Product Core Brief
- Model:
- Brand: GE Fanuc / GE
- Series: Series 90-30 PLC
- Core Function: Executes user control logic, manages local and remote I/O racks, and handles plant network communications via dual integrated Ethernet ports.
- Product Type: High-Performance CPU Processor Module
- Key Specs: 133MHz 586 processor | 240KB configurable user memory | Dual 10/100 Ethernet with internal switch Note: OEM discontinued legacy hardware; factory new stock extremely limited, surplus and refurbished units widely traded. The -GU suffix denotes specific factory hardware revision. Hot swapping is not supported on Series 90-30 backplanes.
Key Technical Specifications
- Processor: 133 MHz embedded 586 with hardware floating-point math
- User Memory: 240 KB configurable flash/RAM memory
- Boolean Scan Speed: 0.15 ms per 1K boolean contact logic
- Onboard Interfaces: Dual auto-sensing 10/100BASE-TX RJ45 Ethernet with built-in switch
- Supported Protocols: SRTP, Ethernet Global Data (EGD)
- Serial Access: RS-485 SNP/SNPX via compatible rack power supply terminal
- Maximum System Capacity: 8 total racks (1 main rack + up to 7 expansion/remote racks)
- I/O Limit: 2048 combined discrete I/O points; up to 1024 analog words
- Backplane Power Draw: 7.4 W @ 5 VDC
- Operating Temperature: 0°C to 60°C horizontal cabinet mounting
- Storage Temperature: -40°C to 85°C
- Form Factor: Single-width Series 90-30 rack slot
- Compatible Programming Software: Proficy Machine Edition, VersaPro
- Agency Certifications: UL508, C-UL Class I Div 2, CE
Product Introduction
This unit is the top-tier processor for Series 90-30 control systems. The dual Ethernet ports with integrated switch simplify network daisy-chaining without external network hardware for HMIs and peer PLC communications.
All program logic, register data and network configuration reside in onboard flash memory. It supports floating-point calculations and periodic interrupt subroutines, suited for complex batch and continuous process control retrofit applications.
QA & Testing SOP (Transparency Building)
- Incoming Inspection: Verify part marking and -GU revision suffix. Inspect backplane edge pins for bending or corrosion; examine housing and port connectors for physical damage.
- Live Testing: Mount into validated Series 90-30 rack, apply nominal rack power. Load representative user program, establish Ethernet communications, and run continuous 24-hour logic cycle testing.
- Electrical Testing: Use Fluke 115 to monitor backplane 5VDC rail stability. Insulation resistance testing must exceed 10MΩ between circuit traces and chassis protective ground.
- Firmware/Config Backup: Record installed CPU firmware version. Capture photos of Ethernet MAC label and front panel switch settings before erasing existing configuration.
- Final QC & Packaging: Place unit inside anti-static shielding. Attach dated QC test tag confirming program execution and Ethernet connectivity validation prior to shipment.
Installation Pitfalls & Guide (Engineer to Engineer)
❗ No Hot Swap Support: Series 90-30 backplanes lack hot-swap bus logic. Live removal crashes all rack I/O and risks permanent backplane trace damage. Full rack power shutdown mandatory. ❗ Revision Suffix Matching: The -GU hardware revision carries specific component screening. Direct substitution with non-matched suffix variants may require firmware adjustment and post-replacement validation. ❗ Built-In Switch Misunderstanding: The two Ethernet ports share a single IP address. They cannot operate as independent isolated network interfaces. ❗ Firmware Mismatch Risk: Older programming software builds cannot connect to newer CPU firmware. Confirm software compatibility before attempting program uploads. ❗ ESD Dangers: Un-grounded handling can damage Ethernet transceivers and memory circuits. Static faults often appear as intermittent network dropouts after commissioning. ❗ Power Budget Oversight: This module draws 7.4W. Recalculate total rack power consumption to avoid overloading the Series 90-30 power supply.
Replacement Guide:
- Pre-install: Activate lockout-tagout on rack power; back up the complete user program and hardware configuration. Photograph all Ethernet wiring.
- Removal: Unplug Ethernet cables, unlatch module and slide straight out without twisting backplane connectors.
- Install: Seat new unit fully into designated CPU slot, lock latches, reconnect Ethernet cabling.
- Power-on Test: Restore rack power, monitor CPU status LEDs, download saved program, assign matching IP address and verify I/O and network communications.
FAQ (Frequently Asked Questions)
Q: Does this module support hot swapping? A: No. Series 90-30 architecture does not implement hot-swap functionality. Complete rack power shutdown is required before removing or installing the unit.
Q: What is the differencend ? A: The base catalog number defines core functionality. The -GU suffix identifies a specific PCB hardware revision. Mechanically interchangeable, but always perform full communication and logic testing after cross-revision replacement.
Q: Can the dual Ethernet ports be assigned separate IP addresses? A: No. The internal switch links both ports under one single IP address. Use external managed switches if network segregation is required.
Q: Does this CPU support redundancy? A: Native hot-standby redundancy is not built into this hardware. Redundant control layouts require separate racks and additional synchronization hardware.
Q: Can this CPU be installed inside PACSystem RX3i racks? A: No. Form factor, backplane signaling and protocol are exclusive to Series 90-30 chassis. It cannot operate within RX3i systems.
Q: What happens if power is lost during a firmware upgrade? A: The CPU can become unbootable. Maintain stable rack power and retain a spare processor before initiating any firmware flash operation.
Q: Will saved program files load directly onto a replacement unit? A: Program logic imports without modification. Network IP settings and fault history do not transfer automatically; reconfigure Ethernet parameters and execute a full I/O validation after replacement.
