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Omron CJ1W-SRM21
by Omron
Read verified buyer reviews ↓OverviewThe Omron CJ1W-SRM21 CompoBus/S Master Unit is engineered to revolutionize industrial automation by providing seamless, high-speed communication within your CJ-Series Programmable Logic Controller (PLC) systems. This advanced master unit is the backbone for efficient I/O networking, enabling rapid and reliable data exchange across a multitude of remote devices. Supporting an impressive capacity of up to 256 I/O points and proficiently managing up to 32 slave devices, the CJ1W-SRM21 is the ideal solution for demanding applications that require unparalleled speed and precision in data handling.Key Features High I/O Capacity: Designed for expansive system configurations, this master unit supports a formidable 256 I/O points (128 inputs and 128 outputs), providing ample capacity for complex industrial setups. Multiple Slave Support: Enhance your network's flexibility with the ability to manage communication with up to 32 independent slave devices, streamlining your industrial processes. Fast Communication Cycle: Achieve critical timing with an ultra-fast communication cycle time of 0.5 ms at 750 kbps, guaranteeing prompt and efficient data transmission for real-time control. Extended Communication Distance: Facilitates large-scale installations with reliable communication distances up to 500 meters at 93.75 kbps in long-distance mode, ensuring connectivity across vast operational areas. Flexible Wiring Options: Benefit from adaptable network layouts with free wiring capabilities, including various branching methods that support up to 200 meters in long-distance communication mode. Compact Design: Optimize valuable control panel space with its compact, DIN rail mountable form factor, measuring a mere 90 mm (H) × 31 mm (W) × 65 mm (D). Technical Specifications Model Number: CJ1W-SRM21 Communication Protocol: CompoBus/S Supported I/O Points: Up to 256 (128 inputs and 128 outputs) Maximum Slave Devices: 32 Communication Cycle Time: 0.5 ms at 750 kbps Communication Distance: High-Speed Mode: Up to 100 m (main line) at 750 kbps Long-Distance Mode: Up to 500 m (main line) at 93.75 kbps Wiring Flexibility: Supports free wiring with branching up to 200 m in long-distance mode Mounting: DIN rail Power Consumption: 5 VDC, 0.15 A Operating Temperature Range: 0°C to 55°C Dimensions: 90 mm (H) × 31 mm (W) × 65 mm (D) Certifications: CE, cULus, Lloyds Applications Distributed I/O Systems: Seamlessly manages remote I/O devices, enhancing operational efficiency in diverse manufacturing and processing plants. Material Handling: Provides precise control for conveyors and sophisticated sorting systems, enabling high-speed data exchange for optimized logistics. Packaging Machinery: Attunes and synchronizes multiple actuators and sensors, ensuring coordinated and efficient operations in packaging processes. Building Automation: Integrates various advanced building management systems, facilitating centralized control and intelligent facility management. Why ChooseThe Omron CJ1W-SRM21 CompoBus/S Master Unit stands out as a prime choice for enhancing your industrial automation infrastructure. Its design prioritizes both performance and reliability, ensuring your operations run smoothly and efficiently. With its robust capabilities, it delivers: Enhanced Network Efficiency: Its high-speed communication significantly reduces latency, leading to superior overall system performance and responsiveness. Scalable Architecture: The capacity to support a large array of I/O points and numerous slave devices provides a flexible and scalable architecture, ready for future system expansions and evolving demands. Reliable Performance: Engineered for stable and consistent operation within challenging industrial environments, this unit features robust communication protocols that guarantee unwavering reliability. Easy Integration: Enjoy effortless integration with Omron's renowned CJ-Series PLCs, simplifying the design, implementation, and maintenance of your automation systems. Order NowUpgrade your industrial control systems with the Omron CJ1W-SRM21 CompoBus/S Master Unit. Experience enhanced speed, reliability, and scalability for your automation needs. Contact us today to place your order or to learn more about how this exceptional product can benefit your operations.FAQWhat is the maximum number of I/O points supported by the CJ1W-SRM21?The CJ1W-SRM21 supports up to 256 I/O points, consisting of 128 inputs and 128 outputs.How many slave devices can this master unit manage?This master unit can efficiently manage communication with up to 32 independent slave devices.What is the communication speed of the CJ1W-SRM21?It achieves an ultra-fast communication cycle time of 0.5 ms at 750 kbps in high-speed mode.Can the unit be used for long-distance applications?Yes, in long-distance mode, it supports reliable communication up to 500 meters at 93.75 kbps.What are the mounting options for this device?The CJ1W-SRM21 features a compact design for DIN rail mounting, optimizing control panel space.
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Omron CJ1W-SRM21
Overview
This is a genuine Omron component from the Omron PLCs family. PalmPartsSolution stocks it in new, refurbished, and surplus condition with tested warranty and same-day shipping on in-stock units.
