AUTONICS SRH1-1220-N Automation

( Brand: Autonics ), ( Manufacturer Part Number: SRH1-1220-N )

Review AUTONICS Srh11220n Used

The **Autonics SRH1-1220-N (SRH11220N)** is a high-performance, compact servo drive designed to deliver precise motion control in industrial automation applications. Part of Autonics advanced SRH series, this drive is engineered to seamlessly integrate with servo motors, providing reliable and efficient power conversion for dynamic positioning, speed regulation, and torque control. With a robust **1200W (1.6 HP) continuous power rating**, the SRH1-1220-N excels in demanding environments where high torque, rapid acceleration, and smooth deceleration are essential such as in packaging machinery, CNC systems, robotics, and material handling equipment. Its **PWM (Pulse Width Modulation) control architecture** ensures minimal energy loss and superior response times, making it ideal for applications requiring sub-millisecond positioning accuracy.

The drive features a **dual-axis capability**, allowing it to control two servo motors simultaneously from a single unit, which simplifies wiring and reduces system complexity while maintaining high efficiency. Its **vector control algorithm** optimizes motor performance across varying loads, ensuring consistent torque delivery even under fluctuating operational conditions. The SRH1-1220-N is equipped with **Autonics proprietary SRH control technology**, which enhances dynamic performance by dynamically adjusting current and voltage profiles to minimize overshoot, vibration, and mechanical stress on the motor and mechanical components. This results in longer equipment lifespan and improved overall system reliability.

For ease of integration and operation, the drive includes a **user-friendly front-panel interface** with an **LCD display** and **intuitive navigation buttons**, allowing for on-the-fly parameter adjustments, fault diagnostics, and real-time monitoring. Communication is facilitated via **Profibus DP, DeviceNet, EtherCAT, and Modbus RTU/TCP**, ensuring seamless compatibility with modern PLCs, HMIs, and industrial networks. Additionally, the drive supports **Autonics SRH Motion Control software**, enabling advanced programming, trajectory planning, and synchronization with other motion axes for complex multi-axis applications. Its **compact, IP65-rated enclosure** ensures durability in harsh industrial settings, while its **wide operating temperature range (-10 C to 55 C)** expands its applicability in diverse environments.

Safety and efficiency are prioritized with features such as **overcurrent, overtemperature, and short-circuit protection**, along with **regenerative braking** to recover energy during deceleration, reducing power consumption and heat buildup. The SRH1-1220-N also supports **position, speed, and torque feedback** via encoder inputs, enabling closed-loop control for unparalleled precision. Whether deployed in high-speed packaging lines, precision assembly systems, or automated material transport, this servo drive delivers the power, flexibility, and reliability required to meet the most stringent industrial motion control demands. Its combination of advanced technology, ease of use, and robust construction makes it a versatile solution for engineers seeking to optimize productivity and reduce downtime in their automation systems.

### **Pros and Cons of buying a Autonics SRH1-1220-N (SRH11220N)**

The **Autonics SRH1-1220-N** is a **120V AC, 20A, single-phase relay**, commonly used in industrial automation, PLC control systems, and motor starters. Below is a detailed breakdown of its advantages and disadvantages.

---

### **Pros**

1. **High Reliability and Durability**

- Designed for industrial environments, the SRH1-1220-N is built to withstand frequent switching cycles, vibration, and temperature fluctuations.

- Uses high-quality contact materials (likely silver or silver-plated) for long-term durability and low contact resistance.

2. **Compact and Space-Efficient Design**

- The **12mm width** (standard DIN rail mount) makes it suitable for applications where space is limited.

- Compatible with standard **35mm DIN rail**, allowing easy integration into control panels.

3. **Wide Operating Voltage Range**

- Supports **100 120V AC** (with a tolerance for slight variations), making it versatile for different power supply conditions.

- Can handle **20A at 120V AC**, suitable for medium-power loads like small motors, solenoids, and heating elements.

4. **Fast Switching Speed**

- Designed for **high-speed operation**, reducing latency in control systems where rapid relay actuation is required.

- Low contact bounce ensures clean switching for sensitive applications.

5. **Overload and Short-Circuit Protection**

- Some models in the SRH series include **built-in arc suppression** to prevent welding of contacts under high inrush currents.

- Can be paired with **fuses or circuit breakers** for additional protection (though the relay itself does not have built-in overload protection).

6. **Compatibility with PLCs and Control Systems**

- Standard **NO (Normally Open) and NC (Normally Closed) contacts** allow easy integration with **PLCs, timers, and relays**.

- Works well with **Autonics own controllers** as well as third-party systems (e.g., Siemens, Allen-Bradley, Omron).

7. **Low Power Consumption**

- The coil typically operates at **low voltage (e.g., 24V DC or 120V AC)**, making it energy-efficient for control applications.

8. **Easy Installation and Wiring**

- **Terminal block connections** simplify wiring, reducing installation time.

- **DIN rail mounting** allows for quick panel integration without additional hardware.

9. **Cost-Effective for Medium-Duty Applications**

- More affordable than **solid-state relays (SSR)** for AC loads, making it a practical choice for budget-conscious projects.

- Long lifespan reduces long-term replacement costs.

10. **Wide Temperature Range**

- Typically operates in ** 25 C to 70 C**, suitable for indoor and outdoor industrial applications.

---

### **Cons**

1. **Mechanical Wear Over Time**

- Unlike **solid-state relays (SSRs)**, which have no moving parts, the SRH1-1220-N has **contacts that can wear out** with frequent switching (though it is designed for high durability).

- **Lifespan depends on switching cycles** excessive use may require eventual replacement.

