Description
IC660HHM501 Genius I/O Hand-Held Monitor
The IC660HHM501 is a rugged, portable operator interface device developed by GE Fanuc (now Emerson Automation) for configuring, monitoring, and troubleshooting Genius I/O industrial control systems. Designed for harsh industrial environments, it serves as a critical tool for technicians to diagnose network issues, force I/O states, and manage parameters without relying on a PLC or PC. Despite being discontinued by the manufacturer, it remains a cornerstone in legacy GE systems due to its reliability and compatibility .
Key Features and Functionality
User Interface and Controls
4-line × 16-character LCD Display: Shows real-time I/O data, diagnostics, and bus status in English, Spanish, French, or Italian .
20-key Sealed Membrane Keypad: Includes function keys for quick access to configuration menus, data monitoring, and system diagnostics. A security key switch restricts access to sensitive operations (e.g., parameter editing) .
Compact Design: Weighs 1.6 lbs (0.73 kg) without the case and measures 8.00 × 3.75 × 1.25 inches, ensuring portability in tight spaces .
Power and Battery Requirements
Dual Power Source: Operates on 115/230V AC (via an external charger) or the IC660BPM500 rechargeable battery pack (required even when AC power is connected). The battery provides up to 6 hours of continuous runtime and requires 6–24 hours for a full charge .
Automatic Power Management: Shuts off after 10 minutes of inactivity to conserve energy (disabled via settings for continuous use) .
Communication and Compatibility
Genius Bus Protocol: Directly interfaces with Genius I/O modules (e.g., IC660BBD101 discrete I/O, IC660BCM501 bus controller) for real-time data exchange .
RS-232 Interface: Supports remote diagnostics and programming when connected to a PC via a serial cable (e.g., IC660HHC005 coiled cable) .
Multi-Vendor Integration: Works with third-party devices like Horner Automation’s HE670RLY168 relay modules when configured via the HHM .
Industrial-Grade Durability
Temperature Range: Operates at 0–60°C (32–140°F) and withstands storage at -40–70°C (-40–158°F), making it suitable for extreme environments .
EMC Compliance: Resists electromagnetic interference from factory machinery, ensuring stable performance in noisy industrial settings .
Technical Specifications
| Parameter | Value/Description |
| Product Model | IC660HHM501 |
| Manufacturer | GE Fanuc (Emerson Automation) |
| Core Function | On-site configuration, monitoring, and troubleshooting of Genius I/O systems. |
| Power Input | 115/230V AC (47–63 Hz) or IC660BPM500 battery pack. |
| Communication Protocols | Genius Bus, RS-232. |
| Weight/Dimensions | 1.6 lbs (0.73 kg); 8.00 × 3.75 × 1.25 inches (excluding case) . |
| Operating Temperature | 0–60°C (32–140°F); Storage: -40–70°C (-40–158°F) . |
| Compatibility | GE Genius I/O modules, IC660BPM500 battery, IC660HHC005 communication cable. |

IC660HHM501
Applications and Industry Impact
Automotive Manufacturing
A Southeast Asian automotive plant used the IC660HHM501 to diagnose welding line faults on IC660BBD101 discrete I/O modules. The monitor’s real-time data display and forced I/O functionality reduced troubleshooting time by 30%, minimizing downtime .
Petrochemical Refineries
In hazardous areas, technicians used the HHM to configure IC660BCM501 bus controllers without relying on PCs, ensuring compliance with explosion-proof protocols. The IC660BPM500 battery allowed 6 hours of continuous operation in remote locations .
Power Generation
A U.S. power plant deployed the IC660HHM501 to monitor steam turbine sensors connected to Genius I/O racks. Its ability to display bus scan times and diagnostics helped identify communication bottlenecks before they caused outages .
Installation and Maintenance
Setup Steps
Battery Installation: Insert the IC660BPM500 battery pack (mandatory even with AC power) and secure it per the user manual.
Communication Connection: Connect to the Genius bus via a coiled cable (IC660HHC005) or RS-232 to a PC for advanced programming .
Initial Charge: Charge the battery for 24 hours before first use to maximize capacity .
Routine Maintenance
Battery Care: Perform a full discharge-recharge cycle monthly to prevent capacity degradation. Replace the battery if runtime drops below 4 hours .
Physical Inspection: Check for loose connections, cracks in the housing, or damage to the keypad membrane. Clean the screen with a dry cloth .
Firmware Updates: Use the HHM’s built-in interface or a PC to update firmware (if supported by Emerson) .
Troubleshooting Tips
No Power: Verify the battery is properly seated and charged. If using AC power, check the charger connection.
Communication Failure: Reseat the bus cable and ensure the HHM’s address matches the Genius network configuration .
Related Products and Ecosystem
IC660BPM500 Battery Pack: Exclusive power source for the HHM, providing 6 hours of runtime .
IC660HHC005 Coiled Cable: Connects the HHM to Genius I/O modules for data transmission .
IC660BBD101 Discrete I/O Module: Monitored and configured via the HHM, with forced I/O capabilities .
IC660BCM501 Bus Controller: Manages Genius bus communication, paired with the HHM for setup .

IC660HHM501
Availability and Support
Status: Discontinued by GE Fanuc but available through authorized resellers and surplus suppliers. Refurbished units may offer shorter warranties (typically 6–12 months) .
Technical Support: Emerson provides documentation and limited troubleshooting assistance via its industrial support portal. For critical systems, consider consulting a certified GE automation partner.
Alternatives: While no direct replacement exists, modern GE PACSystems RX3i/RX7i PLCs offer built-in web-based interfaces for remote monitoring, reducing reliance on legacy HHMs .
Conclusion
The IC660HHM501 remains an indispensable tool for maintaining legacy GE Genius I/O systems, offering unmatched portability and real-time diagnostics in harsh environments. Its mandatory battery design ensures uninterrupted operation during power outages, while its rugged construction withstands extreme conditions. Although discontinued, its compatibility and reliability make it a cost-effective solution for industries where downtime is not an option.
Full 12-month warranty on all components
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Full 12-month warranty
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Full 12-month warranty on all components