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Product Model: IC694ALG391
Product Brand: GE Fanuc (Emerson Automation)
Product Series: PACSystems RX3i / Series 90-30 I/O
Product Features:
• Dual analog output channels supporting current and voltage ranges (0–20 mA, 4–20 mA, 1–5 V, 0–5 V) for versatile field device control
• High-resolution 12-bit D/A conversion with fast 5 ms update rate for smooth process control
• Easy rack-mount installation compatible with Series 90-30 and RX3i backplanes
• Precision outputs suitable for modulating valves, VFDs, panel meters, and loop-controlled actuators
Technical Specifications
| Specification | Details |
|---|---|
| Model Number | IC694ALG391 |
| Manufacturer | GE Fanuc / Emerson Automation |
| Product Type | Analog Output Module |
| Series | PACSystems RX3i / Series 90-30 Supported |
| Number of Channels | 2 Analog Outputs |
| Output Ranges | 0–20 mA / 4–20 mA (current); 1–5 VDC / 0–5 VDC (with resistor) |
| Resolution | 12 bits (4 µA / 5 µA step for current) |
| Update Rate | 5 ms per channel |
| LED Indicators | “Module OK” status LED |
| Power Consumption | 30 mA @ +5 VDC; 215 mA @ +24 VDC |
| Mounting Type | Rack I/O slot |
| Operating Temp | 0°C to 60°C (32°F to 140°F) |
| Storage Temp | –40°C to 85°C |
| Isolation | Optical isolation between backplane and outputs |
- IC694ALG391
Product Role & System Fit
In industrial automation, many processes require not just digital ON/OFF signals but continuous analog control. The IC694ALG391 is a specialized analog output module designed for use in GE Fanuc PACSystems RX3i PLC platforms — with support for Series 90-30 expansion backplanes as well. It acts as a bridge between the digital domain of a PLC CPU and real-world analog devices such as actuating valves, variable frequency drives (VFDs), and process instrumentation.
Unlike discrete output modules that simply switch a signal on or off, the IC694ALG391 generates smooth current and voltage output signals based on digital values received from the controller. Its primary function is to convert binary data into precise analog signals, enabling proportional control in applications where fine stimulus rather than binary commands are required.
This module fits in any standard I/O slot in PX baseplates — whether a 5-slot or 10-slot configuration — allowing integration alongside CPUs, discrete I/O modules, communication peripherals, and other specialized cards. By maintaining compatibility with both PACSystems RX3i and legacy Series 90-30 expansions, the IC694ALG391 supports both new installations and brownfield upgrades with minimal disruption to existing infrastructure.
For automation engineers, this means retaining architectural flexibility; the same controller and baseplate can orchestrate logic decisions, discrete safety actions, and analog loop outputs without the need for external signal converters or separate D/A systems. It’s a compact solution that expands the functional capability of PLC systems used in process industries, packaging, utilities, and complex machine control.
