Description
IC693ALG391 GE Fanuc Series 90-30 Analog Current Output Module
Product Dimensions：
Product Description (Detailed Explanation)
The IC693ALG391 provides two independent output channels capable of converting digital data from the PLC CPU into a proportional analog current signal. This module specifically supports the standard 4 to 20 mA range, which is the most common signaling format in process industries due to its inherent noise immunity and “live zero” fault detection capabilities.
Each channel is isolated from the PLC backplane, ensuring that electrical disturbances in the field do not damage the sensitive CPU components. The module features an internal digital-to-analog converter (DAC) that ensures high linearity across the entire output range.
Product Parameters (Technical Specifications)
| Parameter Category | Specification |
| Number of Channels | 2 (Single-ended) |
| Output Current Range | 4 to 20 mA |
| Resolution | 12-bit (1 part in 4096) |
| Load Impedance | 0 to 850 Ohms (at 24V DC loop power) |
| Calibration | Factory calibrated (No user adjustments needed) |
| Accuracy | +/- 0.1% of full scale at 25°C |
| Update Rate | 5 ms (for both channels) |
| External Power Supply | 24V DC (+20%, -15%) |
| Internal Power Consumption | 110 mA from +5V backplane bus |
Product Advantages (Key Benefits)
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High Accuracy: With a 12-bit resolution and low drift, it provides precise control for critical actuators like proportional valves.
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Galvanic Isolation: High-level isolation between the field side and the logic side prevents ground loops and protects the PLC system from surges.
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No User Calibration: The module is factory-calibrated for life, reducing commissioning time and eliminating the need for periodic potentiometer adjustments.
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Robust Diagnostic LEDs: A single “Module OK” LED provides a quick visual reference for the health of the hardware and the presence of backplane power.
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Low Power Requirement: Designed to be highly efficient, minimizing the heat load inside the PLC rack.
Precautions (Important Notes)
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External 24V DC Power: This module requires an external 24V DC power supply to drive the 4-20mA current loops. It will not output a signal using only the PLC backplane power.
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Open Loop Detection: If the field wiring is broken or the load impedance is too high, the module will continue to try and drive the current, but no hardware alarm is triggered on the front panel. It is best to monitor the loop status via the application software.
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Shielding: Always use shielded, twisted-pair cables for analog signals. Connect the shield to the “GND” terminal on the module or the frame ground to prevent EMI interference.
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Load Limits: Ensure the total resistance of the field device and wiring does not exceed 850 Ohms, otherwise, the module may be unable to reach the full 20mA output.
Product Applications (Typical Use Cases)
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Proportional Valve Control: Precise positioning of air or fluid valves in chemical and water treatment plants.
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VFD Speed Control: Providing a remote speed reference (setpoint) to Variable Frequency Drives for motor speed regulation.
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Chart Recorders: Sending process data to analog paper recorders or remote display panels for operator monitoring.
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Power Leveling: Controlling the power output of heaters or SCR-based power controllers in industrial furnaces.
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Actuator Signaling: Interfacing with pneumatic or hydraulic actuators that accept a standard current input.
Shipping Port: Xiamen, China
Payment: Bank of Chicago, Bank of Singapore
Express cooperation: fedex, DHL, UPS and your express account
Service: Professional Sales provides 24 hours /7 days online service
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