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Phone: +86 16626708626Description
| Specification | Value / Range / Description |
|---|---|
| Module Type | Redundancy CPU (RX3i) |
| CPU Speed | 1.0 GHz (Celeron-M) |
| Memory | 64 MB battery-backed RAM + 64 MB nonvolatile flash |
| Serial Ports | 2 (RS-232, RS-485) |
| Supported Protocols | SNP, Serial I/O, Modbus RTU (master/slave) |
| Switchover Time | Maximum: 1 logic scan; Minimum: 3.133 ms |
| Sync Modules | IC695RMX128 / RMX228 / CMX exchange modules |
| Firmware Revision (EN) | 7.75 (May 2013) |
| PROFINET Support (later FW) | Available in ES/EV/EW versions for remote I/O |
| Backplane Compatibility | RX3i universal backplane; supports local and remote racks |
| Expansion Support | Local and remote I/O, Series 90-30 expansion racks (remote) |
| Power Requirements | ~1.0 A at 3.3 V, ~1.2 A at 5 V |
| Operating Temperature | 0 °C to 60 °C |
| LEDs / Indicators | CPU OK, Run, Outputs Enabled, I/O Force, Sys Fault, Battery, COM1/COM2 |
| Isolation / Noise Tolerance | Standard PACSystems design environments |
| Certifications / Standards | Matches RX3i family environmental and safety specs |
Product Model: IC695CRU320-EN
Product Brand: GE Fanuc / Emerson PACSystems
Product Series: RX3i / CRU (Redundant CPU)
Product Features:
- 1 GHz Intel Celeron-M processor, two serial ports (RS-232, RS-485)
- Hot standby CPU redundancy (switchover in ≤1 logic scan)
- 64 MB battery-backed RAM + 64 MB nonvolatile flash memory
- Supports PROFINET remote I/O, synchronization modules (RMX/CMX)
- IC695CRU320-EN
- IC695CRU320-EN
Applications & Industry Context
In mission-critical plants such as chemical processing, power generation, or oil & gas, unplanned downtime is extremely costly. In those environments, control redundancy is not a nice-to-have — it’s a necessity. The IC695CRU320-EN becomes the core of a redundant PACSystems RX3i architecture, set up so that two CPUs operate in lockstep: one active, one standby. If the active unit fails, the partner takes over in less than a logic scan. With that kind of robustness, operators can maintain continuous operation even during component faults.
Consider a refinery fractionation column control system: analog loops measuring temperature, pressure, flow, and level are processed by I/O modules. The IC695CRU320-EN orchestrates those I/O, issues control outputs, and exchanges data with SCADA or redundant network paths. In such settings, PROFINET remote I/O is sometimes required; the CRU320 supports that when firmware is up to version 8.x or later.
In high-availability water or wastewater plants, redundancy ensures that primary control logic never stops and transitions happen transparently. Many experienced system integrators tell me they’ve retrofitted simplex CPU racks into redundant pairs using CRU modules, thereby eliminating controller downtime during maintenance or failures.
