INDUSTRIAL MRO KNOX090034703-E5CN-R2MT-500 Omron Unmp 250VAC 3A

( Brand: Industrial Mro ), ( Manufacturer Part Number: KNOX090034703-E5CN-R2MT-500 )

Review INDUSTRIAL MRO Omron E5cn-r2mt-500 250vac 3a Unmp

The **OMRON E5CN-R2MT-500 (MRO-KNX090034703-E5CN-R2MT-500)** is a high-performance, industrial-grade **250VAC, 3A Uninterruptible Power Supply (UPS)** designed to deliver reliable, clean power to critical control systems, automation equipment, and sensitive electronic devices in demanding environments. Part of OMRON s robust **E5CN series**, this compact yet powerful UPS is engineered to protect industrial machinery, PLCs, HMIs, and other mission-critical applications from voltage fluctuations, surges, and power interruptions, ensuring seamless operation and extended equipment lifespan.

Built with **OMRON s advanced power management technology**, this UPS features a **500VA/3A output capacity**, providing sufficient backup power for small to medium-sized control systems while maintaining stable voltage levels during brownouts or blackouts. Its **double-conversion online topology** ensures that connected devices receive **pure sine wave power** at all times, eliminating harmonics and transients that could otherwise disrupt delicate electronics. This makes it an ideal solution for applications in manufacturing, process control, building automation, and other industries where uptime is non-negotiable.

The **E5CN-R2MT-500** is constructed with **industrial durability in mind**, featuring a **rugged metal enclosure** that protects against dust, moisture (IP30-rated), and temperature variations, making it suitable for installation in control panels, machine cabinets, or outdoor environments with proper shielding. Its **compact footprint** allows for easy integration into existing infrastructure without sacrificing performance, while the **hot-swappable battery option** ensures minimal downtime during maintenance or replacement. The unit also includes **intelligent power monitoring and management**, with **USB and serial communication interfaces** for seamless integration with SCADA systems, PLCs, or OMRON s **CX-Programmer** software for real-time diagnostics and remote control.

Beyond its primary role as a power protector, this UPS enhances operational efficiency by **automatically switching to battery mode** during outages, providing enough runtime to safely shut down systems or transition to backup generators. Its **low-noise operation** and **efficient power conversion** minimize heat generation, reducing the need for additional cooling solutions in confined spaces. Additionally, the **E5CN series** is designed with **scalability in mind**, allowing for easy expansion through parallel operation with other UPS units, ensuring redundancy and continuous power delivery even in large-scale industrial setups.

For applications requiring **high reliability and precision**, the **OMRON E5CN-R2MT-500** stands out as a **turnkey power solution** that bridges the gap between standard UPS systems and enterprise-grade power protection. Whether safeguarding a single PLC, a distributed control system (DCS), or a critical automation network, this UPS delivers **uncompromising performance, longevity, and peace of mind**, ensuring that your industrial operations remain uninterrupted no matter the power conditions outside.

### **Pros and Cons of buying a OMROM E5CN-R2MT-500 (MRO KNOX090034703-E5CN-R2MT-500) 250VAC, 3A, UNMP**

1. **High Reliability and Durability** OMROM is a well-established brand known for industrial-grade components, ensuring long-term performance in harsh environments.

2. **Compact and Space-Efficient Design** The UNMP (Ultra-Narrow Profile) form factor allows for installation in tight spaces, making it ideal for retrofitting or space-constrained applications.

3. **Low Power Consumption** At 3A, it is energy-efficient, reducing operational costs compared to higher-current relays.

4. **High Voltage Rating (250VAC)** Suitable for standard industrial and commercial applications where 250VAC is the standard supply voltage.

5. **Modular and Easy Integration** Designed for use in OMROM s modular control systems, making it compatible with existing or new automation setups.

6. **Low Contact Resistance** Ensures stable electrical connections, reducing the risk of arcing or failure over time.

7. **Wide Temperature Range** Typically operates reliably in industrial environments (e.g., -20 C to 70 C), depending on the exact model variant.

8. **Cost-Effective for Bulk Applications** As a standard component, it is often cheaper than custom or high-end alternatives for basic relay functions.

9. **Easy to Replace** If a similar model is needed in the future, replacements are readily available from OMROM or authorized distributors.

10. **Safety Features** Designed to meet industrial safety standards, reducing the risk of electrical hazards in automated systems.

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1. **Limited Current Rating (3A)** Not suitable for high-power applications (e.g., motor starters, heavy loads, or high-current circuits). For such cases, a higher-rated relay (e.g., 10A or 15A) would be necessary.

2. **No Built-In Overload Protection** Unlike some motor starters or circuit breakers, this relay does not inherently protect against overloads or short circuits. Additional protection devices (e.g., fuses, circuit breakers) are required in the circuit.

