Phoenix PLC-RPT Series: 24DC PLC Interface Relay Modules - Selection Guide
Product Overview
The Phoenix PLC-RPT Series (24DC input) are industrial-grade interface relay modules designed to connect PLC outputs with external devices in automation systems. Dedicated to 24V DC power supplies, they offer reliable electrical isolation, signal conversion, and diverse contact configurations (changeover, high-capacity, gold-plated). Equipped with functional features like forced-guided contacts (FG), manual operation (MS), and explosion-proof (EX) design, these modules protect PLCs from high-load impacts and ensure stable operation. Suitable for -40℃~70℃ industrial environments, they support 35mm DIN rail mounting and tool-free push-in connections, ideal for machine control, process automation, and safety-related circuits.
Model Quick Reference Table
| Model No. | Product Name | Contact Configuration | Key Features | Application Scenarios |
|---|---|---|---|---|
| 2910537 | PLC-RPT-24DC/2X21/FG | 2 Changeover Contacts (2CO) | Forced-guided contacts (FG, safety-compliant) | Safety circuits (EN 61810-3), mechanical interlocks |
| 2910530 | PLC-RPT-24DC/21HC/MS | 1 Changeover Contact (1CO) | High-capacity (HC, 10A), Manual Operation (MS) | High-power load control + on-site debugging |
| 2900291 | PLC-RPT-24DC/21HC | 1 Changeover Contact (1CO) | High-capacity (HC, 10A) | General industrial high-power switching |
| 2909672 | PLC-RPT-24DC/21AU/MS | 1 Changeover Contact (1CO) | Gold-plated (AU, low-level), MS | Low-voltage signal control + maintenance testing |
| 2900306 | PLC-RPT-24DC/21AU | 1 Changeover Contact (1CO) | Gold-plated (AU, low-level) | Precision measuring equipment, sensitive signal switching |
| 2910524 | PLC-RPT-24DC/21-21AU/MS | 2 Changeover Contacts (2CO) | Gold-plated (AU), MS | Redundant low-level signal systems + debugging |
| 2900338 | PLC-RPT-24DC/21-21AU | 2 Changeover Contacts (2CO) | Gold-plated (AU) | Dual-channel low-level signal control |
| 2910519 | PLC-RPT-24DC/21-21/MS | 2 Changeover Contacts (2CO) | Manual Operation (MS) | Dual-channel control + on-site testing |
| 2909514 | PLC-RPT-24DC/21-21/EX | 2 Changeover Contacts (2CO) | Explosion-proof (EX) | Hazardous area dual-channel switching |
| 2900330 | PLC-RPT-24DC/21-21 | 2 Changeover Contacts (2CO) | Standard configuration | General dual-channel industrial control |
| 2909667 | PLC-RPT-24DC/21/MS | 1 Changeover Contact (1CO) | Manual Operation (MS) | Single-channel control + debugging |
| 1078683 | PLC-RPT-24DC/1ICT/ACT | 1 Normally Open (1NO) | Integrated Circuit Trigger (ICT), ACT function | PLC-controlled IC-triggered loads |
| 2900298 | PLC-RPT-24DC/1IC/ACT | 1 Normally Open (1NO) | Integrated Circuit (IC), ACT function | Compact IC-compatible load control |
| 2909678 | PLC-RPT-24DC/1AU/MS/SEN | 1 Normally Open (1NO) | Gold-plated (AU), MS, Sensor-compatible (SEN) | Sensor signal switching + manual override |
| 2909677 | PLC-RPT-24DC/1/MS/ACT | 1 Normally Open (1NO) | MS, ACT function | Simple load control + debugging |
| 1176847 | PLC-RPT-24DC/1-1/ACT | 2 Normally Open (2NO) | ACT function | Dual parallel NO load control |
Core Technical Specifications (Universal)
| Parameter | Value | Notes |
|---|---|---|
| Supply Voltage | 24V DC (20.9V~33.6V) | Dedicated 24DC input, anti-voltage fluctuation |
| Contact Materials | AgNi (standard)/AgSnO (HC)/Gold-plated AgNi (AU) | Match load type (high-power/low-level) |
| Maximum Switching Capacity | Standard: 250V/6A; HC: 250V/10A; AU: 30V/50mA | Load-dependent rating |
