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Help CenterGE IC800SSI228RD2-CE SSI Signal Input Module
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GE Fanuc IC800SSI228RD2-CE is a dedicated SSI signal input module for the RX3i series PLC, designed specifically for synchronous serial interface (SSI) signal acquisition in industrial field applications. It enables seamless integration with the RX3i series PLC system.Its core function is to receive serial digital signals output by SSI devices such as rotary encoders and displacement sensors. Through its built-in signal conditioning and decoding circuitry, it converts these signals into digital/analog data recognizable by the PLC, achieving accurate acquisition and real-time transmission of parameters such as device position, rotational speed, and displacement.Featuring high anti-interference performance, high resolution, and wide compatibility, it supports configuration of multiple SSI protocols. Built to industrial-grade design standards, it can operate stably for long periods in harsh industrial environments with strong electromagnetic interference and high vibration, such as metallurgy, machinery manufacturing, wind power, and rail transit. It serves as a core input module for the RX3i system to implement high-precision position and speed monitoring.
I. Specifications and Physical Parameters
(I) Electrical and Signal Parameters
Signal Type: Synchronous Serial Interface (SSI) input, supporting single-ended/differential input modes, compatible with most industrial-grade SSI encoders and displacement sensors.
Resolution Support: Up to 25-bit data resolution; data bits and clock frequency can be flexibly configured according to sensor models to suit monitoring scenarios with different accuracy requirements.
Communication Parameters: Configurable clock frequency range of 100kHz–1MHz; supports synchronous/asynchronous data acquisition modes with fast data update cycles to meet real-time monitoring requirements.
Power Supply: The module is powered by the RX3i rack backplane (5VDC) with no need for external power supply, reducing wiring complexity.
Electrical Isolation: 2500VAC electrical isolation between input channels and the backplane, compliant with IEC 61010 industrial safety standards, effectively suppressing common-mode and differential-mode interference to ensure signal acquisition accuracy.
Protection Functions: Built-in overvoltage and overcurrent protection to prevent module damage caused by abnormal sensor signals or wiring errors; equipped with signal loss detection that triggers an alarm in case of abnormality.
Status Indication: Front-panel LED indicators clearly display module operating status, normal signal, signal loss, and fault alarm conditions for quick on-site troubleshooting.
(II) Physical and Installation Parameters
Mounting Position: Compatible with standard GE RX3i series PLC racks; can be installed in any compatible slot without a fixed position, enabling flexible system layout.
Mounting Method: Standard rack slide-in installation with locking latches for easy installation, quick removal and replacement, facilitating system upgrades and maintenance.
Dimensions: Complies with standard RX3i series module dimensions; compact structure with small cabinet footprint, suitable for installation in standard industrial control cabinets.
Net Weight: Approx. 0.3kg; lightweight design reduces rack load and simplifies installation and handling.
Connectors: Industrial-grade anti-vibration locking terminals; signal inputs use screw-crimp terminals for reliable contact, vibration resistance, and anti-loosening performance to meet long-term on-site industrial operation requirements.
Markings: The module surface is clearly printed with the model IC800SSI228RD2-CE, GE Fanuc Logo, and key parameter labels for quick on-site identification, model verification, and operation and maintenance.
(III) Environmental and Protection Parameters
Operating Temperature: -20℃ to +60℃; wide-temperature adaptive design ensures stable operation in extreme high and low temperature industrial environments, suitable for outdoor and high-temperature workshop applications.
Relative Humidity: 5%–95% (non-condensing); excellent moisture resistance enables normal operation in high-humidity environments, suitable for humid industrial scenarios such as chemical processing and water treatment.
Protection Degree: Front panel IP20; must be installed in enclosed industrial control cabinets with basic dustproofing to prevent dust from entering and damaging internal circuitry.
Electromagnetic Immunity: Complies with EN 61000-6-2/6-4 EMC standards; resistant to strong electromagnetic interference from frequency converters, high-power motors, and high-voltage equipment, ensuring stable and distortion-free signal acquisition.
Vibration/Shock Resistance: Meets IEC 60068-2-6 (vibration) and IEC 60068-2-27 (shock) standards; robust structure adapts to high-frequency vibration conditions in mechanical processing and rail transit.
Cooling Method: Fanless passive cooling via natural heat dissipation through the module housing and cabinet air ducts, requiring no additional cooling equipment and lowering maintenance costs.
II. Functions and Features
High-Precision SSI Signal Acquisition: Supports up to 25-bit resolution for accurate capture of position, speed, displacement, and other parameters from encoders and displacement sensors, with minimal acquisition error to meet high-precision monitoring needs.