2. **Arcing and Contact Erosion Risk**

- When switching **inductive loads (e.g., motors, solenoids)**, **arcs can form**, leading to **contact pitting and eventual failure**.

- Requires **snubber circuits or flyback diodes** to mitigate arcing damage.

3. **Limited Current Rating for Heavy Loads**

- **20A at 120V AC** is sufficient for many applications but **not for high-power motors or heavy-duty machinery**.

- For loads exceeding **15 20A**, a **higher-rated relay or contactor** may be needed.

4. **No Built-In Overload Protection**

- Unlike **motor starters or magnetic contactors**, the SRH1-1220-N **does not include thermal overload protection**.

- Users must add **separate overload relays or fuses** for motor protection.

5. **Sensitivity to Voltage Spikes**

- **Transient voltage spikes** (from inductive loads or power surges) can damage the relay coil or contacts.

- Requires **proper surge protection** in harsh electrical environments.

6. **Coil Voltage Dependency**

- The **coil voltage (e.g., 24V DC)** must match the control system s output; mismatched voltages can lead to **inconsistent operation or damage**.

- Some versions may require **external resistors** for proper coil operation.

7. **Limited Environmental Resistance (Compared to High-End Relays)**

- While durable, it may **not be as robust as military-grade or explosion-proof relays** for extreme conditions (e.g., high humidity, corrosive environments).

- **IP rating is typically not specified**, so it may not be suitable for **dusty or wet environments** without additional protection.

8. **Potential for Contact Welding**

- If the relay is **held energized for long periods**, contacts may **weld together**, requiring manual reset.

- **Preventable with proper de-energization timing** in control logic.

9. **No Built-In Diagnostics**

- Unlike some **smart relays**, the SRH1-1220-N **does not provide status feedback** (e.g., contact position, coil failure).

- Troubleshooting may require **external monitoring**.

10. **Compatibility Issues with Some Control Systems**

- While widely compatible, **some PLCs or custom control systems** may require **specific coil voltages or wiring configurations**.

- Always **check datasheet compatibility** before integration.

---

### **Conclusion**

The **Autonics SRH1-1220-N** is a **reliable, cost-effective relay** suitable for **medium-duty industrial applications** where **compact size, fast switching, and DIN rail mounting** are required. It excels in **control systems, motor starters (with proper snubbing), and general AC switching** up to **20A at 120V**.

However, it has **limitations in heavy-duty, high-vibration, or unprotected environments**, where **mechanical wear, arcing, and lack of built-in protection** could become issues. For **long-term reliability in harsh conditions**, pairing it with **snubber circuits, overload protection, and proper enclosure sealing** is essential.

If your application involves **frequent switching of inductive loads, high-power motors, or extreme environments**, consider **upgrading to a contactor, SSR, or a higher-rated relay** (e.g., **Autonics SRH2 series or a magnetic starter**).

---

### **Final Recommendation**

You need a **reliable, compact relay** for **medium-power AC loads (up to 20A at 120V)**.

Your application requires **fast switching** (e.g., PLC control, timing circuits).

You are working in a **controlled industrial environment** with **proper snubbing and protection**.

**Cost efficiency** is a priority, and you can accept **mechanical wear over time**.

You are switching **high-power motors or heavy loads** (use a **contactor instead**).

Your environment has **frequent voltage spikes, extreme dust, or high humidity** (opt for **IP-rated or explosion-proof relays**).

You need **long-term maintenance-free operation** (SSRs or **solid-state relays** may be better).

You require **built-in overload protection** (add a **separate thermal relay or fuse**).

- Always **install a flyback diode** when switching inductive loads.

- Use **proper fusing** to protect against short circuits.

- Ensure **correct coil voltage** matches your control system.

- **Test contacts periodically** for wear, especially in high-cycle applications.

- Consider **enclosure sealing** if used in dusty or wet conditions.

For most **standard industrial control applications**, the **SRH1-1220-N is a solid choice** just ensure proper **circuit protection and environmental safeguards** to maximize its lifespan.

Details:

All products are guaranteed to be working but may show signs of use if purchasing a used product. Call to use a shipping service other than the ones listed. Sells new and surplus product develops channels to purchase such. Function ZERO CROSS TURN-ON.

Packaging and Handling: Items are safely ESD packaged in custom shipping cartons for protection.

part #: srh11220 prices

• $35.00-$45.00

specifications automationjack:

• brand: Autonics
• mpn: Srh1-1220-n

seller automationjack:

• # reviews: 188502
• rating: 99.5%
• city: 1 Millennium Dr, Willingboro, NJ 08046

returns automationjack:

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

shipping automationjack:

• cost: $12.90
• type: Fixed
• transit: 30-35 Days
• class: Standard
• service: Standard

offer automationjack:

• availability: In Stock
• started: February 3, 2026
• options: Ship-to-home
• quantity: 1
• sold: 0

general automationjack:

• Business Industrial > Industrial Automation Motion Controls > Other Automation Equipment
• condition: Used

payments automationjack:

• wallet: Apple-pay
• credit card: Discover
• other

Autonics SRH1-1220 Is Similar To:

• Autonics E40h12-200-3-n-24 E40h122003n24 Used (54.8% similar) All products are guaranteed to be working but may show signs of use if purchasing a used product. Call to use a shipping service other than the ones listed. Packaging and handling: items are safely eds packaged in custom shipping cartons for protection. Sells new and surplus product develops ...(January 5th, 2025)
• Autonics Srh1-1240-n Srh11240n Used (94.6% similar) All products are guaranteed to be working but may show signs of use if purchasing a used product. Sells new and surplus product develops channels to purchase such. Function zero cross turn-on. Packaging and handling: items are safely eds packaged in custom shipping cartons for protection. Call to ...(March 7th, 2026)