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- Schneider
- TM3DM24RG
- Discrete I/O Module
- France
- 90 × 84.6 × 42.9 mm
- 0.27 kg
- Xiamen, China
- New & In Stock
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Product Overview
The Schneider TM3DM24RG is a mixed discrete I/O module in the Modicon TM3 family, combining 16 discrete inputs with 8 relay outputs. It fits machines where a controller needs to monitor a relatively large number of ON/OFF field signals while also switching several relay-controlled devices.
A typical example is a packaging or assembly machine with multiple proximity sensors, limit switches, push buttons, and actuator feedback points. The 16 inputs can collect these machine states, while the 8 relay outputs can operate suitable solenoid valves, contactors, indicator devices, or interposing relays. Having both input and relay output functions on the same module can simplify the I/O arrangement for this type of machine.
The TM3DM24RG is also useful in retrofit projects where additional digital I/O is needed without changing the main controller. The existing Modicon controller, TM3 expansion configuration, field wiring, and output load requirements should be checked before replacement or expansion work.
The module belongs to the modular Modicon TM3 architecture, allowing discrete I/O to be added according to the actual signal requirements of the machine. Its spring-terminal connection is particularly useful in control cabinets where quick and secure field wiring is preferred.
Technical Specifications
| ParameterSpecification | |
|---|---|
| Manufacturer | Schneider Electric |
| Model | TM3DM24RG |
| Product Family | Modicon TM3 |
| Product Type | Discrete I/O Module |
| Total I/O | 24 |
| Number of Inputs | 16 |
| Input Type | Discrete, 24 V DC |
| Number of Outputs | 8 |
| Output Type | Relay |
| Connection Type | Removable spring terminal block |
| Input Turn-On Time | 4 ms |
| Input Turn-Off Time | 4 ms |
| Output Turn-On Time | Max. 10 ms |
| Output Turn-Off Time | Max. 10 ms |
| Protection Degree | IP20 |
| Compatible Controllers | Modicon M221 / M241 / M251 / M262 |
| Dimensions | 90 × 84.6 × 42.9 mm |
| Weight | 0.27 kg |
Product Features
- Modicon TM3 mixed discrete I/O module
- 24 total I/O channels
- 16 discrete input channels
- 8 relay output channels
- 24 V DC discrete input signals
- Relay-based switching for discrete loads
- Removable spring terminal connection
- Suitable for Modicon M221, M241, M251, and M262 controller systems
- Combines digital signal acquisition and relay output functions
- Suitable for machine automation and equipment control
- Useful for applications with a higher number of input signals and several relay outputs
Working Principle
The TM3DM24RG handles field inputs and relay outputs within the same TM3 expansion module.
Field Sensors / Switches → 16 Discrete Inputs → Modicon Controller → 8 Relay Outputs → Actuators
The 16 input channels receive ON/OFF signals from field devices such as proximity sensors, limit switches, push buttons, and auxiliary contacts. The connected Modicon controller reads these states and applies the machine’s programmed sequence or interlock logic.
When the control program calls for a discrete output, one of the eight relay channels switches its contact according to the commanded state. A relay output can, for example, energize a solenoid valve or contactor coil when a machine-position input confirms that the previous operation has completed.
This arrangement is useful when a machine has many feedback signals but does not require a separate output module for every actuator. The controller remains responsible for the control logic, while the TM3DM24RG provides the field-level input and relay switching interface.
Role in a Modicon TM3 Control Architecture
The TM3DM24RG combines discrete signal acquisition and relay output switching in one expansion position.
Field Sensors / Switches → TM3DM24RG Inputs → Modicon Controller → TM3DM24RG Relay Outputs → Machine Actuators
| System ElementFunction | |
|---|---|
| TM3DM24RG Inputs | Collect 16 discrete field signals |
| TM3DM24RG Relay Outputs | Switch 8 discrete output circuits |
| Proximity Sensors | Detect machine position or product presence |
| Limit Switches | Provide end-of-travel feedback |
| Push Buttons / Selectors | Provide operator commands |
| Modicon Controller | Processes input states and executes logic |
| Relay Output Circuit | Switches suitable external loads |
| Solenoid Valve | Provides discrete pneumatic or hydraulic actuation |
| Contactor / Interposing Relay | Interfaces with suitable external circuits |
The actual channel assignment depends on the machine design and controller program. Input and output allocation should be documented during commissioning so later troubleshooting can be performed without tracing the entire field wiring.
