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Product Overview
The GE IC693MDL742E Positive Logic Output Module is a discrete DC output module designed for GE Fanuc Series 90-30 programmable logic controller (PLC) systems. It provides an interface between the PLC control logic and external field devices, allowing automation systems to operate electrical loads such as solenoid valves, motor starters, indicator lamps, and other compatible DC-operated equipment.
As part of the Series 90-30 automation platform, the IC693MDL742E supports applications that require reliable switching of multiple discrete output signals. Its positive logic design uses a sourcing output arrangement, meaning that the module supplies current to connected loads when an output point is activated. This configuration is commonly used in industrial control circuits based on 12 V DC or 24 V DC power.
The IC693MDL742 output design provides 16 discrete output points arranged in two groups of eight. Each point supports a maximum output current of 1 A, subject to the overall group-current and ambient-temperature limitations. The module also incorporates Electronic Short Circuit Protection (ESCP), helping protect the output circuitry against specified short-circuit conditions.
LED indicators on the module provide individual output status information, making it easier for maintenance personnel to identify which channels are active during operation and troubleshooting.
The module is intended for installation in compatible Series 90-30 PLC baseplates. Before selecting it as a replacement, engineers should verify the complete catalog number, hardware revision, electrical specifications, and compatibility with the existing PLC rack.
Technical Specifications
| Parameter | Specification |
|---|---|
| Brand | GE Fanuc |
| Manufacturer | GE Fanuc / Emerson Automation |
| Model | IC693MDL742E |
| Product Type | Positive Logic DC Output Module |
| PLC Platform | Series 90-30 |
| Output Type | Discrete transistor output |
| Logic Configuration | Positive Logic / Sourcing |
| Rated Voltage | 12/24 V DC |
| Output Voltage Range | 12–24 V DC (+20%, -15%) |
| Number of Output Points | 16 |
| Output Groups | 2 groups of 8 points |
| Maximum Current per Point | 1 A |
| Maximum Group Current | 4 A at 50°C; 3 A at 60°C |
| Short-Circuit Protection | Electronic Short Circuit Protection (ESCP) |
| Field-to-Logic Isolation | 1500 V |
| Group-to-Group Isolation | 500 V |
| Maximum Output Voltage Drop | 1.2 V |
| Maximum Off-State Leakage | 1 mA |
| Maximum ON Response Time | 2 ms |
| Maximum OFF Response Time | 2 ms |
| Inrush Current | 5.2 A for 10 ms |
| Backplane Current Consumption | 130 mA from 5 V bus with all outputs ON |
| Status Indicators | Individual LED indicators |
| Dimensions Provided | 150 × 55 × 100 mm |
| Weight Provided | 0.3 kg |
| Typical Application | Industrial PLC output control |
Note: Electrical specifications are based on the IC693MDL742 module family documentation. Confirm the exact E-revision specifications and compatibility against the unit’s nameplate and applicable technical manual.
Function and Working Principle
The IC693MDL742E converts output commands from the PLC processor into electrical switching signals for external field devices. When the PLC program activates an output point, the module switches the corresponding DC output circuit to supply current to the connected load.
1. Positive Logic Output Operation
The module uses positive logic, also known as sourcing output operation.
In a typical sourcing circuit, the module provides positive DC voltage to the load when the corresponding output is activated. The field device is connected between the module output and the negative DC supply.
This arrangement allows the PLC to control compatible DC loads using individual output commands. Correct polarity and common-terminal wiring are essential for reliable operation.
2. Sixteen Independent Output Points
The module provides 16 output points divided into two groups of eight. This arrangement allows one module to control multiple field devices within a machine or process system.
Typical controlled devices include:
- Solenoid valves
- Indicator lamps
- Interposing relay coils
- Compatible motor starters
- DC control relays
- Other low-voltage industrial loads
Each output point can be controlled independently by the PLC program, subject to the module’s electrical and group-current limits.
3. Electronic Short Circuit Protection
The IC693MDL742 design includes Electronic Short Circuit Protection (ESCP). This protection feature helps protect the output circuitry when specified short-circuit conditions occur.