Whether you are sourcing a like-for-like replacement for an existing installation, an emergency spare to keep a line running, or a qualified part for a new build, our team can confirm availability, revision, and lead time before you order.
Key Features
- Genuine Omron catalog part
- Tested before shipment
- Backed by PalmPartsSolution warranty
- Cross-reference and revision assistance available
- Compatible with the broader Omron automation ecosystem
- Engineered to integrate inside Omron PLCs installations
Compatibility
When ordering, match the full catalog/part number, hardware revision, and firmware revision called out by your Omron equipment. Where applicable, confirm:
- Input/output voltage and current rating
- Communication protocol and network role
- Mounting form factor and footprint
- Operating temperature, humidity, and IP rating
- Required certifications (UL, CE, ATEX, marine, etc.)
Not sure which revision you need? Send us the catalog number on the nameplate and we will confirm the correct match.
Replacement Information
Three ways to source this part through PalmPartsSolution:
- Exact replacement — same Omron catalog number, new or refurbished, tested and warrantied
- Form-fit-function equivalent — alternate revision or build that drops in without code changes
- Engineered migration — current-generation Omron platform with documented conversion notes for the Omron PLCs family
Contact our engineering team if you need help choosing between these tracks.
Technical Specifications
- Model Number: CJ1W-SRM21
- Communication Protocol: CompoBus/S
- Supported I/O Points: Up to 256 (128 inputs and 128 outputs)
- Maximum Slave Devices: 32
- Communication Cycle Time: 0.5 ms at 750 kbps
- Communication Distance:
- High-Speed Mode: Up to 100 m (main line) at 750 kbps
- Long-Distance Mode: Up to 500 m (main line) at 93.75 kbps
- Wiring Flexibility: Supports free wiring with branching up to 200 m in long-distance mode
- Mounting: DIN rail
- Power Consumption: 5 VDC, 0.15 A
- Operating Temperature Range: 0°C to 55°C
- Dimensions: 90 mm (H) × 31 mm (W) × 65 mm (D)
- Certifications: CE, cULus, Lloyds
Applications
- Distributed I/O Systems: Seamlessly manages remote I/O devices, enhancing operational efficiency in diverse manufacturing and processing plants.
- Material Handling: Provides precise control for conveyors and sophisticated sorting systems, enabling high-speed data exchange for optimized logistics.
- Packaging Machinery: Attunes and synchronizes multiple actuators and sensors, ensuring coordinated and efficient operations in packaging processes.
- Building Automation: Integrates various advanced building management systems, facilitating centralized control and intelligent facility management.
Why Choose the CJ1W-SRM21?
The Omron CJ1W-SRM21 CompoBus/S Master Unit stands out as a prime choice for enhancing your industrial automation infrastructure. Its design prioritizes both performance and reliability, ensuring your operations run smoothly and efficiently. With its robust capabilities, it delivers:
- Enhanced Network Efficiency: Its high-speed communication significantly reduces latency, leading to superior overall system performance and responsiveness.
- Scalable Architecture: The capacity to support a large array of I/O points and numerous slave devices provides a flexible and scalable architecture, ready for future system expansions and evolving demands.
- Reliable Performance: Engineered for stable and consistent operation within challenging industrial environments, this unit features robust communication protocols that guarantee unwavering reliability.
- Easy Integration: Enjoy effortless integration with Omron's renowned CJ-Series PLCs, simplifying the design, implementation, and maintenance of your automation systems.
Availability & Shipping
- ▸In stock: CJ1W-SRM21 ready for immediate dispatch from our Florida warehouse.
- ▸Free USA shipping: FedEx Priority (2–5 business days) and UPS Ground (3–5 business days). Expedited options available at checkout.
- ▸Worldwide delivery: FedEx International Priority (1–5 days), UPS International Priority (3–5 days), and USPS International (5–10 days) — rates calculated at checkout.
- ▸Bulk pricing: Volume discounts on request — contact our sales team for quantity quotes.
- ▸Buy with confidence: Every CJ1W-SRM21 ships with a 1-Year PALM Parts warranty and a 30-day return window.
Frequently Asked Questions — Omron
Machine down? We ship parts the same day.
New, surplus, and refurbished Omron inventory in stock. Request a quote or speak directly with an automation specialist for emergency sourcing.
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Independent Supplier Notice
PALM Parts Solution operates as an independent industrial automation supplier and is not an authorized distributor or affiliate of any listed manufacturer or brand name. Manufacturer trademarks and product names are used solely for identification purposes. Original manufacturer warranties do not apply. All products sold by PALM Parts are backed by our own 1-year warranty.
Product Condition & Firmware
All products are sold as new unless stated otherwise. Original manufacturer packaging may show signs of handling, storage, or shelf wear. Date codes and series may vary from current factory production. PALM Parts does not guarantee the presence, version, or compatibility of any firmware on PLC or automation products.