Genius I/O Blocks Selection Guide
GE Fanuc offers a comprehensive family of intelligent and configurable Genius I/O Input/Output blocks designed to simplify equipment design, enhance system flexibility, and improve production efficiency. These I/O blocks connect field devices to a Genius communications bus and support both discrete and analog inputs/outputs.
Types of Genius I/O Blocks
| Type | Description |
|---|---|
| 115V AC 8 Circuit Grouped I/O | 8 discrete circuits; configurable for input, output, or both at 115V AC. |
| 115V AC/125V DC Isolated I/O | 4 isolated groups, each with 2 circuits; supports 115V AC or 125V DC. |
| 115V AC 16 Circuit Input | 16 resistive input circuits in two groups; for limit switches, pushbuttons, etc. |
| Relay Output Blocks | 16 relay outputs in 4 isolated groups; used for lamps, relays, contactors. |
| 16 Circuit DC I/O | Available in 24V/48V DC source/sink options; configurable circuits. |
| 32 Circuit DC I/O | 12/24V DC source or 5/12/24V DC sink; all 32 circuits configurable. |
| Analog I/O | 115V AC and 24/48V DC options; 4 inputs, 2 outputs with A/D and D/A converters. |
| Current-Source Analog I/O | 4 inputs, 2 outputs; compatible with 4–20 mA devices. |
| Current-Source Analog Output | 6 outputs; 4–20 mA signal compatibility. |
| Current-Source Analog Input | Connects 4–20 mA analog input devices. |
| RTD Input Blocks | Monitors temperature via RTD; 3 isolated groups per block. |
| Thermocouple Input Blocks | Monitors standard thermocouples; 3 isolated input groups. |
Configurable Features
Genius I/O blocks offer advanced configurability such as:
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Circuit-level fault reporting
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Selectable input filtering (10–100 ms)
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Output hold last/default state
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CPU redundancy
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Output pulse testing
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Bus Switching Module control
These features vary by block type and are tailored to enhance control, diagnostics, and response efficiency.
Circuit Protection
These blocks use electronic fusing, allowing:
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Rapid shutdown (as fast as 5 µs)
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Overcurrent protection
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Reset via controller or handheld monitor
| Type | Circuit Protection |
| 115V AC 8 Circuit Grouped I/O | Trips at >30A at start, >20A after 2 cycles |
| 115V AC/125V DC Isolated I/O | Trips at >25A (AC), >15A (DC) within microseconds |
| 16 Circuit DC I/O | Trips at >10A instantly on startup |
| 32 Circuit DC I/O | Trips at >5A within 5 ms |
Diagnostic Features
Genius I/O blocks support granular diagnostics, including:
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Open/short circuit detection
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Overtemperature and overload diagnostics
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Pulse-testing control
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EEPROM failure alerts
Each block includes diagnostics tailored to its function, ensuring fault isolation and proactive maintenance.
Field Wiring Specifications
All Genius I/O blocks use standard screw and clamp terminals. Supported wire sizes range from AWG #22 to AWG #12, depending on block type. Some blocks allow multiple wires per terminal.
Power Requirements
| Type | Power Source |
| Grouped I/O & Input Blocks | Powered via connected device voltage |
| Relay Output Blocks | Requires 115V or 230V AC; 5–250V AC/DC for outputs |
| DC I/O Blocks | 12/24V DC; TTL 5V for sink blocks |
| Analog/Current-Source Blocks | 115V AC/125V DC or 24/48V DC depending on model |
Assembly Design
Each block includes:
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Terminal Assembly: Field wiring
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Electronics Assembly: Active circuits, communication logic
Configuration data is stored in the terminal base, allowing easy electronics swap without reconfiguration.
Environmental Specifications
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Operating Temperature: Up to 60°C
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Vibration: MIL-STD-810C & IEC 68-2-6 compliant
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Noise Immunity: Suitable for industrial environments
Conclusion Genius I/O blocks by GE Fanuc Emerson are designed for performance, flexibility, and system reliability. Their diagnostic capabilities, robust protections, and configurability make them ideal for demanding industrial applications.
Need Genius I/O Blocks?
For pricing, availability, or help choosing the right model, contact:
PLG Automation
Email: sales@plgautomation.com
Phone: 800-906-9271