Description
Product Overview
GE IC695CHS016-CA is a universal chassis/backplane assembly used as the central hardware mounting platform for PACSystems RX3i programmable automation controllers. It does not execute control logic itself; instead, it provides the physical slots, internal communication pathways, grounding structure, and power distribution required for CPU, power supply, communication, and I/O modules installed in the RX3i system.
The IC695CHS016-CA provides sixteen universal slots, allowing engineers to build larger RX3i control systems where multiple I/O, communication, and specialty modules must be installed in a single rack. The backplane supports RX3i PCI-based modules as well as compatible serial modules from the Series 90-30 family, helping plants maintain existing architectures while expanding or upgrading control platforms.
The GE IC695CHS016-CA revision is important in modern RX3i installations because later CPU and communication modules require specific backplane hardware revisions for compatibility. Emerson compatibility documentation lists IC695CHS016-CA or later among supported RX3i backplane revisions for newer controller configurations.
From a maintenance perspective, the chassis is a critical infrastructure component. A backplane fault can appear as random module communication failures, missing I/O modules, controller startup problems, or intermittent diagnostics. Before replacing the chassis, technicians should confirm that the problem is not caused by module seating, power supply issues, grounding problems, or configuration errors.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | GE Intelligent Platforms / Emerson Automation Solutions |
| Model | IC695CHS016-CA |
| Product Type | RX3i Universal Backplane |
| System Platform | PACSystems RX3i |
| Number of Slots | 16 |
| Backplane Type | Universal PCI + Serial Bus |
| Supported Modules | IC695 RX3i modules, selected IC693/IC694 Series 90-30 modules |
| CPU Support | RX3i CPU and PACSystems controller modules |
| Communication Bus | High-speed PCI-based bus + serial expansion bus |
| Power Connection | Isolated +24 VDC terminal input |
| Expansion Support | Serial expansion and remote backplane connection |
| Mounting Method | Panel/rack mounting |
| Grounding | Integrated grounding bar and shield grounding points |
| Revision | CA |
| Application | PLC control cabinets, process automation, machine control |
The IC695CHS016 family includes a 16-slot universal backplane design with module slot references, grounding provisions, isolated +24 VDC input, and expansion connection capability.
Main Features and Advantages
IC695CHS016-CA
16-Slot High-Density System Platform
The primary advantage of the IC695CHS016-CA is its capacity. Sixteen module positions allow engineers to combine:
- CPU modules
- Power supply modules
- Digital I/O
- Analog I/O
- Motion modules
- Communication interfaces
- Specialty control modules
This makes it suitable for larger RX3i control systems requiring significant I/O capacity.
Universal Module Compatibility
The RX3i universal backplane design allows both newer IC695 modules and selected legacy Series 90-30 modules to operate within the same hardware platform. This provides flexibility during system expansion or migration projects.
Dual-Bus Architecture
The backplane integrates:
- High-speed PCI-based communication for RX3i modules
- Serial bus support for compatible legacy modules
This architecture allows mixed module configurations where required by the application.
Integrated Grounding and Shield Management
The chassis includes grounding features intended for industrial control cabinet installation, including grounding points and provisions for connecting module and cable shields.
Proper grounding is especially important in systems containing:
- Analog measurement modules
- High-speed communication modules
- Motion control hardware
- Industrial networks
Long-Term RX3i System Support
Many industrial plants continue operating GE RX3i systems for production equipment, utilities, and process applications. Maintaining a tested spare can reduce downtime caused by chassis damage or connector failures.
Application Scenarios
Process Automation Systems
Typical applications include:
- Chemical processing
- Water treatment
- Energy systems
- Manufacturing utilities
Machine Control
The 16-slot chassis supports larger machine automation platforms requiring multiple I/O and communication modules.
Legacy System Expansion
The universal architecture allows existing Series 90-30 module investments to be integrated into RX3i-based systems where compatibility is supported.
Remote and Distributed Control
Through expansion backplanes and communication modules, RX3i systems can support distributed I/O architectures.
Related Components
- IC695CPE305 / IC695CPE310 — RX3i CPU modules used with IC695CHS016 chassis.
- IC695PSA040 — RX3i power supply module.
- IC695ETM001 — Ethernet communication module.
- IC695PNC001 — PROFINET controller interface.
- IC695CHS012-CA — 12-slot RX3i universal backplane alternative.
- IC695CHS007 — 7-slot RX3i chassis option.
Engineer’s Guide: Field Pitfalls
⚠️ Do Not Confuse the Backplane With a CPU Module
The does not contain:
- CPU logic
- Application memory
- Ethernet communication functions
- I/O processing
It is the physical system rack.
⚠️ Verify Hardware Revision Compatibility
The suffix matters:
- IC695CHS016
- IC695CHS016-BA
- IC695CHS016-BAMP
- Later revisions
Newer RX3i controllers may require CA or later hardware revisions.
⚠️ Check Slot Configuration Before Replacement
Record:
- CPU position
- Power supply location
- I/O module order
- Communication modules
- Expansion cables
A replacement chassis may require restoring the exact module arrangement.
⚠️ Inspect Connectors Carefully
Common backplane-related problems include:
- Bent module connectors
- Poor module seating
- Oxidized contacts
- Mechanical damage
- Vibration-related connector issues
⚠️ Verify Power Distribution
Before replacing the chassis, check:
- +24 VDC feed
- Power supply health
- Grounding connection
- Shield termination
- Cabinet wiring
A power distribution problem can appear as a backplane communication failure.
Frequently Asked Questions
GE ?
It is a 16-slot universal backplane chassis for the PACSystems RX3i PLC platform.
Is a PLC CPU?
No. It is a chassis/backplane component.
How many modules can it hold?
It provides 16 universal module slots.
es support Series 90-30 modules?
Yes, selected IC693/IC694 serial modules are supported through the RX3i universal backplane architecture.
What is the differencend ?
The suffix indicates hardware revision. The CA revision includes hardware changes and is required for compatibility with certain newer RX3i controller configurations.
What should be requested when purchasing a replacement?
For a used or refurbished , request:
- Front and rear chassis photographs
- Exact part number verification
- Hardware revision confirmation
- Connector inspection
- Slot continuity check
- Grounding terminal inspection
- Expansion connector test
- Compatibility confirmation with installed CPU
- Functional rack test
- Test report
Recommended procurement description:
GE / Emerson PA3i , 16-Slot Universal Backplane Chassis, PCI + Serial Bus Architecture, for RX3i CPU and I/O Modules — verify hardware revision compatibility before replacement.
