Product Overview

The GE Fanuc IC670ALG620 is a Field Control RTD input module for temperature measurement applications. This module connects RTD temperature sensors to a GE Field Control station for monitoring or control. Engineers use the IC670ALG620 to read temperature from copper, nickel, or platinum RTD sensors. Its four input channels accept both 3-wire and 4-wire RTD configurations. This module suits applications that need accurate temperature monitoring in distributed control systems.

Technical Specifications

The GE Fanuc IC670ALG620 delivers precise temperature measurement with comprehensive fault detection.

• Number of Channels: Four (4) independent RTD inputs.
• RTD Sensor Compatibility: 3-wire and/or 4-wire RTDs (copper, nickel/iron, nickel, or platinum).
• Resistance Ranges: 0 to 500 ohms or 0 to 3000 ohms (selectable).
• Digital Resolution: 15 bits plus sign.
• Scan Time (60 Hz): 210 ms for all channels.
• Scan Time (50 Hz): 230 ms for all channels.
• Normal Mode Rejection: 60 dB at 50/60 Hz, 100% span.
• Maximum Lead Resistance: 5 ohms per lead.
• Temperature Sensitivity (0 to 60°C): ±0.004% of reading, ±1.5 mV per °C referred to input.
• Current Drawn from BIU: 190 mA maximum.
• Fault Detection Features: Open RTD, input short, underrange, overrange, and high/low alarm.
• Status Indicator: One (1) front panel LED.

RTD Sensor Compatibility and Channel Configuration

The GE Fanuc IC670ALG620 works with multiple RTD sensor types. Compatible sensor materials include copper, nickel/iron, nickel, or platinum elements. The module accepts both 3-wire and 4-wire RTD connection configurations. Users can choose among several RTD types according to pre-defined tables in the module. Two resistance ranges are available for different sensor types. Select 0 to 500 ohms for standard platinum RTDs. Select 0 to 3000 ohms for high-resistance or nickel-based sensors. If any channel is not used in your application, you can configure it as inactive. This flexibility allows the IC670ALG620 to adapt to various temperature measurement needs. The maximum lead resistance is 5 ohms per lead for accurate readings.

Field Control Station Integration

The GE Fanuc IC670ALG620 integrates into a Field Control station with a Bus Interface Unit (BIU). Up to 8 Field Control modules of any type can connect to a single BIU. These 8 modules together with the BIU form a complete Field Control station. This station is equivalent to a modular PLC system for industrial control. Configuration of the IC670ALG620 is done through the main BIU. Use a hand-held device connected to the BIU for module setup. The BIU serves as the central processing unit for the distributed control system. Users can access several configuration options through GE’s proprietary BIU interface. This architecture allows the IC670ALG620 to work seamlessly with other Field Control I/O modules.

Scan Time and Resolution Performance

The GE Fanuc IC670ALG620 provides fast scanning for temperature monitoring applications. Scan time reaches 210 ms at 60 Hz power line frequency. Scan time reaches 230 ms at 50 Hz power line frequency for global compatibility. Normal mode rejection reaches 60 dB at both 50 Hz and 60 Hz. This high rejection ratio eliminates line frequency noise from temperature readings. Digital resolution is 15 bits plus sign for accurate temperature representation. Temperature sensitivity stays at ±0.004% of reading from 0 to 60°C. Additional sensitivity of ±1.5 mV per °C referred to input ensures stable readings. The IC670ALG620 converts RTD resistance changes into digital temperature values. This conversion supports precise monitoring of industrial processes.

Fault Detection and Diagnostic Features

The GE Fanuc IC670ALG620 includes comprehensive fault detection for reliable operation. The module detects open RTD sensor conditions on any input channel. Input short detection identifies wiring problems between RTD leads. Underrange alarms trigger when temperature falls below sensor limits. Overrange alarms trigger when temperature exceeds expected values. High and low alarm limits are configurable for each channel. These diagnostic features help maintenance teams find problems quickly. The IC670ALG620 has only one status LED at the front of the module. A steady glowing LED indicates normal module operation. An unlit LED means the module has no power. A flashing LED indicates a fault condition in the module that needs attention.

Installation and Wiring Guidelines

Mount the GE Fanuc IC670ALG620 by inserting it into an I/O Terminal Block. The terminal block connects to the main Bus Interface Unit in the system. This simple insertion makes the module easy to install or replace. Use 3-wire or 4-wire RTD connections for best accuracy. Keep lead resistance below 5 ohms per lead for each RTD sensor. The module draws a maximum of 190 mA from the BIU power supply. Operating temperature range matches other Field Control modules (0 to 60°C). The IC670ALG620 has an open enclosure design requiring protection from moisture. Use shielded twisted-pair wiring for RTD connections. Proper grounding reduces noise and ensures stable temperature readings.

Package Contents

When you unbox the GE Fanuc IC670ALG620, you will find these items:

• 1 x GE Fanuc IC670ALG620 Field Control RTD input module.
• 1 x Terminal block for RTD 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 IC670ALG620 have?

The **IC670ALG620** has four (4) independent RTD input channels. Each channel accepts 3-wire or 4-wire RTD sensors.

What RTD sensor types work with the GE Fanuc IC670ALG620?

This module works with copper, nickel/iron, nickel, or platinum RTD sensors. The choice is made from pre-defined tables in the module.

What diagnostic features does the IC670ALG620 include?

The **IC670ALG620** detects open RTD, input short, underrange, overrange, high alarm, and low alarm conditions. These features help identify sensor or wiring problems.

How many modules can connect to one BIU with the IC670ALG620?

Up to 8 Field Control modules of any type can connect to a single Bus Interface Unit. The **IC670ALG620** can be mixed with other I/O modules in the station.

What does the front LED on the IC670ALG620 indicate?

A steady LED means normal module operation. An unlit LED means no power. A flashing LED indicates a fault condition in the **IC670ALG620** module.