Flexible Protocol Configuration: Clock frequency, data bits, and acquisition mode can be configured via GE dedicated programming software (e.g., Proficy Machine Edition), ensuring compatibility with SSI sensors of various brands and specifications for strong versatility.
Strong Anti-Interference Capability: Dual electrical isolation between input channels and the backplane, combined with anti-interference circuit design, effectively suppresses strong on-site electromagnetic interference and avoids signal distortion or acquisition interruptions.
Seamless Integration: Plugs directly into RX3i series PLC racks without additional conversion modules; communicates rapidly with the CPU via the backplane bus with low data transmission latency, enabling smooth cooperation with the PLC system.
Comprehensive Fault Diagnosis: Built-in detection for signal loss, overvoltage, overcurrent, and other faults. Fault status is visually indicated by LEDs and can be uploaded to the PLC CPU for centralized system monitoring and troubleshooting.
High Reliability and Durability: Uses industrial-grade high-quality electronic components with stringent environmental testing and quality control. Fanless design delivers a long Mean Time Between Failures (MTBF) and maintenance-free long-term operation in harsh industrial environments.
III. Application Scenarios
Machinery Manufacturing: Position and speed monitoring for machine tools, CNC machines, and robots. SSI encoder signal acquisition enables precise positioning and speed control of machine feed axes and robot joints, improving machining accuracy and production efficiency.
Wind Power: Monitoring of wind turbine nacelle orientation and blade pitch angle. Adapted to high wind, high vibration, and wide-temperature conditions at wind farms, SSI signal acquisition supports accurate attitude adjustment and safe operation of turbines.
Rail Transit: Position and speed monitoring for subways and light rail vehicles. Track encoder signal collection provides accurate position and speed data for train traction and braking systems, ensuring safe train operation.
Metallurgy: Monitoring of roller table speed and workpiece displacement in rolling mills and continuous casters. Adapted to strong electromagnetic and high-temperature environments in metallurgical sites, it enables precise production process control and improved product quality.
General Industry: Material positioning on automated production lines, speed monitoring of conveying equipment, and various scenarios requiring high-precision position/speed acquisition. As a dedicated SSI input module for the RX3i system, it provides a stable and accurate signal acquisition solution.
RX3i System Upgrade/Expansion: Used as a GE original standard spare part for retrofitting or expanding RX3i series PLC systems, replacing outdated signal input modules to enhance signal acquisition accuracy and system reliability.
IV. Operating Notes
Pre-Installation Preparation: Verify the module model IC800SSI228RD2-CE and confirm compatibility with the RX3i series PLC rack version. Completely disconnect power and wait for system capacitors to fully discharge for ≥5 minutes. Wear insulated gloves; hot-plugging of modules or wiring is strictly prohibited to prevent electric shock or module damage.
Installation and Wiring Specifications: Ensure the module is fully inserted into the rack slot and locked during installation to prevent loosening from vibration. Strictly distinguish signal input terminals and grounding terminals; incorrect or reverse connection is forbidden. Use twisted-pair shielded cables for SSI signals with single-ended grounding, and minimize cable length to reduce interference. Avoid routing signal cables with high-voltage cables in the same trunking to prevent electromagnetic interference-induced signal distortion.
Parameter Configuration: Configure module parameters using Proficy Machine Edition software, setting clock frequency, data bits, acquisition mode, and other parameters according to the sensor model. Back up system programs before configuration, perform offline debugging first, and connect sensors and the PLC system only after confirming correct parameter settings. Random modification of core acquisition parameters during system operation is strictly prohibited.
Environmental Control: Install in enclosed, dry, and ventilated industrial control cabinets; avoid direct sunlight, dust accumulation, and exposure to corrosive or flammable gases. Keep away from strong electromagnetic interference sources such as frequency converters and high-voltage busbars to prevent signal acquisition distortion. Maintain an operating temperature of -20℃ to +60℃ and humidity of 5%–95% (non-condensing). Reserve sufficient heat dissipation space inside the cabinet and do not block the module’s heat dissipation surface.
Routine Maintenance and Safe Operation: Regularly clean dust from the module surface and terminals using dry compressed air or a soft brush to keep the module clean. Inspect module mounting and terminal connections monthly to ensure no looseness or oxidation, addressing oxidation promptly if found. Monitor module operating status and fault records daily through the PLC system for timely anomaly detection and resolution. Disconnect main power before maintenance and wait for internal capacitors to fully discharge. Unauthorized circuit modification or use of non-original components is strictly prohibited, as this will void the warranty and create safety hazards. Store spare modules in a dry, ventilated environment and perform power-on testing every 6 months to ensure proper functionality.
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