| Response Time | 3ms~15ms | Fast switching for high-speed control |
| Mechanical Life | 5×10⁶~3×10⁷ operations | High reliability, low maintenance |
| Insulation Strength | 4kV (coil-contact) | Anti-interference, protect PLC circuits |
| Connection Type | Push-in terminals | Tool-free, fast wiring (0.14~2.5mm² wires) |
| Mounting Type | 35mm DIN rail (NS 35/7.5) | Compact, zero-spacing arrangement |
| Protection Class | IP20 (base); RTIII (relay) | Dust-proof, cabinet-mounted |
| Operating Temperature | -40℃~70℃ | Adapt to extreme industrial environments |
Application Scenarios & Recommended Models
1. Safety-Critical Circuits
- Requirement: Forced-guided contacts, fail-safe protection
- Recommended Model: 2910537 (PLC-RPT-24DC/2X21/FG)
- Key Reason: FG contacts prevent contact welding, compliant with EN 61810-3 for safety loops (emergency stops, safety doors)
2. High-Power Load Control (≤10A)
- Requirement: High current capacity, optional manual operation
- Recommended Models: 2900291 (standard HC), 2910530 (HC+MS)
- Key Reason: AgSnO HC contacts handle 10A loads (solenoid valves, small motors); MS enables on-site debugging without power
3. Low-Level/Sensitive Signal Switching
- Requirement: Gold-plated contacts, anti-oxidation
- Recommended Models: 2900306 (21AU), 2910524 (21-21AU/MS)
- Key Reason: Gold-plated AU contacts reduce contact resistance, ideal for precision sensors or measuring equipment
4. Hazardous Area Applications
- Requirement: Explosion-proof design
- Recommended Model: 2909514 (PLC-RPT-24DC/21-21/EX)
- Key Reason: EX certification ensures safe operation in hazardous zones (e.g., chemical plants, oil refineries)
5. On-Site Debugging & Maintenance
- Requirement: Manual operation function
- Recommended Models: 2909667 (21/MS), 2910519 (21-21/MS)
- Key Reason: MS button allows contact activation without PLC signals, simplifying testing and troubleshooting
6. IC-Triggered or Sensor-Compatiable Loads
- Requirement: IC integration or sensor signal adaptation
- Recommended Models: 1078683 (1ICT/ACT), 2909678 (1AU/MS/SEN)
- Key Reason: ICT/ACT functions match PLC IC outputs; SEN variant is optimized for sensor signal switching
Core Advantages
- 24DC Dedicated: Optimized for 24V DC industrial power systems, stable and reliable
- Diverse Contact Options: Standard/HC/AU contacts cover high-power, low-level, and precision applications
- Functional Richness: Supports forced-guided safety, manual operation, and explosion-proof needs
- Easy Installation: Push-in wiring and DIN rail mounting save time and cabinet space
- Industrial-Grade Durability: Wide temperature range and high insulation strength resist harsh environments
Installation & Usage Notes
- Voltage Matching: Ensure supply voltage is 24V DC (20.9V~33.6V); avoid reverse polarity (built-in protection)
- Load Matching: Select contact type based on load (HC for >6A; AU for <50mA low-level signals)
- MS Function Use: Use manual operation (MS) only for debugging; avoid long-term manual activation
- Safety Wiring: For FG models (2910537), follow safety circuit design guidelines (separate safety/control wiring)
- EX Model Installation: Deploy 2909514 in compliance with ATEX/IECEx standards (proper grounding, zone restrictions)
- Wiring Care: Strip wires to 10mm, ensure full insertion into push-in terminals; use shielded cables for EMI-prone environments
Phoenix PLC-RPT Series: 24DC PLC Interface Relay Modules - Selection Guide
Created on：2025-11-17 11:18
