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- TM3DQ16RG
- Discrete Output Module
- France
- 90 × 84.6 × 27.4 mm
- 0.145 kg
- Xiamen, China
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1. Product Overview
The Schneider Electric TM3DQ16RG is a discrete output expansion module in the Modicon TM3 series, designed to extend the output capacity of compatible programmable logic controllers (PLCs). It provides 16 digital output channels for controlling external devices in industrial automation systems.
The module is designed for applications that require PLC-controlled switching of field devices such as indicator lamps, interface relays, contactor control circuits, and compatible solenoid valves. Its transistor output design supports electronic switching without the mechanical contacts used in relay output modules, making it suitable for applications where faster switching and frequent output changes are required.
The TM3DQ16RG uses 24 V DC transistor outputs and removable spring-clamp terminals. Spring-clamp connections can simplify field wiring and help maintain secure electrical connections when installed correctly. Individual channel indicators assist engineers during installation, commissioning, and troubleshooting.
As part of the Modicon TM3 expansion platform, the TM3DQ16RG is intended for use with compatible Modicon M221, M241, M251, and M262 controller configurations, subject to the relevant system requirements. It communicates with the controller through the TM3 expansion interface and executes output commands generated by the PLC program.
The TM3DQ16RG is suitable for machine automation, packaging equipment, material handling, assembly systems, and other applications that require multiple 24 V DC digital output channels. Before installation, engineers should verify the output logic, electrical load, common connections, and controller compatibility against the official technical documentation.
2. Technical Specifications
| Parameter | Specification |
|---|---|
| Brand | Schneider Electric |
| Model | TM3DQ16RG |
| Product Series | Modicon TM3 |
| Product Type | Discrete Output Expansion Module |
| Number of Outputs | 16 |
| Output Type | Transistor |
| Output Supply Voltage | 24 V DC |
| Output Logic | Positive logic (source) |
| Output Technology | Solid-state transistor switching |
| Output Current | Refer to the official load and channel-rating tables for the applicable configuration |
| Terminal Type | Removable spring-clamp terminal block |
| Channel Status Indicators | Individual output status LEDs |
| Protection Rating | IP20 |
| Mounting | Compatible DIN rail or panel mounting arrangement |
| Dimensions (H × W × D) | 90 × 84.6 × 27.4 mm, as supplied |
| Weight | 0.145 kg |
| Compatible Controller Families | Modicon M221, M241, M251, and M262, subject to configuration compatibility |
Specification note: The dimensions and weight above follow the information supplied for this product. Confirm the dimensional orientation and the electrical output ratings against the official TM3DQ16RG technical documentation before finalizing a cabinet design or connecting field loads.
3. Function and Working Principle
The TM3DQ16RG converts digital output commands from a compatible PLC into electrical switching signals for external devices. It provides 16 output channels, allowing the controller to operate multiple field circuits through one expansion module.
3.1 Digital Output Control
A PLC program determines when an output channel should be activated or deactivated. The controller transfers the relevant output state through the TM3 expansion interface, and the TM3DQ16RG switches the corresponding transistor output.
For example, a machine sequence may require an indicator lamp to illuminate when a production step begins. The PLC activates the assigned output channel, and the module supplies the required switching signal to the compatible load.
The module performs the electrical output function; the application logic, operating sequence, interlocks, and fault-handling strategy remain the responsibility of the controller program.
3.2 Transistor Switching Technology
Unlike relay outputs, transistor outputs use electronic switching components rather than mechanical contacts. This makes them suitable for applications that require frequent switching and predictable electronic response.
Transistor outputs are commonly used for DC control circuits, including interface relays, signal indicators, and compatible electronic loads. They should not be treated as universal contacts capable of switching any AC or DC load.
The TM3DQ16RG must be connected only to loads that meet the specified output voltage, current, polarity, and load-type requirements.
3.3 Positive-Logic Output Operation
The TM3DQ16RG uses positive-logic, or source-type, output technology. In a typical arrangement, an activated output supplies the positive-side switching signal to a compatible DC load.
The external load’s return connection and the module’s common wiring must follow the manufacturer’s circuit diagram. Incorrect polarity or common wiring may prevent the load from operating correctly and can damage connected equipment.
3.4 Multi-Channel Output Operation
With 16 discrete outputs, the module can control several independent field circuits. These outputs may operate in parallel as part of a PLC-controlled sequence, provided that the channel ratings, group limits, and power requirements are respected.
