Phoenix PLC-RPT & PLC-PT Series: Industrial Signal Repeaters & Interface Modules - Comprehensive Application & Selection Guide

Product Positioning & Core Value

The Phoenix PLC-RPT (Repeater/Amplifier) and PLC-PT (Interface-Specific) Series represent a versatile lineup of industrial signal processing modules designed to enhance reliability, extend transmission distance, and enable seamless integration in complex automation systems. The PLC-RPT series focuses on signal repetition, amplification, and conditioning, supporting a wide voltage range (5DC~120UC) with functional variants for high-current loads, auxiliary outputs, hazardous area deployment, and sensor/actuator-specific interfaces. The PLC-PT series complements this with specialized interface modules compatible with ELR and EIK systems, ensuring compatibility with Phoenix’s broader industrial product ecosystem.

Engineered for harsh industrial environments, these modules feature robust construction, 35mm DIN rail mounting, and compliance with global standards (CE, UL, CSA). They are ideal for manufacturing, process control, power generation, and hazardous area applications, where stable signal transmission and system interoperability are critical. By amplifying weak signals, extending transmission distances, and providing dedicated interfaces, the series minimizes signal loss, reduces interference, and ensures uninterrupted communication between controllers, sensors, and actuators.

Product Family Overview

The product family is divided into two core sub-series, each tailored to specific signal processing and integration needs:

1. PLC-RPT Series (Signal Repeaters & Amplifiers)

• Function: Signal repetition, amplification, conditioning, and load driving for industrial control systems.
• Voltage Ranges: 5DC, 12DC, 48DC, 60DC, 72UC, 110UC, 120UC (UC = Universal Voltage, AC/DC compatible).
• Functional Variants:
  • HC: High-current relay output (for heavy-duty loads).
  • AU: Auxiliary output (for supplementary signal or power distribution).
  • 21-21: Dual-channel relay output (for parallel control tasks).
  • EX: Explosion-proof (ATEX/IECEx Zone 2 compliant for hazardous areas).
  • SEN: Sensor-dedicated interface (optimized for signal acquisition from industrial sensors).
  • ACT: Actuator-dedicated interface (optimized for driving industrial actuators).
  • MS: Mechanical status indicator (for visual fault and operation monitoring).
  • RW: Reverse polarity protection (enhanced electrical safety).
  • SSI: Synchronous Serial Interface (for high-precision position sensing).
• Typical Models: PLC-RPT-120UC/21HC, PLC-RPT-12DC/21-21/EX, PLC-RPT-5DC/1/SSI.

2. PLC-PT Series (Specialized Interface Modules)

• Function: Dedicated interface modules for compatibility with Phoenix ELR (Emergency Stop) and EIK (Interface) systems.
• Key Compatibility: ELR W1/2-24DC, EIK 1-SVN 24P/P.
• Core Purpose: Ensure seamless integration between PLC systems and specialized safety/interface components, simplifying wiring and enhancing system safety.
• Typical Models: PLC-PT-ELR W1/2-24DC, PLC-PT-EIK 1-SVN 24P/P.

Technical Specifications (Universal Parameters)

Detailed Function Module Introduction

1. PLC-RPT Series (By Voltage Category)

1.1 High-Voltage UC Models (72UC, 110UC, 120UC)

1.2 Medium-Voltage DC Models (48DC, 60DC)

1.3 Low-Voltage DC Models (5DC, 12DC)

1.4 Special Function Low-Voltage Models

2. PLC-PT Series (Specialized Interface Modules)

Application Scenario Analysis

1. Hazardous Area Control Systems

Recommended Configuration:

• Dual-Channel Control: PLC-RPT-120UC/21-21/EX (2909515)
• High-Current Loads: PLC-RPT-48DC/21HC (2900294)
• Safety Integration: PLC-PT-ELR W1/2-24DC (1069556)

Implementation Advantages:

• EX models meet ATEX/IECEx Zone 2 standards for explosive environments.
• High-current (HC) variants handle heavy-duty loads common in oil & gas and chemical industries.
• ELR-compatible PLC-PT modules ensure compliance with safety standards (EN ISO 13849-1).

