Product Overview

The SLP16D belongs to the cost-effective SLP range of surge protectors. This device protects digital and analog I/O circuits. Each SLP module protects two process loops or one 4-wire circuit. The SLP16D uses a multi-stage hybrid protection circuit. Maximum surge current reaches 20kA per line. The device suits all process I/O applications with various voltage ratings.

Series and Product Classification

• Series: SLP Range (Surge Protection)

• Product Type: Surge Protection Device

• Product Classification: Other Series

• Current Price (RMB): ¥680.00

• Gross Weight: 0.14 kg

Technical Specifications

This section details the core parameters of the SLP16D.

General Surge Protection Specifications

• Maximum Surge Current: 20kA (8/20µs waveform per line)

• Leakage Current: <1µA at working voltage

• Maximum Rated Load Current: 1.50A

• Loop Resistance: 2 ohms

• Response Time: <1 nanosecond

• Capacitance Line to Line: 60pF

Bandwidth and Attenuation

The SLP16D handles high-speed signals without degradation.

• Attenuation -0.1dB: 9kHz to 37MHz

• Attenuation -3dB: 50MHz

• Bandwidth: 50MHz

Environmental Specifications

• Working Temperature: -40 to +80°C

• Storage Temperature: -40 to +176°F

• Humidity: 5 to 95% RH non-condensing

• Degree of Protection: IP20

• Case Flammability Rating: UL94-V0

• Service Conditions: 80kPa to 160kPa pressure

Model Specific Parameters for SLP16D

• Nominal Voltage: 16V

• Rated Voltage (MCOV): 18V

• Nominal Current: 1.50A

• Nominal Discharge Current (8/20µs): 3kA

• Maximum Discharge Current (8/20µs): 20kA

• Lightning Impulse Current (10/350µs): 2.5kA

• Residual Voltage at isn: 23V

• Voltage Protection Level at 1kV/µs: <18V

• Series Resistance per Line: 1.0Ω

• Capacitance: 60pF

Test Categories and Durability

• Category Tested: A2, B2, C1, C2, C3, D1

• Overstressed Fault Mode at 3kA: 22kA

• Impulse Durability (8/20µs): 10kA

• AC Durability: 1Arms, 5T

Mechanical Specifications

• Terminals Size: 2.5mm² (12 AWG)

• Electrical Connections: Plug and header screw terminal strip

• Mounting: T-section DIN rail (35 x 15mm rail)

• Weight: 140g approximately

• Case Material: UL94-V0 rated

EMC Compliance

• BS EN 60950-1:2006+A12:2011

• BS EN 61326-1:2006

• BS EN 61010-1:2010

Installation Guide

Follow these steps to install the SLP16D correctly.

1. Mount DIN Rail: Secure T-section DIN rail (35 x 15mm) in your cabinet.

2. Clip Module: Push the SLP16D onto the rail until it clicks.

3. Earth Connection: The rail automatically provides high-integrity earthing.

4. Wire Input Side: Connect field side signals to the input terminals.

5. Wire Output Side: Connect protected equipment to the output terminals.

6. Verify Polarity: Check that loop current does not exceed 1.50A.

The SLP16D requires no external power or calibration. The hybrid circuit resets automatically after each surge event. For adverse environments, use the specially-plated DIN rail version.

Package List

The package includes the following physical items.

• SLP16D surge protection module (1 piece)

• Plug-in screw terminal strip (installed)

• Product label with rating information

*Note: DIN rail is not included in the package. Purchase T-section 35 x 15mm rail separately.*

Frequently Asked Questions (FAQ)

1. How many process loops does one SLP16D protect?
The SLP16D protects two complete process loops. Each module contains hybrid surge protection for two loops. You can also use it for one 4-wire circuit. This high packing density saves cabinet space significantly.

2. What happens after the SLP16D diverts a surge?
The SLP16D resets automatically after each surge event. The hybrid circuit uses solid state electronics and a gas discharge tube. No manual reset or replacement is needed after normal surges. The device continues protecting your equipment immediately.

3. Can I use the SLP16D with HART communication signals?
Yes, the SLP16D has 50MHz bandwidth with very low attenuation. Signal loss is only -0.1dB from 9kHz to 37MHz. This covers the HART frequency range completely. The low 60pF capacitance also preserves digital signal quality.

4. What is the response time of the SLP16D during a surge?
The SLP16D responds in less than 1 nanosecond. This instantaneous reaction prevents equipment exposure to damaging surges. The device clamps output voltages to safe levels immediately. Your field instruments and I/O cards remain fully protected.

5. Does the SLP16D work in Zone 0 hazardous areas?
Yes, the SLP range includes ATEX certified intrinsically safe protectors. The SLP16D is designed for hazardous area installations. Verify your specific certificate model matches your zone requirements. The device adds virtually no loop resistance or voltage drop.

6. What does the 10-year no-fuss warranty cover?
The SLP16D comes with a standard 10-year product warranty. If a correctly connected device fails for any reason, return it for free replacement. This warranty covers surge damage even after multiple events. Normal wear and incorrect wiring are not covered.

Related Accessories

Enhance your surge protection system with these compatible parts.

• Plated DIN Rail: MTL-RAIL-PLATE for adverse environments

• End Clamp: MTL-END-CLIP for secure rail mounting

• Label Set: SLP-LABEL for loop identification

• Dummy Module: SLP-BLANK for unused rail spaces

Always use genuine MTL components with the SLP16D. Third-party DIN rails may not provide the required high-integrity earth connection.