Phoenix PI-EX Series: Explosion-Proof Industrial Modules - Selection Guide
Product Overview
The Phoenix PI-EX Series consists of ATEX/IECEx-certified explosion-proof modules designed for safe operation in hazardous industrial environments (Zone 2/22). Covering functional categories including signal isolation, temperature acquisition, NAMUR sensor integration, digital I/O, power supply, and bus interface, these modules enable reliable signal processing, data transmission, and load control in explosive atmospheres. With robust industrial-grade construction, 35mm DIN rail mounting, and compliance with global 防爆 standards, they’re ideal for chemical plants, oil refineries, pharmaceutical facilities, and other scenarios requiring explosion-proof automation solutions.
Model Quick Reference Table
| Model No. | Product Name | Function Type | Core Features | Application Scenarios |
|---|---|---|---|---|
| 2835901 | PI-EX-TB | Explosion-Proof Terminal Block | Basic terminal connection for hazardous areas | Wiring distribution in Zone 2/22 environments |
| 2865298 | PI-EX-SD-24-48 | Explosion-Proof Power Supply | 24-48V DC output, explosion-proof design | Power supply for low-voltage devices in hazardous areas |
| 2835066 | PI-EX-RTD-I | RTD Temperature Input (Isolated) | Isolated RTD (PT100/PT1000) input | Isolated temperature monitoring in explosive zones |
| 2865311 | PI-EX-RTD | RTD Temperature Input | Non-isolated RTD input | Basic RTD temperature acquisition in Zone 2/22 |
| 2865243 | PI-EX-RPSS | Signal Isolation/Repeater | Signal amplification + isolation | Signal enhancement for long-distance transmission in hazardous areas |
| 2865117 | PI-EX-NAM/TO-P | NAMUR Sensor Interface (Plug-in) | Plug-in NAMUR sensor compatibility | Plug-and-play NAMUR sensor integration |
| 2835574 | PI-EX-NAM/TO | NAMUR Sensor Interface | Standard NAMUR (EN 60947-5-6) input | NAMUR proximity switches/sensors in explosive environments |
| 2835341 | PI-EX-NAM/RNO-NE | NAMUR Relay Output (NO, Non-Energized) | NAMUR-controlled NO output (non-energized) | NAMUR-triggered load control (normally open) |
| 2835053 | PI-EX-NAM/RNO | NAMUR Relay Output (NO) | NAMUR-controlled NO output | Standard NAMUR NO load switching |
| 2835367 | PI-EX-NAM/RNC-NE | NAMUR Relay Output (NC, Non-Energized) | NAMUR-controlled NC output (non-energized) | NAMUR-triggered load control (normally closed) |
| 2835794 | PI-EX-ME-RTD-I | Mixed RTD Input (Isolated) | Isolated multi-channel RTD input | Multi-point isolated temperature monitoring |
| 2835422 | PI-EX-ME-RPSS-I/I | Mixed Signal Isolator | Dual-channel isolated signal conversion | Dual-signal isolation/transmission in hazardous areas |
| 2835435 | PI-EX-ME-RPS-I/I | Mixed Signal Repeater | Dual-channel signal amplification | Dual-signal enhancement for long distances |
| 2835749 | PI-EX-ME-ID-UI-I | Mixed Digital-Analog Isolator | Digital input → analog output (isolated) | Digital-to-analog signal conversion in explosive zones |
| 2835480 | PI-EX-ME-2NAM/TO | Dual NAMUR Sensor Interface | 2-channel NAMUR input | Multi-NAMUR sensor integration (e.g., dual proximity switches) |
| 2865214 | PI-EX-MB-S/16-01-2/D-SUB | Bus Interface Module | D-SUB connector, 16-channel signal interface | Bus signal distribution via D-SUB in hazardous areas |
| 2835985 | PI-EX-MB-DI/16/FLK14/PLC/KD-S1 | Digital Input Bus Module | 16-channel DI, PLC-compatible | Large-scale digital signal acquisition in Zone 2/22 |
| 2835613 | PI-EX-IDS-I/I | Isolated Digital Signal Converter | Isolated digital signal conversion | Noise-free digital signal processing in explosive environments |
| 2835024 | PI-EX-ID-I/I | Isolated Digital Input | Isolated dual-channel DI | Isolated digital signal acquisition |
| 2835325 | PI-EX-ES-1/3 | Safety Switch Interface | 1-channel safety switch input | Safety interlock integration in hazardous areas |
| 2865120 | PI-EX-DO/REL-S | Explosion-Proof Relay Output | Relay-based DO, explosion-proof | Relay-controlled load switching in Zone 2/22 |
| 2865696 | PI-EX-AIS | Analog Input Sensor Interface | Isolated analog sensor input | Analog sensor (4-20mA/0-10V) integration in explosive zones |
Core Technical Specifications (Universal)
| Parameter | Value | Notes |
|---|---|---|
| Explosion Protection Certifications | ATEX/IECEx (Zone 2/22, II 3G/D) | Complies with global hazardous area standards |
| Supply Voltage | 24-48V DC (20.4~52.8V) | Wide voltage range for industrial use |
