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Phone: +86 16626708626Description
3. Key Technical Specifications
- Function: Cnet-to-HCU Network Interface Slave
- Communication: INFI-NET compatible, dual independent channels
- System Capability: Supports large node counts in INFI 90 OPEN systems
- Connections: Up to 32 connections per module
- Power Requirements: +5 VDC at 825 mA typical (4.1 W) to 1.1 A (5.5 W)
- Microprocessor: Onboard processing for network traffic
- Mounting: Standard Infi 90 module slot
- Dimensions: 17.8 cm x 5.1 cm x 33.0 cm
- Weight: Approx. 0.23 kg
- Revision: Typically Rev. E or later in field stock
4. Product Introduction
The ABB INNIS21 is a Network Interface Slave Module for the Infi 90 and Symphony systems. It provides the Cnet-to-HCU communication link, enabling data exchange between the control network and Harmony control units.
This module is commonly used in expansions or upgrades of existing INFI 90 installations where reliable network bridging is required. It handles the protocol conversion and traffic management needed to keep multiple nodes synchronized across the plant.
- INNIS21
- INNIS21
5. Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| No network communication | Cable fault or incorrect node addressing | ✅ High | Verify INFI-NET cabling and module LEDs for link status | Check coaxial or fiber connections and termination |
| High error rates on network | Noise, grounding issues, or overload | ✅ Medium | Monitor network diagnostics in controller | Improve cable routing, grounding, and segment loading |
| Module not detected in rack | Backplane power or seating problem | ❌ Low | Confirm +5 VDC at module and reseat firmly | Verify rack power supply health |
| Intermittent dropouts | Firmware mismatch or configuration error | ✅ High | Compare firmware and network parameters | Align settings with master node configuration |
| Overheating or high current | Internal fault or environmental stress | ✅ Medium | Measure ambient temp and power draw | Ensure proper ventilation and check for damage |
Capture network diagnostic logs and LED status before reaching out to support for persistent network issues.
6. Frequently Asked Questions (FAQ)
What systems does the INNIS21 work with? It is designed for Bailey Infi 90 and Symphony Harmony systems, specifically for Cnet-to-HCU interfacing in INFI-NET environments.
Is this module required for basic Infi 90 operation? No. It is used when you need additional network slave interfaces or to connect specific HCU segments to the main control network.
Can multiple INNIS21 modules be used in one rack? Yes, depending on rack capacity and overall network design. Coordinate with your system architecture to avoid bus loading problems.
Does it support redundancy? Network redundancy is typically handled at the system level with dual paths. Individual module redundancy follows standard Infi 90 practices.
What power does it draw? +5 VDC at approximately 825 mA to 1.1 A depending on traffic load. Factor this into your rack power budget with headroom.
How is the INNIS21 tested before shipment? Units are powered up in a test rack, run network ping and data transfer simulations, and checked for stable communication over extended periods. Test summary provided.
Lead time and condition? New Surplus stock generally ships quickly. All units receive full functional verification and come with our standard 1-year warranty.