The module’s protection arrangement should not be treated as a substitute for appropriate system-level electrical protection. Engineers should follow the manufacturer’s wiring instructions and ensure that field devices and power supplies are correctly rated.
4. LED Output Status Indication
The module includes individual LED indicators for its output points. These indicators allow technicians to observe the ON/OFF status of each channel.
During commissioning and maintenance, the LEDs can help identify whether the PLC is commanding a particular output. However, an illuminated LED does not necessarily prove that the connected field device is functioning correctly. Field voltage, wiring continuity, and load condition should also be checked.
5. Electrical Isolation
The module provides isolation between the field side and PLC logic side, as well as isolation between the two output groups.
This isolation helps separate field wiring conditions from the PLC backplane circuitry. Correct grounding, wiring, and power-supply design remain necessary for safe and stable operation.
Role in Industrial Control Systems
The IC693MDL742E performs the output-control function in a Series 90-30 PLC system. It receives control information from the PLC through the backplane and switches external field devices according to the logic program.
PLC-Based Machine Control
A PLC monitors input signals from sensors, switches, and other field devices. Based on the control program, it activates output points to operate connected equipment.
For example, when a sensor detects a product at a conveyor station, the PLC may activate a solenoid valve or relay through the IC693MDL742E. The module provides the electrical output required to operate the connected device.
Solenoid Valve Control
Solenoid valves are widely used in pneumatic and hydraulic automation systems. The IC693MDL742E can control compatible DC solenoid loads when their voltage and current requirements are within the module’s limits.
This allows PLC logic to coordinate valve operation with sensors, machine sequences, and safety interlocks.
Relay and Contactor Interface
The module can also operate compatible DC relay coils and control-interface circuits. These relays may then switch other electrical loads through appropriately rated contacts.
The coil current and switching characteristics must be checked before connecting a relay directly to an output point.
Process Status and Indication
Output channels can operate indicator lamps and other signaling devices. This enables a PLC-controlled machine to provide visible operating information, such as equipment running status, valve activation, or process-stage indication.
Industrial Applications
The GE Fanuc IC693MDL742E is suitable for compatible low-voltage DC output-control applications in industrial automation.
1. Manufacturing Automation
In manufacturing equipment, discrete output modules control actuators, relays, and indicators according to the PLC program.
The 16-point arrangement allows several control signals to be handled by one module, helping organize machine-level wiring and control functions.
2. Pneumatic Control Systems
Pneumatic equipment commonly uses electrically operated solenoid valves to control air supply and actuator movement.
The IC693MDL742E can operate compatible 12 V DC or 24 V DC solenoid loads, allowing the PLC to coordinate pneumatic cylinders and other actuators with the production sequence.
3. Conveyor Systems
Conveyor equipment uses discrete output signals to control auxiliary devices such as relay interfaces, indicators, and compatible actuators.
The module can support these functions as part of a Series 90-30 PLC installation, provided that the connected loads remain within the specified current limits.
4. Packaging Machinery
Packaging machines often require multiple output signals to coordinate feeding, clamping, sorting, and product-handling operations.
The IC693MDL742E can provide discrete output channels for compatible DC control devices. Its LED indicators can also assist technicians when checking machine sequences and output status.
5. Material Handling Equipment
Automated material-handling systems may use solenoid valves, relays, and signaling devices to control equipment movement.
When integrated with the PLC program, the module can activate these devices in response to sensor signals and programmed operating conditions.
6. General Industrial Process Control
The module may also be used in industrial process systems that rely on discrete DC signals for actuator operation and equipment indication.
Its application should be evaluated according to output voltage, current demand, switching frequency, environmental conditions, and the requirements of the complete control system.
Installation and System Integration
Proper installation is essential for reliable operation and electrical compatibility.
1. Verify PLC Baseplate Compatibility
The IC693MDL742E is designed for the GE Fanuc Series 90-30 PLC platform. It can be installed in a compatible I/O slot of an appropriate Series 90-30 baseplate.
