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3. Key Technical Specifications
- Slots: 17 total (dual sections with power supply slots)
- Configuration: Redundant rack, rear mount
- Power Supply Slots: 2 (one per section)
- Module Slots: Supports standard Series 90-70 and VME modules
- Mounting: Panel / rear mount
- Dimensions: Standard 19-inch rack compatible footprint
- Operating Temperature: 0 to 60°C
- Compatibility: Series 90-70 redundant CPU systems
- Backplane: Dual independent sections for redundancy
4. Product Introduction
The GE IC697CHS770 is a 17-slot redundant rack for the Series 90-70 PLC system. It features two separate power supply slots and backplane sections designed for hot standby redundancy applications.
This rack is built for high-availability control systems where downtime must be minimized. It accepts standard Series 90-70 modules and certain VME modules in the available slots.
5. Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| One side not powering up | Failed power supply | ✅ High | Measure voltage on each power supply | Replace faulty power supply |
| Modules in one section offline | Loose backplane connections | ✅ High | Inspect module seating and bus connectors | Reseat modules and check cables |
| Redundancy switchover fails | Configuration or cable issue | ✅ High | Check RCM and BTM module connections | Verify redundancy cables and config |
| Overheating | Poor ventilation or overload | ✅ Medium | Monitor temperatures in enclosure | Improve airflow or reduce load |
| Intermittent faults | Grounding problems | ✅ Medium | Verify all grounding points | Ensure proper system grounding |
Contact technical support with photos of both rack sections, power supply status, and redundancy diagnostics if issues continue.
- IC697CHS770
6. Frequently Asked Questions (FAQ)
What makes the IC697CHS770 a redundant rack? It has two independent power supply slots and backplane sections. This allows installation of redundant CPUs and power supplies for hot standby operation.
How many modules can I install? The rack provides slots for power supplies plus multiple double-wide module positions split across the redundant sections. Exact count depends on module sizes.
Is this rack compatible with RX3i modules? No. It is designed exclusively for the Series 90-70 platform. Use RX3i racks for RX3i systems.
Can I mount this rack in a standard 19-inch cabinet? Yes. It is a rear-mount design suitable for standard industrial enclosures.
Do I need special cables for redundancy? Yes. Redundancy requires specific cables between the Redundancy Communications Module (RCM) and Bus Transmitter Module (BTM) in the redundant setup.
Why buy New Surplus for legacy Series 90-70 hardware? These racks are genuine OEM stock for maintaining or expanding existing 90-70 systems. They are tested and provide immediate availability where new production has long lead times or is discontinued.
What should I check before installing? Verify total power requirements for all planned modules, confirm proper grounding, and document the existing rack layout and cable connections before any swap.