2. High-Precision Manufacturing (CNC & Robotics)

Recommended Configuration:

• Position Sensing: PLC-RPT-5DC/1/SSI (1094764)
• Dual-Load Control: PLC-RPT-12DC/21-21 (2900329)
• Auxiliary Signal Distribution: PLC-RPT-120UC/21AU (2900310)

Implementation Advantages:

• SSI interface supports high-precision encoder signal repetition (critical for CNC machining).
• Low-voltage DC models minimize signal loss in sensitive robotic systems.
• Auxiliary outputs enable synchronization between position sensors and control systems.

3. Industrial Automation & Conveyor Systems

Recommended Configuration:

• Universal Voltage Systems: PLC-RPT-72UC/21-21/RW (2900347)
• Actuator Control: PLC-RPT-12DC/1IC/ACT (1078801)
• EIK Integration: PLC-PT-EIK 1-SVN 24P/P (2900397)

Implementation Advantages:

• UC models support both AC and DC input, simplifying global deployment.
• RW variants provide reverse polarity protection, reducing downtime from wiring errors.
• EIK-compatible modules ensure seamless integration with existing Phoenix interface systems.

4. Power Generation & High-Voltage Systems

Recommended Configuration:

• High-Current Loads: PLC-RPT-120UC/21HC (2900296)
• Auxiliary Signal Distribution: PLC-RPT-110UC/21AU/RW (2900323)
• Signal Amplification: PLC-RPT-120UC/21 (2900304)

Implementation Advantages:

• 120UC/110UC models handle high-voltage industrial power systems.
• HC variants drive heavy-duty equipment (generators, transformers).
• 2kV isolation minimizes EMI, ensuring stable signal transmission in high-voltage environments.

Selection Guide

Step 1: Determine Supply Voltage

• Low-Voltage DC (5DC~12DC): For sensor/actuator systems, robotics, and low-power equipment.
• Medium-Voltage DC (48DC~60DC): For battery-powered systems, automated warehouses, and mobile equipment.
• High-Voltage UC (72UC~120UC): For industrial power systems, heavy machinery, and global applications (AC/DC compatibility).

Step 2: Choose Output Configuration

Step 3: Select Functional Features

• Hazardous Areas: Choose EX suffix models (ATEX/IECEx Zone 2 compliant).
• Reverse Polarity Protection: Opt for RW suffix models (critical for field wiring).
• Status Monitoring: Select MS suffix models (mechanical indicators for visual feedback).
• Sensor/Actuator Optimization: Use SEN (sensor) or ACT (actuator) suffix models for improved compatibility.
• Safety System Integration: PLC-PT series for ELR/EIK system compatibility.

Step 4: Confirm Environmental & Safety Requirements

• Operating Temperature: Ensure model matches ambient conditions (-25°C~70°C standard, -20°C~60°C for EX).
• Load Capacity: Verify relay current rating (5A standard, 10A HC) matches application needs.
• Certifications: Confirm compliance with local standards (CE, UL, CSA) and hazardous area requirements (EX models).

Installation & Maintenance Guide

Installation Steps:

1. Mounting: Snap the module onto a 35mm DIN rail in the control cabinet, ensuring proper ventilation.
2. Wiring: Connect supply voltage, input signal, and load wires according to polarity markings (use 0.14~2.5mm² conductors).
3. Torque: Tighten terminal screws to 0.5~0.8Nm for secure connections (prevents vibration-induced loosening).
4. Grounding: Ensure proper grounding of the module to minimize EMI and enhance safety.
5. Testing: Verify LED/mechanical indicators (power-on = green, signal active = yellow) post-installation.

Maintenance Points:

• Status Monitoring: Regularly check indicators (red = fault, replace immediately).
• Fault Troubleshooting: Use LED/mechanical feedback to identify issues (e.g., reverse polarity, overcurrent).
• Replacement: Replace modules after fault indication or every 10 years (service life).
• Environmental Control: Keep installation area dry and free of dust (IP20 protection).
• Inspection: Conduct annual inspections for loose connections, damaged housing, and wire wear.

PLC-RPT & PLC-PT Series vs. Traditional Signal Processing Solutions

Summary & Next Steps

The Phoenix PLC-RPT and PLC-PT Series deliver robust, integrated signal processing and interface solutions for industrial automation systems. With wide voltage compatibility, functional versatility (high-current, hazardous area, sensor/actuator optimization), and seamless integration with Phoenix’s ELR/EIK ecosystems, these modules ensure reliable signal transmission and system interoperability in harsh industrial environments.