The total current drawn by simultaneously activated channels must remain within the permitted module and group limits. Engineers should not assume that every output can continuously operate at its individual maximum rating at the same time.
3.5 Output Status Monitoring
Individual output indicators provide visual feedback about channel states. During commissioning, an engineer can compare the PLC command, the output LED, and the actual response of the field device.
If the indicator shows the expected state but the load does not operate, possible causes include an open circuit, incorrect wiring, an unsuitable load, insufficient supply voltage, or a failed external device. A systematic electrical check is required to identify the actual fault.
4. Role in Industrial Control Systems
The TM3DQ16RG functions as a digital output interface between a compatible PLC and external DC control circuits.
4.1 Expanding PLC Output Capacity
A controller may have insufficient onboard digital outputs for a machine’s indicators, interface relays, valves, and auxiliary devices. Adding a TM3DQ16RG can increase the available output count without replacing the main controller, provided the system supports the additional module.
The final expansion capacity depends on the controller model, installed modules, power budget, and supported hardware arrangement.
4.2 Controlling DC Field Devices
The module can switch compatible 24 V DC loads in response to PLC commands. Typical examples include interface relay coils, status indicators, and other DC devices whose electrical characteristics fall within the documented limits.
For equipment with higher current requirements or demanding inductive characteristics, an appropriately rated interface device may be needed.
4.3 Coordinating Machine Sequences
In automated machinery, outputs are activated according to operating states and feedback from sensors. The TM3DQ16RG provides the electrical switching channels required to implement these commands.
For example, the PLC may activate an output after receiving a product-position signal and completing the relevant interlock checks. The module then switches the connected control circuit.
4.4 Supporting Modular System Design
The TM3DQ16RG integrates into supported Modicon TM3 configurations. A modular arrangement allows engineers to select output capacity according to the needs of the application and expand the system when additional channels are required.
All expansion modules must be compatible with the controller and installed within the documented system limits.
4.5 Maintenance and Diagnostics
The output status indicators help maintenance personnel compare commanded states with channel indications. When combined with PLC diagnostics and electrical measurements, this information can help distinguish a program issue from a wiring or field-device problem.
The indicators are diagnostic aids, not a substitute for appropriate electrical testing or safety procedures.
5. Industrial Applications
5.1 Packaging Machinery
Packaging equipment often requires many discrete output signals for indicators, interface relays, pneumatic control interfaces, and auxiliary devices. The TM3DQ16RG can provide output channels for compatible 24 V DC control circuits.
The PLC program coordinates the outputs according to product detection, machine timing, and operating conditions.
5.2 Conveyor and Material Handling Systems
Conveyor systems use output commands to operate compatible signal indicators, control relays, and other DC devices associated with transfer stations and sorting equipment.
The module’s 16 channels can support a group of discrete control functions within a properly designed PLC system. Motor power switching should be handled by appropriately rated contactors or drive equipment rather than by assuming that a transistor output can power a motor directly.
5.3 Automated Assembly Equipment
Assembly machines often contain fixtures, clamps, positioning mechanisms, and auxiliary control devices. The TM3DQ16RG can switch compatible DC control circuits as part of a programmed production sequence.
The module provides standard output switching; safety-related functions require suitable safety-rated components and an appropriate safety architecture.
5.4 Industrial Test Systems
Automated test equipment may use output channels to activate indicators, interface relays, and compatible DC control devices. The PLC can coordinate these outputs with test status, operator commands, and measurement results.
The module is appropriate where discrete switching is required rather than analog output generation or specialized high-speed pulse control.
5.5 Water Treatment and Utility Equipment
Utility systems may require digital output commands for alarm indicators, auxiliary relays, and compatible DC control devices. The TM3DQ16RG can provide these outputs within the specified electrical limits.
Where pumps, motors, or other high-power equipment are involved, the output should operate an appropriate control interface rather than directly switching loads beyond its rating.
5.6 Industrial Inspection Stations
Inspection systems can use discrete outputs to signal test status, activate compatible indicators, or trigger external control circuits. The TM3DQ16RG provides multiple output channels for these functions when integrated into a supported PLC architecture.
6. Installation and System Integration
Correct wiring, output-load selection, and controller configuration are essential for reliable operation.
6.1 Verify Controller Compatibility
The TM3DQ16RG belongs to the Modicon TM3 expansion range. Confirm the supported controller model, firmware, engineering-software version, and expansion configuration before installation.
