Eaton Crouse-Hinds MTL5544D HART Repeater Power Supply with Dual Outputs
ManufacturerEatonModelMTL5544DProduct TypeHART Repeater Power Supply, Dual Output
01Technical Summary
The Eaton Crouse-Hinds series MTL5544D is a DIN-rail-mounted, one-channel repeater power supply for a two- or three-wire 4...20 mA transmitter in a hazardous area. It repeats one field-loop current into two isolated safe-area loads and supports bidirectional HART communication through channel 1 for compatible two-wire transmitters.
Selection ControlMatch the exact model, part number, installed system, wiring, approvals, and required revision before ordering.
02Applications
- Dual indication or control paths from one hazardous-area 4...20 mA transmitter.
- Safety and control architectures that require two isolated safe-area current outputs.
- HART maintenance access through the channel 1 output path.
- DIN-rail-mounted MTL5500 intrinsic-safety interface systems.
03Specifications
| Manufacturer | Eaton |
|---|---|
| Model | MTL5544D |
| Product Type | Repeater power supply with dual outputs |
| Number of Field Channels | 1 |
| Safe-Area Outputs | 2 |
| Transmitter Types | 2-wire or 3-wire 4...20 mA |
| Supply Voltage | 20...35 V DC |
| Input Range | 0...24 mA including overrange |
| Output Signal Range | 4...20 mA |
| Output Overrange | 0...24 mA |
| Load at 20 mA | 0...450 ohm per output |
| Load at 24 mA | 0...360 ohm per output |
| Transmitter Voltage | 16.5 V at 20 mA |
| Transfer Accuracy at 20 deg C | Better than 15 uA |
| Temperature Drift | <0.8 uA per deg C |
| Response Time | Within 10% of final value in 50 us |
| HART Support | Channel 1 only |
| Maximum Current Consumption | 96 mA at 24 V DC with 20 mA signals |
| Power Dissipation | 1.4 W at 24 V DC with 20 mA signals |
| Functional Safety | SIL3 capable under documented IEC 61508 use conditions |
04Features
Design and Function
- Powers one hazardous-area transmitter and drives two safe-area current loads.
- Fully floating field supply and isolated safe-area output circuits.
- Bidirectional HART communication is supported through channel 1 for two-wire transmitters.
- Separately powered four-wire current sources may be connected, but HART is not supported for that arrangement.
- Green LED indicates power.
- No operator configuration switches are required for the module function.
- Functional-safety documentation covers use in safety instrumented functions.
Verified Identity
- Manufacturer: Eaton Model: MTL5544D Product Type: HART Repeater Power Supply, Dual Output
05Compatibility
- A suitable load must be present on both outputs for correct operation.
- HART communication is available on channel 1 only.
- Confirm two-wire or three-wire transmitter wiring and the 20...35 V DC supply.
- Verify entity parameters, hazardous-area classification, and loop certification before installation.
- MTL4544D is functionally related but uses MTL4500 backplane mounting; it is not a DIN-rail drop-in replacement.
06Maintenance & Replacement
- Record both safe-area load circuits and the HART connection path before removal.
- Do not leave either output unloaded during commissioning tests if transfer accuracy is being evaluated.
- After replacement, verify current transfer to both loads across the operating range.
- Test HART communication through channel 1 and confirm no HART requirement exists on channel 2.
- Follow the current Eaton safety manual when the module is part of a SIL application.
FAQFrequently Asked Questions
How many field channels does MTL5544D have?
It has one hazardous-area transmitter channel.
How many safe-area outputs are provided?
It repeats the field current into two safe-area outputs.
Which output supports HART?
Bidirectional HART communication is supported through channel 1 only.
Can a four-wire transmitter be connected?
A separately powered current source can be connected, but HART communication is not supported in that arrangement.
What supply voltage is required?
The documented supply range is 20...35 V DC.
Is the module SIL capable?
Yes. Eaton documents SIL3 capability subject to the applicable safety manual and system architecture.
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