Introduction
The Schneider TM3DM24R Discrete I/O Module is a versatile expansion unit within the Modicon TM3 I/O family, engineered to deliver reliable digital input/output handling in compact automation systems. Combining discrete inputs and relay outputs in a single module, it provides a flexible interface for reading field signals and controlling actuators, solenoids, lamps, and other devices up to 240 V AC/DC.
Designed for industrial automation, machine control, and OEM applications, the TM3DM24R is ideal where both sensing and actuation are required in a single, space‑efficient package. Its robust construction, fast response, and seamless integration with TM3 logic controllers make it a practical choice for distributed I/O architectures.
Technical Specifications
| Specification | Details |
|---|
| Model Number | TM3DM24R |
| Module Type | Discrete I/O Expansion Module |
| Compatible Controllers | Modicon TM3 Logic Controllers |
| Digital Inputs | 8 channels |
| Digital Outputs | 8 relay outputs |
| Input Voltage | 24 V DC |
| Output Type | Relay switching – SPST (Form A) |
| Output Voltage | Up to 240 V AC/DC |
| Output Current | Up to 2 A per relay |
| Input Type | Sinking or sourcing |
| Response Time | ≤ 5 ms |
| Connection | Removable screw or spring‑clamp terminals |
| Mounting | DIN‑rail or symmetrical rail mount |
| Protection Rating | IP20 |
| Operating Temperature | 0 °C to 60 °C |
| Storage Temperature | −25 °C to 70 °C |
| Relative Humidity | 5 %–95 % non‑condensing |
| Dimensions | Approx. 90 mm × 23.5 mm × 70 mm |
| Weight | ~95 g |
Applications
The TM3DM24R module is suited for automation scenarios where both digital inputs and relay outputs are essential:
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Machine status monitoring and discrete control
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Actuator, solenoid, and lamp control in OEM panels
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Conveyor control logic with integrated outputs
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Sequential process automation with feedback and actuation
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Building automation on/off controls
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Small‑to‑medium control panels needing mixed I/O
Its dual I/O nature reduces the number of modules required in an I/O rack and simplifies wiring effort.
Advantages
Integrated Discrete I/O
Combines 8 inputs and 8 relay outputs in one module — ideal for mixed signal interfacing.
Relay Output Versatility
Outputs can switch AC or DC loads up to 240 V and 2 A, supporting a wide variety of devices.
Fast Response & Reliability
Inputs and outputs respond within milliseconds, ensuring dependable logic execution.
Industrial‑Ready Design
Built for automation environments with broad temperature and humidity tolerance.
Ease of Installation
Removable terminal blocks and standard DIN‑rail mounting streamline panel assembly and service.
Technical FAQs
1. What types of signals does the TM3DM24R handle?
It captures 8 discrete inputs and provides 8 relay output channels capable of switching AC/DC loads.
2. What voltage is required for the inputs?
Discrete inputs operate at 24 V DC.
3. What types of output devices can be controlled?
Relay outputs can switch solenoids, motors (small), lamps, contactors, and other AC/DC devices up to 240 V at 2 A.
4. What is the maximum output current per relay?
Each relay output can handle up to 2 A.
5. What is the module’s response time?
Discrete input and output transitions are processed within approximately 5 ms.
6. How are field wires connected?
Field wiring is achieved through removable screw or spring‑clamp terminals.
7. Can it operate in harsh industrial environments?
Yes, the module is designed for industrial conditions with IP20 protection and broad tolerance ranges.
8. Is the module compatible with both sinking and sourcing inputs?
Yes — it supports both sinking and sourcing digital input configurations.
9. What mounting options are available?
Standard DIN‑rail or symmetrical rail panel mounting.
10. Is it compatible with other TM3 I/O modules?
Yes, it integrates seamlessly with other TM3 discrete, analog, mixed, and specialty modules.
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