IC660EPM100J | GE Electric triple-redundant CPU module
Product Function
The IC660EPM100J is a triple-redundant CPU module for GE’s 90-30 Series Programmable Logic Controllers (PLCs). It executes control logic, processes I/O data, and manages communications via triple modular redundancy (TMR), providing fault-tolerant operation for critical industrial processes. Supports hot-swap replacement and automatic diagnostics.
Product Specifications & Parameters
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Category
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Specification
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Manufacturer
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GE Industrial Solutions (Emerson)
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Series
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Series 90-30 PLC (VersaMax Platform)
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Type
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Redundant CPU Processor
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Form Factor
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Double-width module (2-slot)
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Processor
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32-bit RISC (Triple Modular Redundancy)
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Memory
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16K words user logic; 32K words with expansion
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Scan Time
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0.2 ms/K logic instructions
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I/O Capacity
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Up to 512 discrete / 128 analog points
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Communications
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RS-232/485 serial; Genius Bus (for I/O expansion)
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Redundancy
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TMR architecture w/ automatic synchronization
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Hot-Swap
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Supported (live module replacement)
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Power Consumption
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850 mA @ 5V DC
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Operating Temp.
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0°C to +60°C (standard); -40°C to +70°C (extended range)
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Certifications
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UL 508, CE, cULus, RoHS, IEC 61131-2, SIL 2 (IEC 61508)
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Backup
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Battery-backed RAM (IC660BAT101)
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Series Information
Part of GE’s Series 90-30 PLC Family – key compatible components:
- Racks: IC660CHSxxx (5/10/16-slot VersaMax racks)
- Power Supplies: IC660PSAxxx (24V/120V/240V DC/AC)
- I/O Modules:
- IC660ELB912 (Discrete Input)
- IC660EBD020 (Analog Output)
- IC660ERD040 (Relay Output)
- Software: VersaPro™, Proficy™ Machine Edition
Key Features
- Triple Redundancy (TMR): Three parallel CPUs with voting logic for fault tolerance.
- Hot-Swap Operation: Replace modules without system shutdown.
- Diagnostic LEDs: Per-channel status (RUN, OK, FAULT, COMMs).
- Robust Communications: Dual Genius Bus ports for I/O expansion.
- SIL 2 Compliance: Functional safety for process industries.
- Real-Time Clock: Battery-backed time-stamping for events.
Role & Purpose
- Fault-Tolerant Control: Ensures continuous operation despite hardware failures.
- Data Integrity: Cross-channel validation of I/O and logic.
- Seamless Failover: Automatic switch to healthy CPU (<50ms).
- System Diagnostics: Reports faults via software or HMI.
Applications & Use Cases
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Industry
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Application
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Oil & Gas
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Offshore platform safety shutdown systems
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Chemical Processing
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Batch reactor control & emergency interlocks
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Power Distribution
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Substation automation & grid protection
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Water Treatment
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Pump station control with flood prevention logic
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Manufacturing
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High-speed assembly line fault-tolerant controls
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Transportation
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Tunnel ventilation safety systems
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Technical Notes
- Redundancy Architecture:
Three CPUs execute identical logic; output voted by 2-out-of-3 system. - Wiring:
- Genius Bus: Terminate via IC660TBXxxx termination blocks.
- Serial Port: RS-232/485 configurable for HMI/SCADA.
- Diagnostic Indicators:
LEDColorStatusRUNGreenNormal executionOKGreenCPU synchronizedFAULTRedHardware errorCOMM A/BYellowGenius Bus activity
- Configuration Rules:
- Max. 2 redundant pairs per Genius Bus segment.
- I/O modules must be within 100m distance.
- Battery life: 5 years (typical).
Critical Installation Guidelines:
- Redundant modules must be adjacent slots (e.g., Slot 1–2).
- Airflow: Minimum 200 LFM (linear feet/minute) for cooling.
- Derating: Reduce I/O capacity by 25% above 55°C ambient.
Typical Redundant Configuration
VersaMax Rack Setup:
Slot 1 : IC660EPM100J (Primary CPU)
Slot 2 : IC660EPM100J (Secondary CPU)
Slot 3 : IC660PSA050 (24V DC Power Supply)
Slots 4-10: I/O Modules (e.g., IC660ELB912, IC660EBD020) 
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