TM251MESC Logic Controller – Modicon M251
Compact, Ethernet & CANopen‑capable PLC for machine control. Powered by 24 V DC. Memory: 64 MB RAM + 128 MB flash. Supports 7 local / 14 remote I/O expansions. Integrated dual‑port Ethernet, USB, serial link, and CANopen J1939.
Technical Specifications
| Brand | Schneider Electric |
| Model | TM251MESC |
| Series | Modicon M251 |
| Rated Supply | 24 V DC (20.4…28.8 V) |
| Memory | 64 MB RAM + 128 MB flash backup |
| Data Storage | ≤16 GB SD card (optional) |
| Execution Time | 0.3 ms / 1K instr. (event/periodic); 0.7 ms (other) |
| Max I/O | 7 local + 14 remote |
| Communication | Ethernet (2‑port), USB mini‑B, RS232/RS485, CANopen |
| Protocols | Modbus TCP, Ethernet/IP, OPC UA, FTP, SNMP, SQL, Web server |
| CANopen | DS 301 V4.02, up to 63 devices |
| RTC Drift | ≤60 s/month at 25 °C |
| Operating Temp | ‑10…55 °C (horizontal), ‑10…35 °C (vertical) |
| Storage Temp | ‑25…70 °C |
| Relative Humidity | 10…95 % non‑condensing |
| Vibration / Shock | 3 gn / 15 gn (11 ms) |
| Immunity (ESD / EFT) | 8 kV air / 4 kV contact; 2 kV (power lines) |
| Protection | IP20 (cover on), pollution degree 2 |
| Mounting | DIN rail (TH35‑15/7.5) or panel (kit) |
| Dimensions (H x W x D) | 90 x 54 x 95 mm |
| Weight | 0.22 kg |
Installation & Compatibility
- Mount on DIN rail (TH35‑15 or TH35‑7.5) or panel with fixing kit.
- Removable screw terminal block (pitch 5.08 mm) for power.
- Supports Modbus, Ethernet/IP, CANopen and OPC UA.
- Works with SoMachine‑Network and WebVisu.
- Optional SD card up to 16 GB for data logging.
- Lithium battery (BR2032) retains RTC and programs for 2 years.
Diagnostics & Environmental Resilience
- On‑board LEDs: PWR, RUN, ERR, I/O, SD, BAT, Ethernet activity, CANopen status.
- Web server provides remote monitoring and diagnostics.
- Surge withstand: 1 kV (shielded cable), 0.5 kV differential.
- Conducted / radiated emissions meet Class A limits (IEC 55011).
- Operates at altitudes up to 2000 m (storage to 3000 m).
- Marine certifications: LR, ABS, DNV‑GL.
Certifications & Standards
- cULus, CE, UKCA, DNV‑GL, ABS, LR.
- IEC 61131‑2:2007, UL 508, CSA C22.2 No 142 / 213.
- ANSI/ISA 12‑12‑01 (hazardous locations).
Typical Applications
- Packaging machines, conveyors, and material handling.
- HVAC systems, pump stations, and water treatment.
- CNC and robotic cell control via CANopen.
- Remote I/O networks with Modbus TCP or Ethernet/IP.
FAQ – Quick Answers
- Q: Can I use this with old Quantum systems?
A: Yes, via Modbus TCP or serial links. Modicon Quantum series compatible. - Q: What software is required?
A: SoMachine or EcoStruxure Machine Expert. - Q: How many CANopen nodes?
A: Up to 63 slave devices. - Q: Battery life?
A: 4 years (BR2032), backup time 2 years at 25 °C. - Q: Shipping methods?
A: FedEx, UPS, DHL available.
Package Contents
- TM251MESC logic controller (unit)
- Power supply connector (removable screw terminal)
- DIN rail mounting clips
- Quick start guide (digital download)
- Warranty card (12 months)
Why Buy From Oiltech Controls?
- 15+ years in industrial automation spares.
- Global shipment – FedEx, UPS, DHL.
- Refurbished / surplus options with full testing.
- 12‑month warranty on all products.
- Technical verification before dispatch.
- Support for obsolete control systems.
Contact us: info@oiltechcontrols.com |
+86 158 8020 0923 (WhatsApp)
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