GE IC670MDL740B Field Control Output Module

The GE IC670MDL740B, also cataloged as the IC670MDL740 Discrete Output Module, operates as a dedicated hardware component for 12/24 VDC sourcing signal execution within Field Control distributed I/O architectures. This 16-channel solid-state driver interface routes output logic commands to field-level inductive loads, indicator lamps, and interposition relays directly from the field bus terminal block.

Hardware Specifications

Backplane Bus Communication & IO Density Scaling

The module communicates with the Field Control bus header via the localized backplane bus communication velocity framework, delivering high-speed output image table register updates to internal driver transistors. Designed with optimized I/O density scaling geometry, all 16 sourcing outputs share a single electrical group to simplify field wiring distribution. Optocouplers provide galvanic isolation between field power and internal logic circuits, maintaining full firmware flash compatibility and scan cycle deterministic response without cross-channel electrical interference.

Frequently Asked Questions

Q: How is the module protected against overcurrent and short-circuit faults in the field?

A: The module incorporates a built-in internal fuse that provides group-level short-circuit and overcurrent protection across all 16 output points.

Q: Are the 16 output channels divided into multiple isolated groups?

A: No, all 16 channels belong to a single output group and share common power and return terminals without group-to-group isolation.

Q: What is the maximum continuous load current permitted across the entire module?

A: Each individual output channel supports up to 0.5 A resistive load, but the total combined current across all 16 channels must not exceed 4 A per module.

Field Installation Guidelines

• Remove field supply power and disconnect the I/O module from the terminal block base before performing maintenance or replacement.
• Ensure terminal base wiring screws are torqued properly to ensure low-resistance contact and prevent local terminal heating.
• Install external freewheeling flyback diodes directly across inductive DC field loads (solenoid coils, relay coils) to suppress back-EMF spikes.
• Keep 24 VDC output wiring separated from high-voltage AC cables in cabinet wire ducting to eliminate capacitive noise coupling.
• Connect terminal base shield ground lugs to the central enclosure earth grounding bus using short, low-impedance grounding straps.