The GE Fanuc IC695CRU320, also cataloged as the IC695CRU320 Redundancy CPU Module, operates as a dedicated hardware component for high-availability logic processing and redundant bus control within PACSystems RX3i control platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | IC695CRU320 |
| Brand | GE Fanuc / Emerson |
| Product Line | PACSystems RX3i |
| Product Type | Redundancy CPU Modules |
| Microprocessor | Celeron M (1.0 GHz) |
| Slot Width | 2 Slots |
| User Memory | 64 MB battery-backed RAM / 64 MB non-volatile flash |
| Serial Interfaces | 2 Ports (RS-232 and RS-485 standards) |
| Switchover Execution Time | Minimum 3.133 ms, maximum 1 logic scan |
| Max Program Blocks | 512 |
| Maximum Block Size | 128 kB |
| Battery Compatibility | IC695ACC302 Lithium Smart Battery / IC693ACC302 Series 90-30 Auxiliary Battery |
| Power Consumption | 1.0 A at 3.3 VDC, 1.2 A at 5 VDC |
| Operating Temp | 0 to 60 deg C |
| Weight | 2.06 lbs (0.94 kg) |
| Dimensions | Standard 2-slot RX3i module width |
| Origin | USA / As specified on hardware label |
Firmware Flash Compatibility and Redundant Synchronization
The IC695CRU320 features dual-bus communications and deterministic execution routines to manage real-time CPU redundancy synchronization. Precise lockstep execution between primary and backup processors is controlled via dedicated redundancy links. System stability relies on strict firmware flash compatibility across primary and secondary units to guarantee fault-tolerant memory image transfers. Execution switchover occurs within a minimum of 3.133 ms or a maximum duration of 1 logic scan without interrupting local I/O execution.
Frequently Asked Questions
Q: What power bus draw does the IC695CRU320 demand from the backplane?
A: The processor draws 1.0 A at 3.3 VDC and 1.2 A at 5 VDC from the backplane power supply. Ensure total backplane power allocation accommodates these ratings alongside installed option modules.
Q: How is non-volatile application memory preserved during an extended main power outage?
A: The module relies on either an IC695ACC302 Lithium Smart Battery or an IC693ACC302 auxiliary battery module to maintain the 64 MB volatile RAM state during total system power loss.
Field Installation Guidelines
- Ensure backplane power is fully disconnected before seating or removing the IC695CRU320 module. Hot-swapping CPU processors is prohibited to avoid backplane bus corruption.
- Fully seat the 2-slot module into its assigned rack slots, tightening the top and bottom retaining screws to secure mechanical grounding to the rack chassis.
- Install dedicated RS-232 or RS-485 serial cables using shielded twisted-pair (STP) wiring, routing signal conductors away from high-voltage AC motor drives and power lines.
- Connect the battery module to the front-panel connector prior to system commissioning to ensure uninterrupted backup power for volatile memory.
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