Before installation, verify the rack configuration, slot availability, module revision, and PLC hardware documentation.
2. Check the DC Power Supply
The module is designed for 12/24 V DC field-device circuits. Confirm that the external power supply provides the correct voltage and sufficient current capacity for the connected loads.
The field devices require an appropriate external power source; the PLC backplane supply should not be assumed to provide the operating power for all field loads.
3. Confirm Positive Logic Wiring
Because the module uses sourcing outputs, field wiring must follow the positive logic arrangement.
The load is connected between the module output and the negative DC supply. Incorrect polarity or wiring can prevent the connected device from operating correctly.
4. Observe Output Current Limits
Each output point has a maximum current rating of 1 A. The maximum current for each group is also limited and depends on ambient temperature.
The documented group limits are 4 A at 50°C and 3 A at 60°C. Engineers must calculate the combined load current rather than evaluating each output point independently.
5. Connect Field Devices
Before connecting solenoid valves, relay coils, or other loads, verify their rated voltage, steady-state current, inrush current, and switching characteristics.
Where inductive loads are used, apply suitable suppression measures according to the device and module manufacturer’s recommendations.
6. Verify LED Status and Output Operation
After wiring, test each output point individually. Confirm that the corresponding LED responds to the PLC command and that the connected field device operates correctly.
Check the actual field voltage and load current if an output does not behave as expected.
7. Follow Electrical Safety Procedures
Disconnect power before installing or removing the module. Follow lockout and verification procedures, use appropriate protective equipment, and observe the applicable industrial electrical standards.
Compatible System Components
The IC693MDL742E is designed to operate as part of a Series 90-30 PLC system.
| Component | Function | Integration Considerations |
|---|---|---|
| GE Fanuc Series 90-30 CPU | Executes the PLC control program | Verify CPU and rack compatibility |
| Series 90-30 Baseplate | Provides module mounting and backplane connections | Confirm supported baseplate configuration |
| 12/24 V DC Power Supply | Supplies external field-device power | Ensure adequate current capacity |
| Discrete Input Module | Receives signals from sensors and switches | Coordinate input logic with PLC output sequences |
| Solenoid Valve | Converts electrical output into pneumatic or hydraulic action | Verify voltage and coil current |
| Interposing Relay | Provides an interface for other electrical loads | Check coil current and contact ratings |
| Indicator Lamp | Provides visual operating status | Confirm voltage and current compatibility |
| Terminal Block | Organizes field wiring | Follow the module’s wiring diagram |
| Industrial Sensors | Provide feedback to the PLC | Configure corresponding PLC input logic |
The components listed above are examples of equipment used in a complete control system. They are not necessarily included with the IC693MDL742E.
Alternative Models and Replacement Considerations
When replacing an IC693MDL742E, the replacement must match the required electrical and functional characteristics.
| Related Model | Description | Replacement Considerations |
|---|---|---|
| IC693MDL740 | 12/24 V DC positive logic output module | Compare output current, protection, and channel arrangement |
| IC693MDL741 | Related DC positive logic output module | Verify voltage, current, and output configuration |
| IC693MDL748 | 48/24 V DC positive logic output module | Different voltage range and point configuration |
| IC693MDL753 | 12/24 V DC positive logic output module | Compare channel count and current rating |
| IC693MDL754 | 12/24 V DC positive logic output module with ESCP | Verify channel count and individual output ratings |
| IC693MDL742 | Base catalog-number designation for the IC693MDL742 family | Confirm revision and exact hardware compatibility |
A related catalog number should not be assumed to be a direct replacement. Before substitution, check:
- Output voltage range.
- Positive or negative logic configuration.
- Number of output points.
- Current rating per point.
- Maximum current per output group.
- Short-circuit protection arrangement.
- Isolation specifications.
- PLC baseplate compatibility.
- Hardware revision and wiring requirements.
For an existing Series 90-30 installation, retaining the same catalog number and a compatible revision is generally the simplest replacement approach, subject to the manufacturer’s documentation.
