Product Overview

The GE Fanuc IC670ALG330 is an 8-point analog current-source output module from the Field Control series. This module operates with a Bus Interface Unit (BIU) in a Field I/O control system. Engineers use the IC670ALG330 to send analog control signals to valves, actuators, and VFDs. Its eight single-ended output channels provide 0-20 mA current signals for precise control. This module suits applications that need high-resolution analog output with fault reporting.

Technical Specifications

The GE Fanuc IC670ALG330 delivers high-resolution analog output with fast update times.

• Number of Channels: Eight (8) single-ended current source outputs.
• Output Signal Range: 0-20 mA nominal, 0.0-20.48 mA absolute range.
• Output Resolution: 16 bits typical (0.3125 µA per count maximum resolution).
• Conversion Resolution: 16 bits with 14-bit hold value resolution.
• Magnitude Data Size: 14 bits.
• Channel Update Time: 1.5 ms typical per channel.
• Linearity: 1 LSB resolution value.
• Output Load Capacitance: 2000 pF maximum.
• Output Load Inductance: 0.5 Henry maximum.
• Open Wire Output Current Threshold: 1.0 mA minimum to 3.5 mA maximum.
• External Power Supply: 18 to 30 VDC (24 VDC typical) with 10% maximum ripple.
• Current from BIU: 85 mA maximum.
• Current from External Supply: 250 mA maximum (all 8 outputs at 20 mA).
• Isolation (Ground to Logic): 1500 VAC for 1 minute; 250 VAC continuous.
• Number of LEDs: 1 status indicator.

Output Channel Features and Signal Capabilities

The GE Fanuc IC670ALG330 provides eight analog output channels for precise control. Each channel outputs current between 0 and 20.48 mA with 16-bit resolution. The module uses a built-in Digital to Analog Converter (DAC) for each channel. Analog resolution reaches 0.3125 µA per count for fine adjustment. Output channels are scalable and configurable by the user. Operators can configure scaling parameters and output levels for each channel. The IC670ALG330 supports both bit data types and word data types. Output load capacitance tolerance reaches 2000 pF maximum for stable operation. Output load inductance tolerance reaches 0.5 Henry maximum for inductive loads. The module transmits data by receiving output values in engineering units from the BIU. It scales this data according to user parameter settings and calibrations.

Fault Handling and Output Hold Behavior

The GE Fanuc IC670ALG330 includes configurable output hold behavior for fault conditions. Output channels can hold their last state during several failure scenarios. These scenarios include BIU resetting the module or no output data received after timeout. The module also holds outputs when backplane power is lost. Another hold condition occurs when the module’s watchdog timer expires. When backplane power loss or watchdog expiration happens, the held value resolution reduces. The resolution drops from 16 bits to 14 bits during these hold conditions. This design provides continued control while alerting operators to system faults. The IC670ALG330 can reset to factory calibration settings at any time. All calibration data stores in the module’s flash memory for permanent retention.

Alarms and Diagnostic Features

The GE Fanuc IC670ALG330 includes comprehensive alarm and diagnostic capabilities. The module reports under-range conditions when output signals fall below normal range. Over-range alarms trigger when output currents exceed expected values. Open wire detection identifies broken field wiring connections. The minimum open wire output current threshold is 1.0 mA. Maximum open wire detection threshold is 3.5 mA for reliable fault sensing. These alarms help maintenance teams find problems quickly. The IC670ALG330 provides only one LED indicator for status monitoring. A steady glowing LED means the module is powered on and operating properly. A flashing LED indicates a fault condition that needs attention. An unlit LED means power is off or a fatal error has occurred.

Power Requirements and Isolation

The GE Fanuc IC670ALG330 requires both BIU power and external loop power. Current draw from the BIU power supply reaches 85 mA maximum. External power supply draw reaches 250 mA maximum with all 8 outputs at 20 mA. External power supply range is 18 to 30 VDC with 24 VDC nominal. Maximum ripple on the external supply is 10% for stable operation. Isolation rating from ground to logic reaches 1500 VAC for 1 minute. Continuous isolation rating is 250 VAC for normal operation. The IC670ALG330 outputs current signals only, not voltage signals. This current-source design suits long cable runs and industrial noise environments. The module receives output data from the BIU and converts it to a 0-20.48 mA signal.

Environmental Specifications and Installation

Mount the GE Fanuc IC670ALG330 in a dry, protected enclosure away from moisture. Operating temperature range is 0°C to 55°C (32°F to 131°F). This matches the temperature range of the IC670ALG240 input module. The module has an open enclosure design and requires protection from liquids. All eight output channels use single-ended wiring configuration. Keep analog output wires separated from high-voltage AC power cables. Use proper grounding techniques to reduce noise on analog signals. The IC670ALG330 requires an external 24 VDC power supply for loop power. Do not exceed 30 VDC input to prevent internal damage. The 1.5 ms update time suits many process control applications.

Package Contents

When you unbox the GE Fanuc IC670ALG330, you will find these items:

• 1 x GE Fanuc IC670ALG330 analog current-source output module.
• 1 x Terminal block for field wiring connections.
• 1 x Product label and identification tag.
• 1 x Quick reference installation guide.

Frequently Asked Questions (FAQ)

How many output channels does the IC670ALG330 have?

The **IC670ALG330** has eight (8) single-ended analog output channels. All channels provide 0-20 mA current source signals for field devices.

What is the resolution of the GE Fanuc IC670ALG330?

This module provides 16-bit typical resolution for precise analog output control. Maximum analog resolution reaches 0.3125 µA per count.

Does the IC670ALG330 support open wire detection?

Yes, the **IC670ALG330** reports open wire conditions on output channels. The open wire current threshold ranges from 1.0 mA minimum to 3.5 mA maximum.

What happens to outputs during a BIU reset?

The **IC670ALG330** can hold outputs at their last state during BIU reset conditions. Hold value resolution reduces from 16 bits to 14 bits during watchdog expiration.

What power supplies does the IC670ALG330 need?

This module draws 85 mA from the BIU power supply. It also requires an external 18-30 VDC supply drawing up to 250 mA for loop power.