| Operating Temperature | -25℃~70℃ | Adapts to harsh hazardous environments |
| Mounting Type | 35mm DIN rail (NS 35/7.5) | Compact design, space-saving |
| Protection Class | IP20 (cabinet mounting) | Dust-proof, suitable for control cabinets in hazardous areas |
| Insulation Strength | 2kV (input-output-supply) | Anti-interference, ensures signal stability |
| Signal Compatibility | NAMUR (EN 60947-5-6), RTD (PT100/PT1000), 4-20mA/0-10V | Works with mainstream industrial sensors |
| Connection Type | Screw/Push-in terminals | Secure wiring for vibration-prone environments |
| Certifications | CE, UL, CSA, ATEX, IECEx | Global compliance for international deployment |
| Power Consumption | ≤1.5W (single-channel); ≤3W (multi-channel) | Low heat generation, safe in explosive atmospheres |
Application Scenarios & Recommended Models
1. Temperature Monitoring in Hazardous Areas
- Requirement: Isolated RTD input, multi-point acquisition
- Recommended Models: 2835066 (PI-EX-RTD-I, isolated), 2835794 (PI-EX-ME-RTD-I, multi-channel)
- Key Reason: RTD-specific design for PT100/PT1000 sensors; isolation prevents cross-interference in explosive zones
2. NAMUR Sensor Integration (Proximity Switches/Safety Sensors)
- Requirement: NAMUR-compliant interface, single/dual-channel
- Recommended Models: 2835574 (single-channel), 2835480 (dual-channel), 2865117 (plug-in)
- Key Reason: Complies with EN 60947-5-6 for NAMUR sensors; plug-in/dual-channel options fit diverse integration needs
3. Digital/Analog Signal Isolation & Conversion
- Requirement: Noise-free signal processing, long-distance transmission
- Recommended Models: 2835613 (PI-EX-IDS-I/I, digital), 2835749 (PI-EX-ME-ID-UI-I, digital-analog), 2865696 (PI-EX-AIS, analog)
- Key Reason: Isolation (2kV) eliminates electromagnetic interference; suitable for signal transmission in noisy hazardous environments
4. Large-Scale Digital Input Acquisition
- Requirement: 16-channel DI, PLC compatibility
- Recommended Model: 2835985 (PI-EX-MB-DI/16/FLK14/PLC/KD-S1)
- Key Reason: High-channel density reduces cabinet space; direct PLC integration simplifies system design
5. Power Supply for Hazardous Area Devices
- Requirement: Explosion-proof power delivery (24-48V DC)
- Recommended Model: 2865298 (PI-EX-SD-24-48)
- Key Reason: Explosion-proof design ensures safe power supply for low-voltage devices (sensors, modules) in Zone 2/22
6. Safety Interlock & Relay Control
- Requirement: Safety switch interface, relay output
- Recommended Models: 2835325 (PI-EX-ES-1/3, safety switch), 2865120 (PI-EX-DO/REL-S, relay output)
- Key Reason: Safety-focused design for interlocks; relay output enables safe load switching in explosive atmospheres
Core Advantages
- Global Explosion-Proof Compliance: ATEX/IECEx certifications (Zone 2/22) ensure safe operation in explosive atmospheres
- Multifunctional Integration: Covers temperature acquisition, NAMUR integration, signal isolation, I/O, and power supply in one series
- High Isolation Performance: 2kV insulation prevents signal interference and electrical hazards in harsh environments
- Wide Sensor Compatibility: Works with NAMUR sensors, RTDs, analog/digital sensors, and safety switches
- Rugged & Reliable: Wide operating temperature range (-25℃~70℃) and vibration-resistant design for hazardous area conditions
- Easy System Integration: PLC-compatible, bus-ready, and standard mounting/wiring simplify deployment
Installation & Usage Notes
- Explosion-Proof Compliance: Strictly follow ATEX/IECEx guidelines (e.g., correct zoning, grounding, cable gland selection)
- Voltage Matching: Ensure supply voltage matches module ratings (24-48V DC); avoid overvoltage in unstable power grids
- Wiring Specifications: Use explosion-proof cable glands and shielded cables; separate power and signal wiring to reduce interference
- Module Spacing: Reserve ≥10mm between modules for heat dissipation (critical in enclosed hazardous area cabinets)
- Sensor Compatibility: Verify sensors meet NAMUR/EN 60947-5-6 standards (for NAMUR modules) or RTD/analog specifications
- Maintenance: Perform inspections in non-explosive atmospheres; avoid hot work near modules during operation
- Certification Verification: Confirm module certifications match the site’s hazardous area classification (Zone 2/22)
Phoenix PI-EX Series: Explosion-Proof Industrial Modules - Selection Guide
Created on：2025-11-18 16:34
