Phoenix RIF-0 Series: Industrial Interface Relay Modules - Selection Guide

Product Overview

The Phoenix RIF-0 Series consists of compact industrial interface relays designed for signal conversion and load control in automation systems. Covering two core sub-series (RSC/RPT) with control voltages of 12V DC and 24V DC, these modules feature flexible contact configurations (1CO/2CO) and functional variants (gold-plated contacts, manual operation, male connector). With a space-saving design, robust industrial construction, and reliable electrical isolation, they bridge PLC outputs with external devices—ideal for sensor signal switching, low-level signal transmission, and general-purpose load control in manufacturing, process automation, and control cabinet applications.

Model Quick Reference Table

1. RSC Sub-Series Interface Relays

2. RPT Sub-Series Interface Relays

Core Technical Specifications (Universal)

Application Scenarios & Recommended Models

1. Low-Level Signal Switching

• Requirement: Precision sensor or measuring equipment signal control (24V DC, 2-channel)

• Recommended Model: 2903372 (RIF-0-RSC-24DC/21AU)

• Key Reason: Gold-plated (AU) contacts reduce contact resistance, ideal for low-voltage/current signals

• Requirement: 12V DC single-channel low-level signal switching

• Recommended Model: 2903369 (RIF-0-RPT-12DC/21AU)

• Key Reason: 12V DC compatibility + AU contacts for sensitive 12V sensors

2. General-Purpose Load Control

• Requirement: 24V DC 2-channel general load control (valves, relays)

• Recommended Models: 2903374 (RSC-24DC/21), 2903370 (RPT-24DC/21)

• Key Reason: Standard AgNi contacts handle 6A AC/3A DC loads; 2CO configuration for dual-load control

• Requirement: 12V DC single-channel basic switching

• Recommended Models: 2903367 (RSC-12DC/1), 2903362 (RPT-12DC/1)

• Key Reason: Cost-effective standard design for non-sensitive 12V DC loads

3. On-Site Debugging & Maintenance

• Requirement: 24V DC 2-channel control with manual operation (for testing)
• Recommended Model: 1550107 (RIF-0-RPT-24DC/21/MS)
• Key Reason: MS (Manual Operation) function enables testing without PLC signals, simplifying troubleshooting

4. Male Connector Fast Wiring

• Requirement: 24V DC 2-channel control with plug-in male connector
• Recommended Model: 2908327 (RIF-0-RPT-M-24DC/21)
• Key Reason: Male connector (M) supports tool-free fast wiring, ideal for modular systems

Core Advantages

• Compact Design: 6.2mm (1CO) / 12.4mm (2CO) width saves critical control cabinet space
• Dual Sub-Series Flexibility: RSC/RPT variants fit different wiring and functional needs
• Low-Level Signal Compatibility: AU-suffixed gold-plated contacts for sensitive sensor signals
• Wide Voltage Support: 12V DC/24V DC control voltages match industrial standard power supplies
• Industrial-Grade Reliability: -25℃~70℃ operating temperature and 4kV insulation strength
• Easy Installation: DIN rail mounting and secure screw/male connector wiring
• Cost-Effective Options: Standard (non-AU) models for general loads; AU variants for precision applications

Installation & Usage Notes

• Voltage Matching: Ensure control voltage aligns with module ratings (12DC vs. 24DC) to avoid coil damage
• Contact Load Matching: Use AU models for <50mA low-level signals; standard models for ≤6A AC/3A DC general loads
• Wiring Specifications: For screw terminals, strip wires to 7mm and tighten to 0.5~0.6Nm; use 0.14~2.5mm² conductors
• Mounting Spacing: Reserve ≥3mm between modules for heat dissipation (critical in dense cabinet layouts)
• Manual Operation (MS): Use MS models only for debugging; avoid long-term manual activation to prevent contact wear
• Polarity Attention: DC control coils require correct polarity (no reverse polarity protection—check wiring before power-on)
• Environmental Protection: Install in dry, dust-free control cabinets (IP20 protection); avoid direct exposure to moisture