Product Overview

The GE Fanuc IC670ALG240 is a 16-point analog current source input module from the Field Control series. This module installs along a Bus Interface Unit (BIU) and expansion rack. Engineers use the IC670ALG240 to interface pressure, level, flow, and temperature transmitters. Its sixteen single-ended input channels accept 0-20 mA or 4-20 mA analog signals. This module suits applications that need high-resolution current measurement from multiple field devices.

Technical Specifications

The GE Fanuc IC670ALG240 delivers high-resolution analog input with advanced filtering.

• Number of Channels: Sixteen (16) single-ended input channels in one group.
• Input Signal Range: 0-20 mA or 4-20 mA (nominal), 0.0-20.48 mA range, 0-25 mA absolute.
• Maximum Current Input: 35 mA (over-range protection).
• Digital Resolution: 16 bits.
• ADC Conversion Resolution: 16 bits.
• Input Current Span for 16 bits: 0 to 25 mA.
• Hardware Filter: Active RC 2nd order filter.
• Common Mode Rejection: 86 dB (channel to ground).
• Frequency Support: 50 Hz and 60 Hz for data acquisition.
• Ripple Tolerance: 10% maximum on loop power supply.
• External Power Supply: 20-28 VDC (24 VDC nominal).
• Current Drawn from BIU: 251 mA maximum.
• Isolation (Ground to Logic): 1500 VAC for 1 minute; 250 VAC continuous.
• Input Grouping: Single group with shared common.
• Loop Wiring Support: ANSI Type 2 (2-wire) and ANSI Type 3 (3-wire) transmitters.

Input Channel Features and Signal Compatibility

The GE Fanuc IC670ALG240 connects to many industrial field devices. These devices include pressure, level, flow, temperature, and turbidity transmitters. The module also interfaces with panel meters, data loggers, and single-loop controllers. Variable frequency drives (VFDs), signal splitters, and signal isolators work with this module. Each channel uses single-ended wiring configuration for simple installation. All sixteen channels belong to a single input group for straightforward wiring. The module accepts 2-wire or 3-wire current transmissions from field sensors. At one time, the IC670ALG240 can take in 16 loop inputs using a common power supply. This design reduces wiring complexity and power supply costs.

Analog to Digital Conversion and Filtering

This input module includes a built-in ADC for each input channel. Each ADC converts analog data to digital format with 16-bit resolution. The input current span for 16 bits ranges from 0 to 25 mA. An active RC 2nd order hardware filter reduces high-frequency noise on inputs. The module supports both 50 Hz and 60 Hz frequencies for global power compatibility. Common mode rejection reaches 86 dB from channel to ground. This high rejection ratio improves measurement accuracy in noisy environments. The GE Fanuc IC670ALG240 offers advanced filtering options. These options include input filter, line filter, and averaging filter for stable readings.

Diagnostics and Alarm Features

The GE Fanuc IC670ALG240 is an intelligent module with built-in diagnostics. It can report over-range and open wire alarms to the host system. Operators can configure these alarms based on their application needs. The module performs internal diagnostic checks automatically. These checks include module not calibrated, calibration data out of range, and calibration write failure. Other diagnostics include ready to calibrate, invalid command, and A/D conversion incomplete. The IC670ALG240 also checks for factory calibration not available status. Individual channel high and low alarms trigger when signals exceed setpoints. Under-range and over-range conditions are detected for each channel. The Channel Active mode lets you set a specific channel as active or inactive.

Calibration and Data Storage

The GE Fanuc IC670ALG240 input module can be easily calibrated by users. Calibration data stores directly in the module’s flash memory. This non-volatile storage retains calibration even after power cycling. The module supports both word and bit data types for flexible programming. Temperature coefficient ratings ensure stable operation across varying temperatures. Typical temperature coefficient is ±0.002% of value per degree C. Maximum temperature coefficient reaches ±0.005% of value per degree C. The IC670ALG240 operates at a nominal 24 VDC supply voltage. Current loop power supply requires 20-28 VDC with 10% maximum ripple. The module draws a maximum of 251 mA from the BIU power supply.

Environmental Specifications and Installation

Mount the GE Fanuc IC670ALG240 in a dry, protected enclosure away from moisture. Operating temperature range is 0°C to 55°C (32°F to 131°F). This range is slightly narrower than the 60°C limit of smaller modules. The module has an open enclosure design and requires protection from liquids. Isolation from ground to logic reaches 1500 VAC for 1 minute. Continuous isolation rating is 250 VAC for normal operation. Use a common power supply for the BIU and the IC670ALG240 in standard applications. For isolated applications, use a separate power supply for loop power. Proper grounding reduces noise and ensures accurate analog readings. Keep analog input wires separated from high-voltage AC power cables.

Package Contents

When you unbox the GE Fanuc IC670ALG240, you will find these items:

• 1 x GE Fanuc IC670ALG240 analog current source input 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 channels does the IC670ALG240 have?

The **IC670ALG240** has sixteen (16) single-ended input channels. All channels belong to a single group and share a common power supply.

What is the resolution of the GE Fanuc IC670ALG240?

This module provides 16-bit digital resolution for accurate current measurement. The input current span for 16 bits ranges from 0 to 25 mA.

Does the IC670ALG240 support 3-wire transmitters?

Yes, the **IC670ALG240** supports ANSI Type 2 (2-wire) and ANSI Type 3 (3-wire) transmitter wiring. This flexibility suits many field device types.

What diagnostic features does the IC670ALG240 offer?

This module reports over-range and open wire alarms. It also performs internal diagnostics including calibration status, A/D conversion checks, and channel alarms.

What is the current draw from the BIU for the IC670ALG240?

The **IC670ALG240** draws a maximum of 251 mA from the BIU power supply. External loop power requires 20-28 VDC with 10% maximum ripple.