IC693MDL740 GE Fanuc Series 90-30 | 16-Point 12/24VDC 0.5A Positive Logic Output Module

Technical Overview

The IC693MDL740 is a high-density discrete output module designed for the GE Fanuc Series 90-30 PLC platform. This module provides 16 sourcing (positive logic) output points, organized into two isolated groups of eight. It is specifically engineered to interface with 12V or 24V DC field devices, such as solenoid valves, small DC contactors, and pilot lights. By utilizing a sourcing configuration, the IC693MDL740 switches the positive side of the DC supply to the load, which is the preferred standard for many industrial safety and control architectures.

Detailed Engineering Specifications

The following technical data outlines the electrical and thermal constraints for the IC693MDL740 module. Maintenance engineers should note that while the unit is officially discontinued by the OEM, it remains a vital component for legacy system support.

Installation and Thermal Considerations

When integrating the IC693MDL740, it is essential to calculate the total current per common terminal. Each group of eight outputs shares a common power input, limited to 2 Amperes total. If all eight outputs in a group are active simultaneously, the average load per point must not exceed 0.25A to stay within the group’s thermal and electrical limits. For applications requiring higher current per point at high density, external interposing relays are recommended.

Comparison: IC693MDL740 vs. IC693MDL741

While both modules offer 16 points for the Series 90-30 PLC, the primary distinction lies in the logic type:

• IC693MDL740: Positive Logic (Sourcing). Current flows from the PLC module to the load.

• IC693MDL741: Negative Logic (Sinking). The PLC module provides the ground path for the load.

Technical FAQ

How is the module protected against field-side faults?

The IC693MDL740 includes internal fuses to protect the module’s circuitry. However, these fuses are typically not user-replaceable. It is highly recommended to use external fast-acting fuses for each output point or group to prevent permanent module damage during a short circuit.

Can I mix 12V and 24V loads on the same module?

Yes, but only between different groups. Since there are two isolated groups, you can supply Group A with 12VDC and Group B with 24VDC, provided they share the same logic ground reference as required by the system architecture.