Phoenix ILB Series: Industrial Bus Interface I/O Modules - Selection Guide
Product Overview
The Phoenix ILB Series comprises compact industrial bus interface modules designed for distributed automation systems. Supporting multiple bus protocols (S3, PROFINET/PN, PROFIBUS/PB, IB) and diverse I/O configurations (digital DI/DO/DIO, analog AI/AO), these modules enable remote signal acquisition, control, and data transmission between field devices and control systems (PLC/DCS). Featuring 24V DC power supply, 35mm DIN rail mounting, and optional interfaces (e.g., D-SUB) or error feedback (EF) functions, they’re ideal for process control, manufacturing lines, and distributed automation scenarios requiring reliable bus-based I/O expansion.
Model Quick Reference Table
| Model No. | Product Name | Bus Protocol | I/O Configuration | Key Features | Application Scenarios |
|---|---|---|---|---|---|
| 2692076 | ILB S3 AI4 AO2-2TX | S3 | 4 Analog Input (AI) / 2 Analog Output (AO) | 2×Ethernet ports (2TX) | S3 bus-based analog signal acquisition/control |
| 2700174 | ILB S3 24 DI8 DO4 AO2 INC-IN2 | S3 | 8DI / 4DO / 2AO / 2 Incremental Encoder Input | Integrated encoder interface | S3 bus distributed control with motion feedback |
| 2897570 | ILB S3 24 DI16 DIO16-2TX | S3 | 16DI / 16 Bidirectional I/O (DIO) | 2×Ethernet ports, dual I/O types | S3 bus high-density mixed I/O systems |
| 2702289 | ILB PN 24 DI16 DIO16-EF | PROFINET | 16DI / 16DIO | Error Feedback (EF), PROFINET compatibility | PROFINET distributed I/O with fault diagnosis |
| 2878146 | ILB PN 24 DI16 DIO16-2TX | PROFINET | 16DI / 16DIO | 2×Ethernet ports, redundant communication | PROFINET high-reliability mixed I/O systems |
| 2878874 | ILB PB AI4 AO2 | PROFIBUS (PB) | 4AI / 2AO | PROFIBUS analog signal processing | PROFIBUS-based analog data acquisition |
| 2862408 | ILB PB 24 DO32 | PROFIBUS (PB) | 32 Digital Output (DO) | High-density DO, PROFIBUS compatibility | PROFIBUS large-scale output control |
| 2862398 | ILB PB 24 DI32 | PROFIBUS (PB) | 32 Digital Input (DI) | High-density DI, PROFIBUS compatibility | PROFIBUS large-scale input acquisition |
| 2862411 | ILB PB 24 DI16 DO16 | PROFIBUS (PB) | 16DI / 16DO | Balanced DI/DO, PROFIBUS compatibility | PROFIBUS standard mixed I/O systems |
| 2863562 | ILB PB 24 DI8 DIO8 | PROFIBUS (PB) | 8DI / 8DIO | Compact mixed I/O, PROFIBUS compatibility | Space-constrained PROFIBUS I/O expansion |
| 2878777 | ILB IB AI4 AO2 | IB Bus | 4AI / 2AO | IB bus analog signal processing | IB bus-based analog data acquisition |
| 2862369 | ILB IB 24 DO32 | IB Bus | 32DO | High-density DO, IB bus compatibility | IB bus large-scale output control |
| 2878528 | ILB IB 24 DO16-DSUB | IB Bus | 16DO | D-SUB interface, IB bus compatibility | IB bus DO control with D-SUB connections |
| 2862356 | ILB IB 24 DO16 | IB Bus | 16DO | Standard 16DO, IB bus compatibility | IB bus standard output control |
| 2862343 | ILB IB 24 DI32 | IB Bus | 32DI | High-density DI, IB bus compatibility | IB bus large-scale input acquisition |
| 2878625 | ILB IB 24 DI16 DO16-DSUB | IB Bus | 16DI / 16DO | D-SUB interface, IB bus compatibility | IB bus mixed I/O with D-SUB connections |
| 2862385 | ILB IB 24 DI16 DO16 | IB Bus | 16DI / 16DO | Balanced DI/DO, IB bus compatibility | IB bus standard mixed I/O systems |
| 2862330 | ILB IB 24 DI16 | IB Bus | 16DI | Standard 16DI, IB bus compatibility | IB bus standard input acquisition |
| 2862372 | ILB IB 24 DI8 DO8 | IB Bus | 8DI / 8DO | Compact 8DI/8DO, IB bus compatibility | Space-constrained IB bus I/O expansion |
Core Technical Specifications (Universal)
| Parameter | Value | Notes |
|---|---|---|
| Bus Compatibility | S3, PROFINET, PROFIBUS (PB), IB Bus | Protocol-specific models (see table) |
| Supply Voltage | 24V DC (20.4~28.8V) | Industrial standard power supply |
| I/O Electrical Ratings | DI: 24V DC (sinking/sourcing); DO: 24V DC, 0.5A per channel | Standard industrial I/O specs |
| Analog Signal Range | AI: 4-20mA/0-10V; AO: 4-20mA/0-10V (configurable) | Universal analog signal compatibility |
| Communication Speed | PROFINET: Up to 100Mbps; PROFIBUS: Up to 12Mbps | Protocol-dependent |
| Operating Temperature | -25℃~70℃ | Adaptable to harsh industrial environments |
| Mounting Type | 35mm DIN rail (NS 35/7.5) | Compact design, space-saving |
| Protection Class | IP20 (cabinet mounting) | Dust-proof, protects against solid objects ≥12mm |
