GE Fanuc IC670ALG620 4-Point RTD Input Block

Overview:
The IC670ALG620 from GE Fanuc is an analog input module supporting up to four independent RTDs. It accommodates 3-wire or 4-wire configurations and is compatible with platinum, nickel, nickel/iron, and copper RTDs. The module provides precise temperature measurement and resistance monitoring for Genius I/O systems.

Key Features:

• Channels: 4 independent RTD inputs (3-wire or 4-wire)

• Supported RTD Types: Platinum (10, 25, 100, 1000 Ω), Copper (10, 100 Ω), Nickel (50, 100, 120 Ω), Nickel/Iron (604, 1000 Ω)

• Resistance Range: 0–500 Ω, 0–3000 Ω

• Measurement Units: Resistance or Temperature (°C / °F)

• Accuracy: ±0.15% of reading, ±0.3 to 0.5°C at 25°C

• Temperature Sensitivity: ±0.004% of reading, ±1.5 µV per °C (0–60°C)

• Maximum Lead Resistance: 5 Ω per lead

• Scan Time: 60 Hz: 210 ms per point, 50 Hz: 230 ms per point

• Digital Resolution: 15 bits plus sign

• Power Supply: No loop power required; module provides excitation current

• Current Drawn from BIU: 190 mA maximum

• Operating Temperature: 0–55°C

• Fault Detection: Open RTD, input short, overrange, underrange, high/low alarms

• Isolation Ratings: Input to logic: 1500 VAC for 1 min; channel-to-channel: 250 VAC continuous; common-mode voltage: 250 Vrms (350 VDC peak AC); normal mode voltage: 28 VDC peak AC max

• Mode Rejection: Normal mode: 60 dB at 50/60 Hz; common mode: 120 dB at 50/60 Hz (100 Ω imbalance)

• Indicators & Diagnostics: LED shows ON (normal), flashing (module fault), OFF (power loss/fatal fault)

Applications:

• Precision temperature and resistance monitoring in distributed control systems

• RTD interfacing for process control and industrial instrumentation

• Integration into Genius I/O networks for real-time analog input processing

• Suitable for high-noise or electrically challenging industrial environments

FAQ:
Q: Is this module compatible with all Genius I/O systems?
A: Yes, it integrates seamlessly with standard GE Fanuc Genius I/O architectures.

Q: Can it handle different RTD types?
A: Yes, it supports platinum, copper, nickel, and nickel/iron RTDs in 3- or 4-wire configurations.

Q: Does it require external loop power?
A: No, the module supplies excitation current internally.