Key Advantages
Sixteen Discrete Output Channels
The module provides 16 output points in two groups of eight, allowing multiple field devices to be controlled from one PLC I/O module.
Positive Logic Sourcing Operation
Its sourcing output arrangement supports compatible 12/24 V DC field circuits commonly used in industrial control systems.
Electronic Short Circuit Protection
The ESCP feature provides additional protection for the specified output circuits and supports dependable operation under appropriate conditions.
Individual LED Indicators
Channel-level LED indicators make it easier to monitor output status during commissioning, operation, and troubleshooting.
Electrical Isolation
Isolation between the field side and logic side helps separate external wiring conditions from the PLC backplane circuitry.
Series 90-30 Integration
The module is designed for use in compatible GE Fanuc Series 90-30 PLC systems, making it relevant to maintenance and replacement projects involving this platform.
Technical FAQs
1. What is the GE IC693MDL742E?
The IC693MDL742E is a positive logic DC output module for the GE Fanuc Series 90-30 PLC system. It provides 16 output points for controlling compatible industrial field devices.
2. What is the rated voltage?
The module is designed for 12/24 V DC output circuits, with a documented output voltage range of 12 to 24 V DC (+20%, -15%).
3. How many output points does it provide?
It provides 16 discrete output points arranged in two groups of eight.
4. What is the maximum output current?
The maximum output current is 1 A per point. The group-current limit is 4 A at 50°C and 3 A at 60°C.
5. What does positive logic mean?
Positive logic means the module uses a sourcing output arrangement. When an output is activated, it supplies positive DC current to the connected load.
6. Does the module have short-circuit protection?
Yes. The IC693MDL742 design includes Electronic Short Circuit Protection (ESCP). Correct field wiring and suitable external protection are still required.
7. Can it control solenoid valves?
Yes, it can control compatible 12/24 V DC solenoid valves when their current requirements and switching characteristics remain within the module’s specifications.
8. What PLC system is it designed for?
It is designed for the GE Fanuc Series 90-30 PLC platform and must be installed in a compatible baseplate.
9. How can technicians identify an active output?
Each output point has an LED indicator that displays its ON/OFF status. Field voltage and load operation should also be checked during troubleshooting.
10. What should be checked before purchasing a replacement?
Verify the complete catalog number, hardware revision, output voltage, channel count, current ratings, logic configuration, and physical condition. Confirm that the replacement is compatible with the existing Series 90-30 PLC system.
Procurement and Maintenance Recommendations
When purchasing the GE IC693MDL742E, confirm the complete part number and revision shown on the product label. The suffix is important because hardware revisions and product configurations should be checked against the original installation documentation.
For used or refurbished modules, inspect the terminal area, housing, connectors, and LED indicators. Ask the supplier about functional testing, storage conditions, and warranty coverage. For critical equipment, request suitable test records before installation.
During routine maintenance, inspect field wiring and terminal connections for looseness, corrosion, or overheating. Check the external DC power supply and verify that the total load current remains within the module’s per-point and group limits.
If an output channel does not operate correctly, check the PLC program state, output LED, field supply voltage, wiring polarity, and connected load before concluding that the module has failed.
Keep a record of module revisions, PLC rack locations, wiring assignments, and replacement history. This information can reduce troubleshooting time and help maintain older Series 90-30 control systems.
Conclusion
The GE IC693MDL742E Positive Logic Output Module is a 16-point DC output component designed for GE Fanuc Series 90-30 PLC systems. With a 12/24 V DC output range, a maximum current rating of 1 A per point, positive logic sourcing operation, and Electronic Short Circuit Protection, it provides a practical interface between PLC logic and compatible industrial field devices.
Its two groups of eight output points, individual LED indicators, and electrical isolation support applications involving solenoid valves, relays, indicators, and other DC-operated equipment.
For maintenance and replacement projects, verifying the complete catalog number, revision, output-current requirements, and baseplate compatibility is essential for reliable integration into an existing industrial automation system.