PACSystems RX3i | GE Fanuc | IC694MDL754 32-Point 24VDC Positive Logic Output Module

Module Engineering Overview

The IC694MDL754 is a high-density discrete output module designed for the GE Fanuc (now Emerson) RX3i PACSystems controller architecture. It provides 32 high-speed switching points, partitioned into two isolated groups of 16 channels each. Engineered for reliability in demanding control environments, this module supports positive logic (sourcing) output for 12VDC or 24VDC actuators. To ensure operational longevity, the IC694MDL754 includes advanced internal circuitry for thermal monitoring, overcurrent protection, and short-circuit recovery, significantly reducing downtime in the event of field-side wiring faults.

Technical Specification Summary

The following parameters define the electrical and functional capabilities of the IC694MDL754 (Part Number: IC694MDL754).

• Output Capacity: 32 Discrete Channels

• Logic Type: Positive Logic (Sourcing)

• Voltage Rating: 12/24 Volts DC (Operating Range: 10.2 to 30.0 VDC)

• Current per Point: 0.75 Amps (Continuous)

• Peak Inrush Current: 3.0 Amps

• Isolation (Field-to-Backplane): 250 VAC continuous; 1500 VAC (1 minute test)

• Isolation (Group-to-Group): 250 VAC continuous; 1500 VAC (1 minute test)

• Backplane Power Demand: 300 mA at 5 VDC

• Switching Speed: 0.5 ms maximum (On/Off)

• Diagnostic Indicators: 32 Individual status LEDs (one per point)

• Compatible Connectors: Box-style (IC694TBB032) or Spring-style (IC694TBS032)

• Physical Weight: 0.40 kg (0.88 lbs)

Deployment and Compatibility

The IC694MDL754 is specifically engineered for high-density I/O clusters where control cabinet space is at a premium. Each 16-channel group is galvanically isolated, allowing the module to drive independent load power supplies if necessary. Note that this module requires an external terminal block assembly (IC694TBB032 or IC694TBS032), which must be ordered separately to facilitate field wiring.

Common Technical Questions

What happens if a short circuit occurs on an output channel?The IC694MDL754 is equipped with auto-recovery protection. If a short circuit or overcurrent condition is detected, the channel will disable the output. Once the fault is cleared, the module automatically resets, eliminating the need for manual fuse replacements.

Is this module compatible with negative logic systems?No. This module is strictly designed for positive logic (sourcing) applications. For sinking/negative logic requirements, please refer to the appropriate sourcing-compatible modules in the RX3i catalog.