| Insulation Strength | 2kV (I/O-circuit to supply) | Anti-interference, ensures signal stability |
| Connection Type | Screw terminals / D-SUB (model-dependent) | Secure or pluggable wiring |
| Certifications | CE, UL, CSA | Global industrial compliance |
| Power Consumption | ≤5W (analog modules); ≤3W (digital modules) | Low heat generation for dense layouts |
Application Scenarios & Recommended Models
1. PROFINET Distributed I/O Systems
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Requirement: High-density mixed I/O + redundant communication
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Recommended Model: 2878146 (ILB PN 24 DI16 DIO16-2TX)
-
Key Reason: 16DI/16DIO high density + 2×Ethernet ports for redundant PROFINET communication
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Requirement: Mixed I/O + fault diagnosis
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Recommended Model: 2702289 (ILB PN 24 DI16 DIO16-EF)
-
Key Reason: EF (Error Feedback) function simplifies PROFINET network troubleshooting
2. PROFIBUS Large-Scale I/O Expansion
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Requirement: 32-channel high-density DI/DO
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Recommended Models: 2862398 (DI32), 2862408 (DO32)
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Key Reason: High-channel density reduces cabinet space for large-scale PROFIBUS systems
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Requirement: Analog signal processing + standard mixed I/O
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Recommended Models: 2878874 (AI4 AO2), 2862411 (DI16 DO16)
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Key Reason: Analog/digital integration meets comprehensive PROFIBUS I/O needs
3. IB Bus Distributed Automation
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Requirement: D-SUB interface-compatible mixed I/O
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Recommended Model: 2878625 (ILB IB 24 DI16 DO16-DSUB)
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Key Reason: D-SUB connector enables quick connection to D-SUB-equipped devices
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Requirement: Compact 8-channel mixed I/O (space-constrained)
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Recommended Model: 2862372 (ILB IB 24 DI8 DO8)
-
Key Reason: Compact design fits narrow control cabinets for IB bus systems
4. S3 Bus Motion Control Integration
- Requirement: I/O + encoder feedback for motion control
- Recommended Model: 2700174 (ILB S3 24 DI8 DO4 AO2 INC-IN2)
- Key Reason: Integrated incremental encoder input supports S3 bus motion control applications
5. General-Purpose Bus I/O Expansion
- Requirement: Balanced 16DI/16DO for standard automation
- Recommended Models: 2862385 (IB), 2862411 (PB)
- Key Reason: Balanced I/O configuration fits most general industrial control needs
Core Advantages
- Multi-Protocol Support: Covers S3, PROFINET, PROFIBUS, IB Bus, adapting to diverse industrial networks
- Flexible I/O Configurations: High-density (32-channel) to compact (8-channel) options, plus analog/mixed I/O
- Diverse Interfaces: Screw terminals and D-SUB connectors for different wiring needs
- Reliable Performance: Wide temperature range, high insulation strength, and fault feedback (EF) for PROFINET
- Space-Saving Design: Compact DIN rail mounting maximizes control cabinet utilization
- Easy Integration: Plug-and-play bus compatibility simplifies connection to existing bus systems
Installation & Usage Notes
- Bus Matching: Ensure module protocol matches the network (e.g., PROFINET models for PROFINET networks)
- Voltage Matching: Power modules with 24V DC (20.4~28.8V) to avoid malfunctions
- I/O Wiring: Match DI/DO wiring to sinking/sourcing requirements; use shielded cables for analog signals
- D-SUB Model Handling: For D-SUB variants (e.g., 2878528), use compatible D-SUB cables and secure connections
- Mounting Spacing: Reserve ≥5mm between modules for heat dissipation, especially for high-density models
- Ethernet Redundancy: For PROFINET 2TX models, configure dual Ethernet ports for redundant communication
- Signal Isolation: In EMI-prone environments, use shielded cables and separate power/signal wiring
Phoenix ILB Series: Industrial Bus Interface I/O Modules - Selection Guide
