GE IC670ALG330 8-Point Analog Current Output Module

Product Description

The GE Fanuc IC670ALG330 is a high-precision 8-point analog current-source output module designed for the Field Control distributed I/O platform. It delivers stable, isolated 0–20 mA control signals to field devices such as control valves, I/P converters, and analog actuators.

Unlike analog input modules, this model is strictly an output device, sourcing current to external loads with fast update rates and advanced fault monitoring. Its robust electrical isolation and external power architecture make it well-suited for electrically noisy industrial environments.

The IC670ALG330 (IC670ALG330) integrates directly with GE Fanuc Field Control Bus Interface Units, ensuring deterministic performance in process automation and power applications.

Key Functional Characteristics

The module provides eight single-ended current outputs with true 16-bit conversion resolution. Each channel is continuously monitored for underrange, overrange, and open-wire conditions, allowing the control system to react immediately to wiring or load faults.

A dedicated external 24 VDC supply powers the output stage, isolating field load current from the backplane and improving system reliability when driving multiple high-current loads simultaneously.

Technical Specifications

General

• Manufacturer: GE Fanuc

• Series: Field Control

• Module Type: Analog Current-Source Output

• Model / Part Number: IC670ALG330

• Number of Output Channels: 8

• Wiring Configuration: Single-ended

Output Characteristics

• Nominal Output Signal: 0–20 mA

• Output Signal Range: 0.0–20.48 mA

• Output Resolution: 16 bits

• Effective Resolution: 0.3125 µA per count

• Magnitude Data Size: 14 bits

• Linearity: ±1 LSB

Performance

• Channel Update Time: 1.5 ms typical

• Output Load Capacitance: 2000 pF maximum

• Output Load Inductance: 0.5 H maximum

• Open-Wire Detection Threshold:

• Minimum: 1.0 mA

• Maximum: 3.5 mA

Isolation

• Isolation Rating:

• 1500 VAC for 1 minute

• 250 VAC continuous

• Isolation Type: Channel-to-logic and field-to-bus

Power Requirements

• External Power Supply: 18–30 VDC (24 VDC typical)

• External Supply Ripple: 10% maximum

• Current Draw from External Supply:

• Up to 250 mA (all channels at 20 mA)

• Current Draw from BIU Backplane: 85 mA maximum

Indicators

• Status LEDs: 1 module status LED

Mechanical & Environmental

• Weight: Approximately 0.53–0.56 lbs (0.24–0.26 kg)

• Mounting: Field Control terminal base

• Operating Temperature: 0 °C to +60 °C

• Storage Temperature: –40 °C to +85 °C

• Humidity: 5–95% non-condensing

Typical Applications

The IC670ALG330 is commonly used in systems requiring precise analog control outputs, including:

• Process control loops (flow, pressure, temperature)

• Valve positioning and actuator control

• Power generation auxiliary systems

• Chemical, oil & gas, and water treatment plants

• Distributed Field Control architectures

FAQ

Q: Is the IC670ALG330 an analog input or output module?
A: The IC670ALG330 is strictly an analog output module. It sources 0–20 mA current signals to field devices and does not accept input signals.

Q: Does this module support 4–20 mA outputs?
A: The output range is 0–20.48 mA. A 4–20 mA control range is achieved through PLC scaling and configuration.

Q: Is an external power supply required?
A: Yes. An external 18–30 VDC power supply is required to drive the output channels.

Q: What diagnostics are supported?
A: The module reports underrange, overrange, and open-wire conditions for improved fault detection and maintenance.