GE IC695CRU320 PACSystems RX3i Hot‑Standby Redundancy CPU Controller

Description

Hardware & Electrical Specifications

‑ Model: IC695CRU320 ‑ Part Number: IC695CRU320 ‑ Module Type: RX3i Hot‑Standby Redundancy CPU Controller, occupies 2 consecutive slots on universal backplane ‑ Mounting: Main‑rack universal backplane IC695CHS series only; cannot install on expansion backplane ‑ Backplane power consumption:  • +3.3 VDC: 1000 mA nominal  • +5 VDC: 1200 mA nominal ‑ Processor: 1 GHz Intel Celeron‑M ‑ User memory: 64 MB battery‑backed SRAM + 64 MB non‑volatile Flash memory ‑ Logic execution speed: 0.047 ms / 1000 Boolean instructions typical ‑ Redundancy switchover: Hot‑standby mode, bumpless transfer, min 3.133 ms, max one logic scan cycle ‑ I/O capacity:  • Discrete %I / %Q: 32 K bits  • Analog %AI / %AQ: 32 K words each ‑ Program blocks: Max 512 blocks; each block maximum size 128 KB ‑ On‑board communication interfaces:  • COM1: RS‑232 (9‑pin D‑sub), SNP‑Slave, Modbus‑RTU Slave  • COM2: RS‑485 half‑duplex (15‑pin D‑sub), Modbus‑RTU Master/Slave, SNP‑Slave ‑ Ethernet: No onboard port; requires separate IC695ETM001 Ethernet module ‑ Redundancy accessory requirement: IC695RMX128 / IC695RMX228 reflective memory modules for redundancy link ‑ Required battery accessory: IC695ACC302 smart lithium battery module for SRAM data retention and RTC clock ‑ RTC real‑time clock: Max drift 2 seconds per day; typical lithium‑battery service life 5 years ‑ Expansion capacity: Maximum 8 local expansion racks ‑ Diagnostics: CPU hardware self‑test, backplane bus fault, I/O fault monitoring, memory ECC error detection, redundancy synchronization status diagnosis ‑ PCB treatment: Conformal coated for dust, moisture and corrosion resistance ‑ Compatibility note: CPU hot‑swap is forbidden. Verify total backplane power budget before installation. Legacy Series‑90‑30 modules are supported with restrictions, refer to manual GFK‑2514. Redundancy transfer‑list must be well configured to avoid state‑loss during switchover. Full system download and redundancy switchover validation test must be performed after replacement.

Environmental Specifications

‑ Operating temperature: 0 ℃ ~ +60 ℃ ‑ Storage temperature: ‑40 ℃ ~ +85 ℃ ‑ Relative humidity: 5%‑95% non‑condensing ‑ Installation location: Indoor control cabinet, IP20 protection class ‑ EMC compliance: IEC 61000‑6‑2 ‑ Certifications: CE, UL Class I Div 2 hazardous‑location certification

Mechanical Data

‑ Weight: approx 1.05 kg (2.31 lbs) ‑ Dimension: RX3i dual‑slot CPU module form‑factor ‑ Handling note: ESD‑sensitive high‑speed processor circuitry. Periodically inspect smart lithium‑battery aging status. No onboard USB port.

Main Functions

1. High‑availability main processing unit for RX3i hot‑standby redundant automation system. Executes IEC 61131‑3 user logic, floating‑point arithmetic, handles local and expansion‑rack I/O via dual PCI / serial backplane bus. Synchronizes runtime data with standby CPU through reflective‑memory link, achieves bumpless automatic switchover upon active‑CPU fault.
2. Two onboard serial ports for Modbus‑RTU field instruments and SNP communication. Ethernet functions are realized by external ETM001 module for SCADA, Modbus‑TCP and EGD data exchange.
3. Program and configuration stored in non‑volatile flash; runtime process data maintained by battery‑backed SRAM. Supports in‑system firmware upgrade for CPU and other backplane modules.
4. Front‑panel LED indicators:   ‑ Green CPU OK: CPU hardware normal status   ‑ Red SYS FLT: Hardware / memory / configuration / redundancy sync fault   ‑ Green RUN: User program executing   ‑ OUTPUTS ENABLED: Output scan active   ‑ I/O FORCE: I/O force function active   ‑ BATTERY: Low battery alarm   ‑ COM1 / COM2: Serial communication activity status

Installation & Wiring Requirements

1. Cut off full rack power supply before replacement. CPU hot‑swap is strictly forbidden. ESD protection must be applied during module handling.
2. Insert IC695CRU320 into two consecutive slots of RX3i universal main‑rack backplane and engage locking latches. Install IC695ACC302 smart battery module. Mount IC695RMX reflective‑memory modules for redundancy link according to redundancy system layout.
3. Serial wiring comply with GE RX3i hardware manual. Use shielded twisted‑pair for RS‑485 bus; install terminating resistor at bus end. Reliable protective‑ground connection is required. Install IC695ETM001 module on backplane if Ethernet communication is required.
4. After replacement: Power‑on rack power, check CPU front‑panel LED status. Download hardware configuration and user application program, configure redundancy transfer‑list in Proficy Machine Edition. Complete I/O mapping validation, communication link tests and manual redundancy switchover test.
5. Replacement note: Confirm backplane provides sufficient 3.3 V / 5 V current capacity. Inspect battery health status. Verify redundancy synchronization and bumpless switchover performance. Full‑system commissioning test is mandatory before putting into service.