In most procurement cycles, NX-SIH400 is considered with Siemens PLC, Omron SMPS 24V 10A and Nx1P2 1040Dt1, giving decision-makers confidence that they’ve chosen the most dependable component.
Omron NX-SIH400 Safety Controller
The Omron NX-SIH400 Safety Controller is a safety CPU unit engineered for reliable processing of safety logic within the NX Series architecture. Built for panel-mounted installation in an open-type enclosure, it operates from 0 to 55°C with wide humidity tolerance and supports pollution degree 2 environments. With Class III SELV insulation and IEC-rated vibration and shock resistance, it is designed to withstand demanding industrial conditions. While it includes no communication connectors, it integrates seamlessly with other NX safety modules. Manufactured by Omron and categorized under Omron Safety Controller, it belongs to the NX Series.

| Brand | Omron |
| Product Type | Safety Controller |
| Model Number | NX-SIH400 |
Omron NX-SIH400 Safety Controller - Technical Specifications
| Specification | Value |
|---|---|
| Unit type | Safety CPU Unit |
| Enclosure | Mounted in a panel (open) |
| Ambient operating temperature | 0 to 55°C |
| Ambient operating humidity | 10% to 95% (with no condensation or icing) |
| Ambient storage temperature | −25 to 70°C (with no condensation or icing) |
| Pollution degree | 2 or less |
| Insulation class | Class III (SELV) |
| Vibration resistance | Conforms to IEC 60068-2-6. 5 to 8.4 Hz with 3.5-mm amplitude 8.4 to 150 Hz, acceleration of 9.8 m/s2 100 minutes each in X, Y, and Z directions (10 sweeps of 10 min each = 100 min total) |
| Shock resistance | Conforms to IEC 60068-2-27. 147 m/s2 , 3 times each in X, Y, and Z directions |
| Insulation resistance | 20 MΩ between isolated circuits (at 100 VDC) |
| Dielectric strength | 510 VAC for 1 min between isolated circuits, leakage current: 5 mA max |
| Installation method | DIN Track (IEC 60715 TH35-7.5/TH35-15) |
The NX-SIH400 by Omron delivers robust and compact safety processing as part of the NX series of automation components. Designed for seamless DIN Track installation (IEC 60715 TH35-7.5/TH35-15), this Safety CPU Unit is built to handle industrial conditions with ease. It operates reliably within a temperature range of 0 to 55°C and humidity up to 95%, with no risk of condensation or icing, making it suitable for enclosed cabinet setups.
The unit meets IEC 60068-2-6 standards for vibration and IEC 60068-2-27 for shock resistance, ensuring durability under mechanical stress. Electrical insulation is rated at 20 MΩ between isolated circuits with 510 VAC dielectric strength, offering enhanced protection against voltage surges. With Class III (SELV) insulation and a pollution degree of 2 or less, the NX-SIH400 upholds strict industrial safety compliance while maintaining a compact profile for optimized panel space usage.
Engineers trust the Omron NX-SIH400 for building modular, standards-compliant safety control systems that demand consistent uptime and reliability.