Industrial Applications
| ApplicationTypical Use | |
|---|---|
| Packaging Machinery | Product detection, position feedback, and solenoid control |
| Assembly Equipment | Part detection and actuator sequencing |
| Conveyor Systems | Sensor feedback and discrete motor or actuator commands |
| Material Handling | Equipment status monitoring and relay-controlled devices |
| Machine Tools | Limit detection, operator commands, and auxiliary control |
| Pump Skids | Run/fault feedback and discrete auxiliary control |
| Automated Production Lines | Machine-state acquisition and actuator switching |
| Motor Control Panels | Auxiliary contacts, interlocks, and relay control |
| Process Equipment | Switch monitoring and discrete valve operation |
| Equipment Retrofit Projects | Additional mixed I/O without replacing the main controller |
Installation and Maintenance
- Confirm that the TM3DM24RG is supported by the installed Modicon controller and TM3 expansion configuration.
- Verify that the required I/O allocation matches the module’s 16-input and 8-relay-output arrangement.
- Check the signal requirements of every connected input device before wiring.
- Confirm the voltage, current, and load characteristics of each relay output circuit.
- Check the output common loading when multiple relay channels are used simultaneously.
- Use the removable spring terminal blocks according to the applicable wiring arrangement.
- Keep field signal wiring appropriately separated from high-power motor and drive wiring where practical.
- Label each input and output according to the machine electrical drawings.
- During commissioning, activate each field sensor and confirm the corresponding input status in the controller.
- Test each relay output with its intended load and verify that the actuator responds to the programmed command.
- If an input or output does not respond correctly, check the field device, wiring, controller configuration, and load circuit before replacing the module.
- During scheduled maintenance, inspect terminal connections and relay-controlled circuits for loose wiring, abnormal heating, contact wear, or unexpected switching behavior.
Related Components
| ComponentFunction | |
|---|---|
| Modicon M221 Controller | Compact controller for TM3 expansion |
| Modicon M241 Controller | Machine controller with TM3 I/O expansion |
| Modicon M251 Controller | Controller for modular machine I/O |
| Modicon M262 Controller | Logic and motion controller with TM3 I/O |
| Proximity Sensor | Provides discrete position or presence signals |
| Limit Switch | Provides mechanical position feedback |
| Push Button | Provides operator command input |
| Solenoid Valve | Discrete actuator controlled through relay output |
| Contactor | Switches suitable motor or power circuits |
| Interposing Relay | Provides an interface between control and field circuits |
| TM3 Digital I/O Modules | Adds further discrete I/O capacity |
Recommended Related Models
| Model / Product FamilyProduct Type | Typical Application |
|---|---|
| Schneider TM3DM24R | Mixed I/O applications using screw terminal connections |
| Schneider TM3DM16R | Smaller mixed I/O applications with relay outputs |
| Schneider TM3DM32R | Higher-density mixed discrete I/O applications |
| Schneider TM3DI16 | Applications requiring additional digital inputs only |
| Schneider TM3DQ8T | Applications requiring transistor digital outputs |
| Schneider Modicon M241 | Machine controller for TM3-based I/O systems |
| Schneider Modicon M262 | Advanced machine control with TM3 expansion |
Key Advantages
- 24 discrete I/O channels in one module.
- 16 digital inputs for field status and sensor signals.
- 8 relay outputs for discrete load switching.
- Spring-terminal connection for field wiring.
- Suitable for machines with mixed input and relay output requirements.
- Integrates with the modular Modicon TM3 architecture.
- Supports several Modicon controller families.
Technical FAQs
What is the I/O configuration of the TM3DM24RG?
The TM3DM24RG combines 16 discrete inputs and 8 relay outputs, giving the module 24 I/O channels in total. This arrangement suits machines that require more input points than relay-controlled outputs.
What is the purpose of the “G” version in TM3DM24RG?
The TM3DM24RG uses a spring terminal connection, which distinguishes it from the TM3DM24R version that uses screw terminal connections. This difference should be considered when replacing a module in an existing control cabinet.
Can the relay outputs directly control a motor?
The relay outputs are intended for suitable discrete loads and control circuits. For motor applications, the relay output would normally operate an appropriate contactor or interface device rather than switch the motor power directly. The actual load must remain within the applicable relay ratings.
What should be checked when replacing a TM3DM24RG?
Check the existing Modicon controller compatibility, I/O channel assignment, field wiring, terminal type, input signal requirements, and relay output loads. For an existing installation, the spring-terminal connection is also important because replacing it with a screw-terminal variant may require changes to the field wiring arrangement.