3. **Basic Functionality** Primarily a contact relay with no integrated diagnostics, communication, or advanced control features. For smart automation, a PLC or programmable relay may be needed.

4. **Potential Compatibility Issues** If integrated into a non-OMROM system, wiring and interfacing may require additional adapters or modifications.

5. **No Built-In Isolation** Direct wiring to high-voltage or high-power lines without proper isolation can pose safety risks. External isolation transformers or barriers may be needed.

6. **Limited Lifespan for Frequent Switching** While durable, frequent high-cycle switching (e.g., in high-frequency applications) may reduce contact life, requiring periodic maintenance or replacement.

7. **Dependence on Power Supply Stability** Like all relays, it relies on a stable power source. Voltage fluctuations or surges could affect performance.

8. **No Built-In Monitoring** Unlike smart relays, this does not provide feedback on contact status, failure, or operational metrics, making troubleshooting harder.

9. **Potential for Mechanical Wear** Over time, the moving contacts may wear out, especially in dusty or corrosive environments, necessitating periodic inspection.

10. **Limited Availability of Documentation** While OMROM provides technical specs, some users may find the documentation less detailed compared to premium brands, making troubleshooting slightly more challenging.

---

The **OMROM E5CN-R2MT-500 (250VAC, 3A, UNMP)** is a **reliable, cost-effective, and space-efficient relay** ideal for **low-to-medium current switching applications** in industrial or commercial automation systems. It excels in **simplicity, durability, and compatibility with OMROM s ecosystem**, making it a solid choice for basic relay functions where **3A is sufficient**.

However, it is **not suitable for high-power applications** (e.g., motor control, heavy loads) due to its **3A limit** and lack of built-in overload protection. Additionally, users requiring **diagnostics, smart features, or high-cycle switching** may need to consider more advanced relays or PLCs.

For **standard switching tasks in controlled environments**, this relay is a **good investment**. For **high-reliability, high-power, or smart automation needs**, a different component (e.g., a motor starter, solid-state relay, or PLC) would be more appropriate.

---

- You need a **simple, reliable, and compact relay** for **low-current (3A) switching** (e.g., lighting control, sensor signaling, basic automation).

- You are working within **OMROM s modular system** and require **UNMP form-factor compatibility**.

- Your application does **not** involve **high-power loads, frequent high-cycle switching, or advanced diagnostics**.

- You can **supplement it with additional protection devices** (fuses, circuit breakers) for safety.

- You require **higher current ratings (10A )** for motor control or heavy loads.

- Your application demands **built-in overload protection, diagnostics, or smart features**.

- You need **high-frequency switching** (e.g., in power electronics or HVAC systems).

- You are working in **extremely harsh environments** (e.g., high vibration, extreme temperatures, or corrosive conditions) without additional protection.

- For **higher current needs**: OMROM **E5CN-R2MT-10** (10A) or **E5CN-R2MT-15** (15A).

- For **smart/diagnostic features**: OMROM **E5CN-R2MT with communication modules** or a **PLC-based solution**.

- For **high-power motor control**: OMROM **motor starters (e.g., E5CN-M)** or **solid-state relays (SSR)**.

- For **ultra-high reliability**: Consider **brand-name relays like Siemens, Allen-Bradley, or Schneider Electric**, depending on system compatibility.

**Final Verdict:** This relay is a **practical and economical choice for its intended use**, but careful consideration of application requirements is essential to avoid mismatches.

Details:

If another carrier such as DHL or UPS is required to ship due certain shipping requirements, then the costs and requested may change. CONTROLLER, 250VAC, 3A: UNMP Condition Codes:: NSFS New Surplus Factory Sealed OEM NSMP Manufacturer Package NSNP No NUPI Unused Previously Installed REMAN Remanufactured Like Used or Repaired About our product: Industrial Blue line Special is an Industrial surplus dealer.

part #: knox090034703-e5cn-r2mt-500 prices

• $15.00-$111.00

specifications temperaturcontr:

• brand: Industrial Mro
• mpn: Knox090034703-e5cn-r2mt-500

returns temperaturcontr:

• time: 30 Days
• method: Money back
• paid by: Buyer
• policy: Returns Accepted

seller temperaturcontr:

• city: Camarillo, California
• rating: 99.9%
• # reviews: 18006

payments temperaturcontr:

• credit card: Diners-club
• wallet: Paypal
• other

offer temperaturcontr:

• started: April 28, 2026
• sold: 0
• quantity: 1
• best offers: True
• options: Ship-to-home
• availability: In Stock

general temperaturcontr:

• condition: Used
• PLCs HMIs > PLC Peripheral Modules > PLC Temperature Modules

shipping temperaturcontr:

• type: Calculated
• service: UPS Ground, UPS 2nd Day Air, UPS Next Day Air
• cost: $0.00
• carrier: UPS
• transit: 2-4 Days
• class: Standard, Expedited, One-day

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