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In power plants and material handling facilities where central controllers must coordinate remote I/O racks over long distances without compromising scan times, the GE IC670GB1002H serves as the Genius Bus Interface Unit for PACSystems RX7i and RX3i platforms. It is widely used in industrial automation for distributed setups like conveyor transfer towers, water pumping stations, and boiler feed systems, linking up to 32 remote drops carrying discrete alarms, analog process values, and drive commands via a single twisted-pair backbone. Engineers choose the GE IC670GB1002H in control systems demanding high-availability I/O exchange, such as those monitoring turbine vibrations or tank farm levels, where selectable termination resistors ensure signal integrity across 1200-meter trunks amid EMI from nearby motors or arc flash.
This interface unit commonly appears in utility substations aggregating breaker trips and CT/VT signals from outlying panels, or in mining crushers syncing jaw position feedbacks with safety gates. In oil refineries, it is applicable in control systems daisy-chaining distillation tower overrides and pump seal pressures, with baud rates tuned to cable lengths for glitch-free cyclic polls. OEMs building modular skids favor the GE IC670GB1002H for its plug-in rack fit, supporting redundant CPUs that failover seamlessly if a primary link faults, preserving production flow in safety-instrumented loops. Across heavy process and discrete manufacturing, it cuts field wiring by 70% compared to hard runs while piping diagnostics back to central HMIs for at-a-glance health checks.
Product Introduction & Positioning
The GE IC670GB1002H is a Genius Bus Interface Unit designed for GE’s PACSystems RX7i and RX3i modular PLCs, enabling remote I/O racks to communicate as intelligent drops on GE’s proprietary Genius network. It installs in the leftmost slot of a VersaMax or RX3i carrier base, scanning up to five I/O modules locally while exchanging 128 input/128 output bytes per bus scan with host controllers over dual daisy-chain ports. External 115 VAC/125 VDC power feeds the field side, with selectable termination (75/100/120/150 ohms) matching network spans up to 1900m at 153.6 kbaud.
In a plant-wide architecture, the GE IC670GB1002H offloads the main CPU by buffering local data and handling bus arbitration, supporting up to 64 drops total for scalable distribution from single-skid controls to campus-wide loops. It integrates with Proficy Machine Edition for drop mapping and diagnostics, fitting simplex or redundant setups without protocol gateways. The handheld programmer port allows on-site tweaks, making it ideal for field commissioning.
Integrators position the GE IC670GB1002H as a robust bridge for hybrid PAC/VersaMax systems, where its surge-protected design and LED status suite minimize unplanned stops in EMI-heavy zones like steel mills or wastewater lifts.
Key Technical Features & Functional Benefits
The GE IC670GB1002H supports Genius baud rates from 38.4 to 153.6 kbaud, polling 126 connections with explicit messaging for configuration or diagnostics, ensuring real-time I/O despite 32-drop saturation. Redundant bus paths auto-switch on cable faults, while 6.5 VDC hold-up (10 ms) bridges power glitches without data loss—critical for conveyor merges or valve matrices.
From a build standpoint, the GE IC670GB1002H endures 0-60°C operation with 15A surge tolerance and optical isolation, mounting on DIN carriers with pluggable terminals for vibration-proof links. Power draw peaks at 48 VA full-load, with front LEDs signaling bus active, faults, and power OK for instant verification. A 9-pin D-sub handheld port enables live debugging without laptops.
Native to RX7i/RX3i CPUs, the GE IC670GB1002H maps %I/%Q/%R transparently, supporting proxy I/O for non-Genius devices. Fault buffering and parity checks feed PLC logic for auto-alerts, boosting mean-time-between-failures in unmanned drops.
Over service life, the GE IC670GB1002H achieves 300k+ hour MTBF via coated boards, thriving in 95% humidity cabinets with simple firmware flashes keeping pace with protocol evolutions.
- IC670GB1002H
Detailed Technical Specifications
| Parameter | Value |
|---|---|
| Model | IC670GB1002H |
| Brand | GE PACSystems / VersaMax |
| Product Type | Genius Bus Interface Unit |
| Network Protocol | GE Genius serial bus |
| Baud Rates | 38.4, 76.8, 153.6 kbaud |
| Max Drops Supported | 32 (64 total network) |
| I/O per Scan | 128 bytes input/output |
| Power Supply | 115 VAC (90-135V) / 125 VDC (105-150V) |
| Power Consumption | 48 VA max AC; 24 W max DC |
| Surge Current | 15-50 A peak, 3 ms duration |
| Hold-Up Time | 10 ms at 6.5 VDC, 1.4 A |
| Operating Temperature | 0 to 60 °C |
| Storage Temperature | -40 to 85 °C |
| Relative Humidity | 5% to 95%, non-condensing |
| Termination Resistance | 75, 100, 120, 150 ohms selectable |
| Interfaces | Dual bus ports, 9-pin handheld monitor |
| Status Indicators | LEDs: power, bus active, fault |
| Mounting | VersaMax/RX3i carrier base (DIN rail) |
Related Modules or Compatible Units
IC670CHS100 – VersaMax carrier base hosting the IC670GB1002H with room for five I/O modules.
IC670ALG310 – Analog input module racked behind the IC670GB1002H for remote process signals.
IC670MDL64x – Discrete I/O cards commonly scanned via the IC670GB1002H in field drops.
IC695CPU315 – RX3i CPU that configures and polls the IC670GB1002H over Genius.
IC670GBI102 – Enhanced variant for higher redundancy alongside the IC670GB1002H.
Installation Notes & Maintenance Best Practices
Before powering the GE IC670GB1002H, match baud/termination DIP switches network-wide and route shielded twisted-pair through dedicated trays, grounding shields single-end at racks to block EMI. Install in carrier slot zero, torque terminals to spec, and verify continuity before applying 115 VAC—watch for steady PWR LED and flashing bus activity on first poll. Maintain 50 mm airflow clearance in enclosures.
Monthly LED sweeps catch bus-off flashes; quarterly, connect handheld programmers to dump counters for parity spikes signaling cable wear. Reseat terminals yearly in humid areas, and log drop utilization during expansions to avoid saturation. Firmware updates require CPU halt but restore in under 10 minutes.
