Eaton Crouse-Hinds MTL4015 Dual-Relay Switch/Proximity Detector Interface
ManufacturerEatonModelMTL4015Product TypeDual-Relay Switch / Proximity Detector Interface
01Product Overview
The Eaton Crouse-Hinds series MTL4015 is a one-channel switch or proximity-detector interface that uses two safe-area relay outputs. It is intended where one hazardous-area sensor status must be sent to two systems, such as control and shutdown, and it includes selectable phase reversal plus line-fault detection.
Selection ControlMatch the exact model, part number, installed system, wiring, approvals, and required revision before ordering.
02Functions
Operating Functions
- One field sensor controls two safe-area relay loads.
- Suitable for separate control and shutdown status paths.
- Top-mounted phase-reversal switch selects the required alarm logic.
- Built-in line-fault detection identifies broken or shorted field lines.
- Optional earth-fault monitoring is available through an MTL4220 connection.
- Relay outputs open when de-energized.
- LEDs provide local power and output-state indication.
Product Identity
- Manufacturer: Eaton Model: MTL4015 Product Type: Dual-Relay Switch / Proximity Detector Interface
03Specifications
| Manufacturer | Eaton |
|---|---|
| Model | MTL4015 |
| Product Type | Switch / proximity detector interface |
| Number of Input Channels | 1 |
| Safe-Area Outputs | 2 relay outputs |
| Sensor Voltage | 7.0...9.0 V DC from 1 kohm |
| Output Closed Threshold | >2.1 mA in sensor circuit |
| Output Open Threshold | <1.2 mA in sensor circuit |
| Line Break Threshold | <100 uA |
| Short-Circuit Threshold | >6.5 mA |
| Relay Response Time | 2 ms maximum |
| Contact Rating | 10 W, 0.5 A, 35 V DC |
| Supply at 24 V | 50 mA |
| Power Dissipation | 1.2 W at 24 V |
| Isolation | 250 V AC between safe and hazardous circuits |
| Indicators | Amber output LED and green power LED |
04Compatibility
- Match the field sensor type and the existing line-fault detection resistor arrangement.
- Confirm whether phase reversal is enabled and reproduce the selected logic.
- Terminals 8/9 and 11/12 are the two relay outputs; 13/14 are the supply.
- An MTL4220 may be connected through terminal 6 when earth-fault detection is required.
- Eaton lists MTL4511 as the nearest equivalent but notes that it lacks the repeat contact; MTL4510B may be considered when a repeat contact is required, with terminal checks.
05Applications
- Hazardous-area proximity detector interfacing.
- Dual reporting of one switch status to control and shutdown systems.
- NAMUR or DIN 19234 proximity-detector circuits.
- Legacy MTL4000 backplane installations requiring dual relay outputs.
06Lifecycle
- Record phase reversal, LFD enablement, earth-fault connection, and both relay circuits.
- Inspect end-of-line resistors and field cable condition before blaming the interface module.
- After replacement, test normal state, alarm state, line break, short circuit, and both relay outputs.
- Confirm that reactive loads are adequately suppressed.
- Review the replacement comments before migrating because relay functions and terminal assignments differ.
FAQFrequently Asked Questions
How many field channels does MTL4015 have?
It has one hazardous-area input channel.
Why are there two outputs?
The same sensor state can be sent to two independent safe-area systems, such as control and shutdown.
Does it detect cable faults?
Yes. Built-in line-fault detection can identify open and shorted field lines.
Can the output logic be reversed?
Yes. A top-mounted phase-reversal switch changes the output response.
What are the relay contact limits?
The documented rating is 10 W, 0.5 A, and 35 V DC.
Is MTL4511 an exact functional replacement?
Not always. Eaton notes that MTL4511 has no repeat contact; MTL4510B may be required when that function is needed.
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| BOS0005 08M-PS-RD11-02 | 03031-0001-0002 | STEP-PS/1AC/24DC/4.2 |
