Product Core Brief
- Model:
- Brand: GE
- Series: PACSystem RX3i
- Core Function: Executes IEC control logic and manages Ethernet, serial and USB communications for RX3i rack systems.
- Product Type: PLC CPE Processor Module
- Key Specs: 10MB Flash User Memory | Single 10/100 Ethernet | RS232 + RS485 Serial Ports Note: Active hardware series; factory new and tested surplus inventory circulate in global automation supply channels. The -ACAT suffix denotes a specific hardware build variant.
Key Technical Specifications
- Processor Clock Speed: 1.1 GHz Intel Atom
- User Program & Data Flash Memory: 10 MB
- Boolean Execution Speed: 0.072 ms per 1000 boolean instructions
- Backplane Bus: 10 Mbps RX3i PCI universal backplane
- Interfaces: 1×10/100 Mbps Ethernet, 1×RS232, 1×RS485, 1×USB Master
- Supported Protocols: SRTP, Modbus TCP, EGD, Modbus RTU, SNP
- Maximum I/O Capacity: 32,768 discrete points | 32,768 analog channels
- Operating Temperature: 0°C to 60°C (horizontal cabinet mounting)
- Storage Temperature: -40°C to 85°C
- Power Draw: 1.0 A @3.3VDC, 1.0 A @5VDC (USB unloaded)
- Form Factor: Single-width RX3i backplane module
- Optional Accessory: IC695ACC400 Energy Pack for power-fail memory write
Product Introduction
This unit serves as a mid-tier controller for PACSystem RX3i racks, combining onboard Ethernet, dual serial ports and a USB port for flexible programming and field device connectivity. It supports all standard IEC 61131-3 programming languages for discrete and batch automation workflows.
The integrated USB master port allows program uploads via flash storage without a direct PC connection, simplifying commissioning and offline logic updates for remote machine installations.
QA & Testing SOP (Transparency Building)
- Incoming Inspection: Verify part marking, serial traceability and housing integrity. Inspect edge connector pins for bending or corrosion; cross-check labeling against OEM datasheet specifications.
- Live Testing: Install into validated RX3i rack, apply 24VDC power. Complete Ethernet and serial comms handshake, maintain continuous 24-hour logic load cycling.
- Electrical Testing: Use Fluke 115 to monitor supply rail stability. Insulation resistance tests must register above 10MΩ between signal circuits and protective ground.
- Firmware/Config Backup: Record exact firmware revision. Capture photos of all DIP switch settings before clearing stored controller configuration.
- Final QC & Packaging: Seal inside anti-static shielding. Attach dated QC test tag with technician ID and test timestamp prior to shipment.
Installation Pitfalls & Guide (Engineer to Engineer)
❗ Firmware Rev Mismatch: Older RX3i backplane hardware cannot run newer firmware builds. Version incompatibility triggers intermittent Ethernet dropouts and backplane scan faults. Confirm compatibility before initiating flash updates. ❗ DIP Switch/Jumper Errors: Photograph switch positions on the existing unit before removal. Misconfigured switches alter default Ethernet IP and disable serial fallback programming access. ❗ Port Misuse: The single Ethernet port cannot perform internal network switching. Daisy-chaining multiple devices directly to this port creates packet collisions and communication latency. ❗ ESD Dangers: Un-grounded handling introduces latent silicon damage. Static failures often surface weeks after installation with no visible external damage to the housing or PCB. ❗ Energy Pack Configuration: If deployed with an IC695ACC400 energy pack, incorrect wiring prevents non-volatile memory saves during unexpected power loss.
Replacement Guide:
- Pre-install: Execute lockout-tagout, back up the running program, photograph wiring and switch positions.
- Removal: Release module latches, slide unit straight out; avoid twisting edge connectors to prevent pin deformation.
- Install: Align module with rack guides, fully seat and lock latches; replicate all documented switch settings.
- Power-on Test: Restore rack power, monitor status LEDs, download saved program and validate Ethernet and serial communications.
FAQ (Frequently Asked Questions)
Q: Does this unit support hot-swapping? A: No. It occupies a primary backplane slot. Hot removal disrupts the rack control bus and can damage adjacent I/O modules. Full rack shutdown is mandatory for replacement.
Q: Can programs migrate directly from other RX3i controllers? A: Most logic transfers without edits. Hardware configuration must be revalidated. Differences in firmware revision can trigger minor runtime diagnostic faults requiring adjustment.
Q: What software is required for programming? A: Proficy Machine Edition is the official programming platform. Match software version to the controller firmware revision to avoid connection failures.
Q: What function does the USB master port provide? A: It supports program upload/download from compatible USB flash drives. It cannot act as a network interface or communicate with HMI panels.
Q: Can this controller operate without an energy pack? A: Yes. Control logic runs normally, but volatile data will not be saved to flash during sudden power loss. Add the energy pack if process data retention is required.
Q: Can the RS232 and RS485 serial ports run simultaneously? A: Yes. Each serial channel operates independently and can run separate Modbus RTU or SNP communications at different baud rates.
Q: Is redundancy supported on this controller? A: Hot standby redundancy is not native to this hardware. Select higher-tier processors if fault-tolerant dual-controller operation is required.
