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Real-World Use & Application Scenarios ⚡
The GE IC695ALG626-GB is deployed in demanding industrial automation applications that require a large volume of fast, precise process measurements.3 Unlike universal modules, this module is optimized exclusively for standard industrial current (mA) and voltage (V) signals, maximizing performance for these specific inputs.
Key application scenarios include:
- High-Volume Current Monitoring: In large-scale petrochemical facilities, water distribution networks, or mining operations, it handles hundreds of input points from 4-20 mA transmitters monitoring flow, pressure, and level across a vast plant area. The module’s density allows a single RX3i rack to centralize extensive field data collection.
- Fast Loop Control: It is used in applications like compressor control or boiler feedwater regulation where quick and deterministic measurements are necessary for tight PID loop performance. Its low signal latency is critical for ensuring the control system reacts instantly to process disturbances.
- System Upgrades: It is a go-to choice for engineers upgrading legacy systems (like the Series 90-30) to the high-speed RX3i backplane, as it offers significant channel count and performance improvements over older analog modules.
- Distributed I/O: The module is often placed in remote I/O drops, collecting data close to the field devices and sending the aggregated information back to the central CPU via high-speed Ethernet communications.
The GE IC695ALG626-GB is essential for facilities that need both high channel density and superior measurement resolution without the complexity of universal inputs.
Product Introduction & Positioning
The GE IC695ALG626-GB is a high-density, 16-channel Analog Input (AI) Module dedicated to current and voltage signal acquisition within the GE Fanuc PACSystems RX3i control platform.4 It plugs into the high-speed RX3i Universal Baseplate and functions as the dedicated data collector for common industrial signals.
Positioned as the high-density, fixed-function AI option, the module offers 16 single-ended channels (or typically 8 differential channels, selectable via software) that are individually configurable for multiple current (e.g., 0-20mA, 4-20mA) and voltage (e.g., 0-10V, 5$\pm$10V) ranges.6 This fixed-functionality, in contrast to universal modules, often translates to lower cost per channel and simplified configuration when only standard current and voltage inputs are required. It relies on the RX3i’s robust system features to deliver superior performance, providing the CPU (like the IC695CPE310) with 16-bit resolution data. The module efficiently combines a high volume of inputs with high accuracy, making it a cornerstone for scaling up process monitoring in modern control systems.
- IC695ALG626-GB
- IC695ALG626-GB
Key Technical Features & Functional Benefits
A major functional benefit of the GE IC695ALG626-GB is its high-speed throughput.7 The module is capable of delivering fast scan rates, ensuring minimal delay between the physical process change and the digital data reaching the CPU. This speed is facilitated by the low-latency PCI Express-based RX3i backplane.8 Its high resolution, featuring 16-bit Analog-to-Digital Conversion (ADC), provides excellent measurement fidelity, enabling the controller to discern minute signal variations critical for tight control loop operation.
From a hardware design standpoint, the module offers high channel-to-channel and channel-to-backplane isolation, which is vital for preventing ground loops and minimizing the transmission of electrical noise from one input channel to another. The use of a removable Terminal Board Module (TBM) allows for hot-swap replacement of the GE IC695ALG626-GB without disconnecting field wiring, drastically reducing maintenance time and eliminating the need for a total system shutdown.9 The module also features built-in diagnostics, including open-wire detection in current input modes (4-20mA), which immediately notifies the control system if a sensor cable is disconnected or broken, providing a crucial safety and operational benefit.
Detailed Technical Specifications
| Parameter | Value |
| Model | GE IC695ALG626-GB |
| Brand | GE Fanuc / Emerson |
| Product Type | High-Density Analog Input Module |
| Channels | 16 Single-ended or 8 Differential (Configurable) |
| Input Current Range | 0-20 mA, 4-20 mA (Software Selectable) |
| Input Voltage Range | $\pm$10 V, 0-10 V, $\pm$5 V, 0-5 V (Software Selectable) |
| Resolution | 16 bits (Signed Integer) |
| Isolation | Optical (Channel-to-Bus) |
| Input Scan Time | Configurable (High Speed Available) |
| Power Consumption (5V) | 550 mA from +5 VDC Backplane (Typical) |
| External Supply Voltage | Not Required (Powered by Backplane) |
| Diagnostics | Open Wire Detection (Current Mode), Over/Under Range |
| Absolute Accuracy (Current) | $\pm$0.1% of Full Scale (Typical at 25°C) |
| Field Interface | Removable Terminal Board Module (TBM) |
Related Modules or Compatible Units
IC695ALG600 – The high-density Analog Output module counterpart (e.g., 16 channels) often installed alongside the GE IC695ALG626-GB for a full I/O control suite.
IC695CPE305 – A mid-range PACSystems RX3i CPU module capable of processing the large volume of data generated by the GE IC695ALG626-GB.
IC695TBM002 – A standard Terminal Board Module (TBM) required to facilitate field wiring connection to the dense pin header of the GE IC695ALG626-GB.
IC695ACC302 – An RX3i Universal Baseplate (e.g., 9-slot) which must be used to house and power the high-speed, high-density GE IC695ALG626-GB.
IC695ALG112 – The Universal Analog Input module, which is an alternative choice for applications requiring both current/voltage and RTD/TC inputs in a single module.
IC695PWR001 – A high-capacity power supply module for the RX3i rack, necessary to deliver the substantial 5 VDC current required by the GE IC695ALG626-GB and other advanced modules.
Installation Notes & Maintenance Best Practices
When installing the GE IC695ALG626-GB, adherence to proper wiring methods is crucial due to the module’s high channel count and sensitivity. Always use shielded, twisted-pair wiring for all inputs. The shield must be grounded at the TBM terminal block end only (or sometimes at the sensor, depending on site standards) to avoid creating ground loops, which can destroy the integrity of the 4-20mA signal. Ensure that the module’s power consumption is factored into the total load calculation for the RX3i backplane, as high-density modules draw significant 5 VDC current.
Maintenance activities should include proactive monitoring of the open-wire diagnostic bits via the PLC software. If a fault is detected, the status LED on the GE IC695ALG626-GB will illuminate, guiding technicians to a quick resolution. For differential voltage inputs, confirm that the input wiring minimizes loop area to reduce induced noise. Since the module is hot-swappable via the TBM, replacement or upgrade can be scheduled during production, offering flexibility not possible with traditional fixed-terminal I/O.10
