GE Fanuc Field Control IC670MDL640 16-Point 24VDC Input Module

Product Overview

The IC670MDL640 (IC670-MDL-640) is a 16-point, 24 VDC digital input module designed for the GE Fanuc Field Control I/O system. This module serves as the interface between the control system and various field sensing devices, such as proximity switches, pushbuttons, and limit switches. Engineered for "Positive Logic" (Sinking) input signals, the IC670MDL640 provides reliable status monitoring in a compact, modular format. It is a critical component for distributed I/O architectures where high-speed signal processing and galvanic isolation are required to protect the central controller from field-side electrical interference in industries like automotive assembly and packaging.

Technical Configuration

The module features 16 discrete input points, typically organized into two groups of eight. Each group shares a common return, reducing the complexity of the field wiring. The IC670MDL640 is designed to be "plug-and-play" within a Field Control terminal base (like the IC670CHS001 or IC670CHS002), allowing for hot-swap capability. It includes individual LED indicators for each of the 16 channels to provide immediate visual confirmation of the input state, as well as an "OK" LED to monitor the internal health of the module’s logic circuitry.

Technical Specifications

Technical FAQs

What is "Positive Logic" in the context of this module?

"Positive Logic" (also known as Sinking) means the input module receives current from the field device. In this setup, the field sensor acts as a "source" by connecting the 24V+ line to the module's input terminal when the sensor is activated.

Can I adjust the sensitivity of the inputs to filter out electrical noise?

Yes. The IC670MDL640 features configurable digital filter times (typically 1.0 ms or 8.0 ms). A longer filter time is useful in environments with significant electromagnetic interference (EMI) to prevent "chattering" or false triggers, while a shorter time is better for high-speed counting or detection.

Is this module compatible with 2-wire sensors?

Yes, provided the 2-wire sensor's "Off-state leakage current" is lower than the module's maximum Off-state current threshold (typically < 1.5 mA). If the leakage is too high, the module may stay in the "ON" state even when the sensor is deactivated.

Engineering & Installation Guide

• Terminal Base Selection: The IC670MDL640 must be used with an IC670CHS series terminal base. The base provides the mechanical DIN-rail mounting and the electrical connections for the local I/O bus. Ensure the module is firmly seated and the locking tabs are engaged to maintain electrical continuity.

• Wiring Best Practices: To minimize noise induction, keep the 24 VDC input wiring physically separated from high-voltage AC power lines. Use twisted-pair wiring for long runs (over 30 meters) to ensure the 7.0 mA signal remains clean and detectable.

• Redundant Power: If the inputs are used for critical interlocks, consider using a redundant 24 VDC power supply for the field-side voltage. If the field power fails, all 16 inputs will go to "OFF," which could trigger a system-wide safety shutdown.