y Configuration Guide. Always verify that the product configuration matches your application requirements and strictly adhere to the 800mA total current limit.

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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

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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.

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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.

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One-year Warranty.

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