Although the TM3 platform is used with compatible M221, M241, M251, and M262 controller systems, exact compatibility should be verified for the specific hardware and software versions.
6.2 Mounting and Environmental Protection
Install the module using the specified DIN-rail or panel-mounting arrangement. Leave sufficient space for terminal access, cable routing, and maintenance.
The module has an IP20 rating and should be installed inside an enclosure that provides appropriate environmental protection. Ensure that the operating conditions remain within the specified temperature, humidity, and vibration limits.
6.3 Power Supply and Common Connections
Use the specified 24 V DC supply arrangement and follow the official terminal wiring diagram. Confirm the polarity of the supply and output circuits before energizing the system.
The power supply must be sized for the entire installation, including the controller, expansion modules, field devices, and any interface components. Check the module’s group-current and total-current limits before connecting multiple loads.
6.4 Output Wiring
The TM3DQ16RG uses removable spring-clamp terminals. Use conductors of the permitted type and cross-section, and prepare them according to the terminal requirements.
Connect only compatible DC loads and observe the positive-logic output arrangement. Keep output wiring away from high-interference conductors where practical, particularly in installations containing motors, drives, or switching power equipment.
6.5 Load and Protection Selection
Before connecting a load, verify its rated voltage, steady-state current, inrush current, and electrical characteristics. The permissible current may depend on channel grouping, ambient temperature, and the number of simultaneously activated outputs.
Inductive loads such as relay coils and solenoids can generate voltage transients when switched. Use appropriate external suppression compatible with the load and output circuit. Do not assume that the module provides every required form of load or short-circuit protection.
6.6 PLC Programming and Channel Assignment
Use the supported Schneider Electric engineering environment to configure the controller and assign the module’s output channels to PLC variables.
Develop the application program so that outputs respond to the correct inputs, operating states, and interlocks. Consider startup conditions, loss of controller power, communication faults, and recovery behavior where relevant to the application.
6.7 Commissioning and Troubleshooting
Before commissioning the equipment, complete the following checks:
- Confirm the model number and terminal assignments.
- Verify the 24 V DC supply and polarity.
- Check the source-type output wiring and common connections.
- Confirm that every load is compatible with the output ratings.
- Verify total current and group-current limits.
- Check external protection and inductive-load suppression.
- Test each channel using a controlled procedure.
- Compare PLC output commands with the channel indicators.
- Confirm that connected devices operate as expected.
- Record the final wiring, channel mapping, and configuration.
If an output does not operate correctly, inspect the supply, wiring, load, output command, and external protection before concluding that the module has failed.
7. Compatible System Components
The TM3DQ16RG can be integrated into supported Modicon control systems with compatible hardware and software.
| Component | Function |
|---|---|
| Modicon M221 Logic Controller | Executes PLC logic and manages supported I/O expansion |
| Modicon M241 Logic Controller | Provides machine-control functions for compatible configurations |
| Modicon M251 Logic Controller | Supports compatible PLC and expansion arrangements |
| Modicon M262 Logic Controller | Provides control and communication functions in supported systems |
| TM3 Digital Input Modules | Acquire discrete signals from sensors and switches |
| TM3 Relay Output Modules | Switch compatible circuits through relay contacts |
| TM3 Analog Input Modules | Measure compatible analog field signals |
| TM3 Analog Output Modules | Generate compatible analog reference signals |
| 24 V DC Power Supply | Supplies the control system and compatible DC circuits |
| Interface Relays | Provide an additional switching interface when required |
| Contactors | Switch suitably rated power circuits under PLC control |
| Sensors and Limit Switches | Provide field feedback to the controller |
| External Protective Devices | Protect the field wiring and loads according to circuit requirements |
The suitability of each component depends on the controller model, expansion limits, wiring design, output load, and environmental conditions.
