Is Your Motion Control Network Holding Back Your Production Line?
If your SERCOS III network is sluggish or unreliable, the Schneider Electric TM5NS31 interface module offers a direct replacement path. This module belongs to the Modicon TM5 range and provides a dedicated SERCOS III communication interface for Modicon LMC078 motion controllers. It integrates seamlessly into existing TM5 systems, minimizing downtime and restoring deterministic communication.
What Is the TM5NS31?
The TM5NS31 is a SERCOS III field bus interface module from Schneider Electric. It acts as the communication bridge between a Modicon LMC078 motion controller and SERCOS III devices. The module features two RJ45 connectors for SERCOS III and supports Ethernet/IP, operating at 100 Mbit/s. Its compact white housing and lightweight design (0.03 kg) make it ideal for space-constrained control cabinets.
Key Technical Specifications
| Specification | Value |
|---|---|
| Product or component type | Sercos III communication module |
| Range of product | Modicon TM5 |
| Range compatibility | Modicon LMC078 |
| Integrated connection type | Ethernet/IP, 2 RJ45 connectors Sercos (RJ45), 100 Mbit/s |
| Current consumption | 5 V DC base |
| Power dissipation | 1.75 W |
| Local signalling | 1 LED green/red for STAT; 1 LED green/red for Sercos III; 1 LED green for Sercos III port 1; 1 LED green for Sercos III port 2 |
| Colour | White |
| Product weight | 0.03 kg |
| Resistance to electrostatic discharge | 4 kV on contact, 8 kV in air (EN/IEC 61000-4-2) |
| Resistance to electromagnetic fields | 1 V/m (2…2.7 GHz), 10 V/m (80 MHz…2 GHz) (EN/IEC 61000-4-3) |
| Resistance to fast transients | 1 kV I/O, 1 kV shielded cable, 2 kV power lines (EN/IEC 61000-4-4) |
| Surge withstand | 0.5 kV differential mode, 1 kV common mode (EN/IEC 61000-4-5) |
| Electromagnetic compatibility | EN/IEC 61000-4-6 |
| Disturbance radiated/conducted | CISPR 11 |
| Sustainable offer status | Green Premium product |
Why the TM5NS31 Belongs in Your Upgrade Plan
Legacy motion systems often suffer from communication bottlenecks. The TM5NS31 addresses this by providing a reliable SERCOS III interface with robust noise immunity. Its compliance with EN/IEC 61000-4-2, -4-3, -4-4, and -4-5 ensures stable operation in electrically noisy industrial environments. For plants running Modicon LMC078 controllers, this module is a cost-effective alternative to replacing the entire control system.
Real-World Applications
Packaging Machinery – High-speed packaging lines rely on precise synchronization. The TM5NS31 delivers deterministic SERCOS III communication, reducing jitter and improving product quality.
CNC and Motion Control – In metal cutting or woodworking, the module ensures real-time feedback between the controller and drives, minimizing scrap and maximizing throughput.
Material Handling – Conveyor systems with multiple axes benefit from the module’s dual RJ45 ports, enabling daisy-chain topologies that simplify wiring and reduce installation costs.
Installation and Setup
The TM5NS31 snaps into a TM5 bus base (ordered separately). You will also need a power supply and terminal block (both ordered separately). Connect your SERCOS III devices to the two RJ45 ports. The integrated LEDs provide immediate status feedback: STAT, Sercos III, and port-specific indicators. For optimal performance, use shielded cables and follow Schneider Electric’s installation guidelines.
Maintenance and Reliability
With no moving parts, the TM5NS31 is virtually maintenance-free. Periodically inspect connections and verify LED status. The module’s wide electromagnetic compatibility and surge protection make it suitable for harsh environments. Its low power dissipation (1.75 W) reduces heat buildup, extending component life.
Compatibility and Integration
The TM5NS31 works exclusively with Modicon LMC078 motion controllers. It supports Ethernet/IP and SERCOS III protocols. If you are upgrading from an older module, verify that your controller firmware supports SERCOS III. The module’s Green Premium status reflects Schneider Electric’s commitment to sustainability.
Selection Guide
Before purchasing, confirm your controller model (LMC078) and network protocol (SERCOS III). You will need a TM5 bus base, power supply, and terminal block. SpareTechPLC stocks genuine Schneider Electric modules and can help you select the right accessories. Contact us for availability and bulk pricing.
Frequently Asked Questions
Q: Can I use the TM5NS31 with any Modicon controller?
A: No, it is specifically designed for the Modicon LMC078 motion controller.
Q: What is the power consumption of the TM5NS31?
A: It draws 5 V DC from the base and dissipates 1.75 W.
Q: Does the module support Ethernet/IP?
A: Yes, the integrated connection type includes Ethernet/IP and SERCOS III via two RJ45 connectors.
Q: What LEDs are available for diagnostics?
A: There are four LEDs: STAT (green/red), Sercos III (green/red), and two port LEDs (green).
Q: Is the TM5NS31 still available?
A: Please verify current lifecycle status and availability with SpareTechPLC before ordering.
