TM3DI8 Schneider Electric Digital Input Module
The TM3DI8 is a Modicon TM3 digital input module from Schneider Electric. It offers 8 channels at 24 Vdc. Moreover, each channel supports sink or source wiring. It meets Type 1 per IEC 61131-2. In addition, input current is 7 mA per channel at 24 Vdc. It uses a removable screw terminal block at 5.08 mm pitch. Also, it runs on 24 Vdc via the TM3 bus. It fits compact cabinets at IP20. Therefore, this module suits fast machine signal capture in factory automation.
Technical Data
| Brand | Schneider Electric |
| Model | TM3DI8 |
| Series | Modicon TM3 |
| Module Type | Digital Input Module |
| Channels | 8 |
| Signal Type | 24 Vdc, sink/source, Type 1 per IEC 61131-2 |
| Input Range | 19.2-28.8 Vdc (24 Vdc nominal) |
| Input Current | 7 mA per channel at 24 Vdc |
| Isolation | 500 V AC between input and internal logic |
| Response Time | 4 ms max turn on/off |
| Wiring | Removable screw terminal block, 5.08 mm pitch |
| Supply Voltage | 24 Vdc via TM3 bus |
| Bus Current | 22 mA at 5 V DC (all inputs off) |
| Operating Temperature | 0 to +55 °C |
| Storage Temperature | -25 to +70 °C |
| Protection Rating | IP20 |
| Dimensions (H×W×D) | 90 × 27.4 × 84.6 mm |
| Weight | 0.085 kg |
| Compatible Platforms | Modicon M221, M241, M251, M262 |
| Lifecycle Status | Active (Last verified: 2026-09) |
Key Specifications
- Measurement Range: 19.2-28.8 Vdc
- Frequency Response: 4 ms max turn on/off
- Sensitivity: 7 mA per channel at 24 Vdc
- Linearity: Not applicable for digital input
- Resolution: Not applicable for digital input
- Temperature Range: 0 to +55 °C operating, -25 to +70 °C storage
- Environmental Tolerance: IP20, non-condensing industrial use
- Anti-interference Ability: 500 V AC isolation between input and logic
Suitable Equipment
- Modicon M221 PLC panels
- Modicon M241 machine controllers
- Modicon M251 distributed systems
- Modicon M262 edge controllers
- Compact IP20 control cabinets
- Legacy TM3 expansion racks
Oiltech Controls Review
- The TM3DI8 is a solid pick for 24 Vdc signal capture.
- Its 8 channels fit dense machine panels.
- Also, its sink or source wiring adds layout freedom.
- Its screw terminal block speeds field wiring.
- Moreover, its 4 ms response suits most machine logic.
- Its 22 mA bus draw keeps power budget low.
Oiltech Controls Insight
- Check your PLC series before you buy.
- Confirm panel width for the 27.4 mm body.
- Also, match sink or source wiring to your sensor type.
- Verify 24 Vdc supply tolerance at the cabinet.
- In addition, keep spares in a dry, cool store.
- Ask for photos and test data before shipment.
Diagnostic Capability
- Module status indicator
- Bus status indicator
- Fast fault check through PLC software
- Clear channel mapping for wiring checks
- Simple terminal block removal for meter tests
- Good for sensor and switch fault tracing
Installation Guide
- Mount on the TM3 bus rail in a dry cabinet.
- Keep ambient temperature between 0 and +55 °C.
- Use 24 Vdc supply through the TM3 bus.
- Wire sensors to the removable screw terminal block.
- Set sink or source mode to match your sensors.
- Maintain IP20 protection with a closed panel.
Compatibility Notes
- Works with Modicon M221
- Works with Modicon M241
- Also works with Modicon M251
- Works with Modicon M262
- Fits Modicon TM3 expansion platform
- Check PLC firmware before order
Certifications and Packaging
- Schneider Electric brand quality
- Active lifecycle status verified 2026-09
- Package includes 1 x TM3DI8 digital input module
- Basic protective packing included
- Cables and manuals not included unless stated
- Ask for compliance documents before order
Warranty and Shipping
- Every order includes a 12-month warranty
- We ship by FedEx, UPS, and DHL
- Global shipment support available
- Technical verification before shipment
- Orders ship in 24-28 hours after payment
- Contact us for bulk lead time
Why Buy From Oiltech Controls?
- More than 15 years in industrial automation spare parts
- Worldwide shipping by FedEx, UPS, and DHL
- Tested industrial surplus and refurbished options
- 12-month warranty on every order
- Technical verification before shipment
- Support for obsolete control systems
FAQ
Q: How do I choose between sink and source wiring for TM3DI8?
A: Match the module mode to your sensor output type. Sink sensors pull the input low. Source sensors drive the input high. Check your sensor datasheet first.
Q: Can I use TM3DI8 with an M221 PLC?
A: Yes. It works with Modicon M221, M241, M251, and M262. Confirm firmware version and bus power budget before you order.
Q: What is the real response time in a machine cycle?
A: The module spec is 4 ms max turn on/off. Add PLC scan time for total response. For most machine logic, this is fast enough.
Q: How do I test a channel that does not turn on?
A: Check 24 Vdc at the terminal first. Then swap the sensor to a known good channel. Also check the module and bus status LEDs.
Q: How fast can you ship, and how do I confirm stock?
A: We ship in 24-28 hours after payment. Email info@oiltechcontrols.com or WhatsApp +86 158 8020 0923 to confirm stock.
Contact Information
Inquiries: info@oiltechcontrols.com
Phone / WhatsApp: +86 158 8020 0923
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