8. Recommended Alternative Models
The following modules may be considered when selecting a different output arrangement within the Modicon TM3 range. They should not be assumed to be direct drop-in replacements without checking their specifications.
| Model | Product Type | Main Difference |
|---|---|---|
| Schneider TM3DQ16R | Discrete output module | Relay-output version; different switching characteristics |
| Schneider TM3DQ16T | Discrete output module | Transistor-output variant; verify output logic and terminal style |
| Schneider TM3DQ16TG | Discrete output module | Transistor-output variant with a different terminal configuration |
| Schneider TM3DQ8R | Discrete output module | Fewer output channels with relay switching |
| Schneider TM3DQ8T | Discrete output module | Fewer transistor output channels |
| Schneider TM3DM32R | Mixed digital I/O module | Combines digital inputs and relay outputs |
| Schneider TM3DM24R | Mixed digital I/O module | Combines digital inputs with relay outputs and provides a different channel arrangement |
Selection note: Confirm the exact product code and official technical specifications before ordering an alternative. Pay particular attention to source/sink logic, transistor output type, current limits, terminal style, output protection, and controller compatibility.
9. Key Advantages
16 Discrete Output Channels
The TM3DQ16RG provides 16 digital outputs, allowing a compatible PLC to control multiple DC field circuits from one expansion module.
Electronic Switching
Transistor outputs use solid-state switching rather than mechanical relay contacts. This makes them suitable for compatible DC applications requiring frequent output changes.
Spring-Clamp Terminals
Removable spring-clamp terminals support field wiring and can simplify installation and maintenance when conductors are prepared and installed correctly.
Individual Output Indicators
Channel LEDs provide a convenient visual reference during commissioning and fault diagnosis.
Modular PLC Expansion
The module extends supported Modicon TM3 control systems, allowing output capacity to be matched to machine requirements without automatically replacing the main controller.
Flexible Industrial Integration
The combination of multiple discrete outputs and a compact module format makes the TM3DQ16RG suitable for a wide range of machine-control applications that use compatible 24 V DC loads.
10. Technical FAQs
Q1: What is the Schneider TM3DQ16RG?
The TM3DQ16RG is a discrete output expansion module in the Schneider Electric Modicon TM3 series. It provides 16 transistor output channels for compatible industrial control applications.
Q2: How many output channels does it have?
The module provides 16 discrete output channels.
Q3: What type of output does the TM3DQ16RG use?
It uses transistor outputs with positive-logic, source-type operation. Confirm the wiring arrangement and electrical limits against the official product documentation.
Q4: Can it switch AC loads?
Do not assume that the transistor outputs can switch AC loads. The TM3DQ16RG is intended for compatible DC output circuits, and the connected load must match the module’s electrical specifications.
Q5: Can it directly drive a motor?
A transistor output should not be assumed to drive a motor directly. Motor starting current and inductive switching requirements generally call for appropriately rated drive or contactor equipment.
Q6: What terminal type does it use?
The TM3DQ16RG uses removable spring-clamp terminal blocks.
Q7: Which PLC controllers can use this module?
It is designed for compatible Modicon TM3 expansion configurations. Confirm the specific controller model, firmware, and expansion limits before installation.
Q8: What are the dimensions and weight?
The supplied product information lists dimensions of 90 × 84.6 × 27.4 mm and a weight of 0.145 kg. Verify the dimensional orientation against the mechanical drawing before cabinet design.
Q9: How can an output fault be diagnosed?
Check the PLC command, 24 V DC supply, output polarity, common connections, load current, wiring continuity, and any external protection or suppression components. Compare the physical output behavior with the module’s channel indicators.
Q10: Does the module include built-in protection for every load fault?
Do not assume that all load faults are protected internally. Select external protection and suppression according to the load, wiring, and applicable installation requirements.
Q11: Is the TM3DQ16RG a mixed input/output module?
No. It is a discrete output module. A separate compatible input module is required when additional digital input channels are needed.
Q12: What should be considered when replacing it?
Compare the output technology, logic type, number of channels, terminal arrangement, electrical ratings, controller compatibility, and physical dimensions. A module with the same number of outputs may still differ in important electrical characteristics.
11. Conclusion
The Schneider Electric TM3DQ16RG is a 16-channel discrete output expansion module designed for compatible Modicon TM3 automation systems. Its transistor output architecture and removable spring-clamp terminals make it a candidate for industrial applications requiring multiple electronically switched DC control signals.
The module can support packaging machinery, conveyor systems, automated assembly equipment, and other PLC-controlled applications where its output characteristics match the connected field devices. Proper system design requires verification of output logic, load current, common connections, external protection, and controller compatibility.
Before purchasing or commissioning the TM3DQ16RG, confirm the exact product code, output ratings, dimensions, weight, and wiring requirements against the applicable Schneider Electric technical documentation. Correct specification and installation help ensure reliable integration into the wider control system.