MTL5513 MTL Instruments Switch Isolator

Eaton MTL5513 Dual-Channel Switch and Proximity Detector Interface

Product Introduction

The MTL5513 from the MTL5500 series interfaces switch or proximity detector signals from hazardous locations. This two-channel device accepts digital inputs and provides isolated outputs to safe-area circuits. Each channel operates independently with user-selectable phase reversal. Moreover, the unit includes line fault detection (LFD) with a red LED indicator. A green LED confirms power, while yellow LEDs show channel status. Its slim 15.8mm width makes it ideal for high-density mounting.

Technical Specifications

This isolator requires a 20-35Vdc power supply and consumes only 30mA at 24V. Typical power dissipation is 0.65W with 10mA loads. The maximum safe input voltage is ±35V, with a current limit of ±50mA. Sensor supply voltage measures 7-9Vdc from a 1kΩ ±10% source.

The MTL5513 accepts digital inputs from mechanical switches, proximity detectors, or other dry contact devices. Input characteristics are clearly defined: outputs open when input current falls below 1.2mA (input circuit resistance above 10kΩ). Outputs close when input current exceeds 2.1mA (input circuit resistance below 2kΩ). Hysteresis is set at 200µA (650Ω) nominal, which prevents output chatter near switching thresholds.

Channel Configuration and Flexibility

Each of the two channels on the MTL5513 can be configured independently. Phase reversal is user-selectable per channel, allowing you to choose between normally open or normally closed behavior. This flexibility simplifies integration with different sensor types without rewiring.

Line fault detection (LFD) is also selectable per channel via switches on the side of the unit. When enabled, the red LED illuminates to indicate a broken wire or short circuit. Consequently, troubleshooting becomes faster and more efficient.

Isolation and Safety Ratings

Galvanic isolation is rated at 250V rms between safe-area circuits and the power supply. This isolation protects control system inputs from voltage spikes originating in the field. The MTL5513 is approved for hazardous locations including Zone 0. It meets EN61326 EMC standards and carries IECEx/ATEX certification.

Switching Performance

Switching frequency ranges from DC to 500Hz. Therefore, the MTL5513 handles both slow mechanical switches and fast proximity sensors with ease. Response time is fast enough for most industrial counting and positioning applications.

Environmental and Mechanical Data

Operating temperature spans -20°C to 60°C. Storage temperature ranges from -40°C to 80°C. Humidity tolerance is 5-95% relative humidity, non-condensing. Dimensions are 109.8mm (L) x 118.8mm (H) x 15.8mm (W). Weight is only 150g.

Terminals accept stranded or solid conductors up to 2.5mm². Use crimp ferrules for secure and reliable connections. Mount the MTL5513 on a standard T-section 35mm DIN rail.

Installation Guidelines

First, ensure the power supply is within 20-35Vdc. Next, mount the unit on a 35mm DIN rail. Then, connect your switch or proximity detector to the input terminals of each channel. For proximity detectors, the MTL5513 provides the necessary 7-9Vdc sensor supply. After that, wire the output terminals to your safe-area control system (PLC or DCS). Finally, apply power and verify the green LED turns on. Use the side switches to set phase reversal and line fault detection per channel before commissioning.

Packaging List

• MTL5513 isolator (1 unit)

• Pre-installed terminal blocks

• Product identification label

• Printed quick start guide

Note: Cables, sensors, and mounting accessories are sold separately. No certificates or warranty documents are included in the package.

FAQ

1. Can the MTL5513 accept NAMUR proximity detectors?
Yes. The 7-9Vdc sensor supply and switching thresholds (1.2mA/2.1mA) comply with NAMUR standard EN 60947-5-6.

2. What does the red LFD LED indicate?
The red LED lights up when line fault detection is enabled and a wiring fault (broken wire or short circuit) is detected on that channel.

3. How do I reverse the phase on a single channel?
Use the user-selectable switch located on the side of the unit. Each channel has its own independent switch.

4. Can I use the MTL5513 with a mechanical limit switch?
Absolutely. Mechanical dry contacts work perfectly. The unit supplies a low voltage (7-9Vdc) across the contacts for wetting.

5. What is the maximum switching frequency?
The MTL5513 switches from DC up to 500Hz, making it suitable for high-speed proximity sensors and rotary encoders.