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Allen Bradley 1757-SRM System Redundancy Module
- Product Details
- FAQs
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Product Introduction
The Allen-Bradley 1757-SRM System Redundancy Module is designed to provide high-availability control architecture within industrial automation systems. It enables redundant processor configurations, ensuring continuous system operation in the event of a primary controller failure.
Installed within a ControlLogix chassis, the 1757-SRM synchronizes two controllers and manages switchover operations automatically and seamlessly. This redundancy capability is critical for mission-critical applications where downtime is unacceptable, such as power generation, oil & gas, chemical processing, and continuous manufacturing systems.
The module operates through the system backplane and is engineered for deterministic synchronization, fast fault detection, and smooth failover performance.
Product Specifications
| Parameter | Description |
|---|---|
| Model Number | 1757-SRM |
| Product Type | System Redundancy Module |
| Primary Function | Enables controller redundancy and automatic switchover |
| Platform Compatibility | ControlLogix redundancy systems |
| Installation Method | ControlLogix chassis mounting |
| Backplane Current Consumption | 0.75 A @ 3.3 VDC / 1 A @ 5.1 VDC / 0.16 A @ 24 VDC |
| Power Dissipation | 11.28 W |
| Diagnostics | Status LEDs and system redundancy indicators |
| Operating Environment | Industrial control cabinets |
| Dimensions | 145 × 70 × 140 mm |
| Weight | 0.452 kg |
Applications
● Controller redundancy implementation for high-availability automation systems.
● Continuous process industries such as oil & gas, petrochemical, and power plants.
● Critical manufacturing systems requiring zero or minimal downtime.
● Redundant PLC architectures in distributed control environments.
● Infrastructure systems where operational continuity is mandatory.
● High-reliability industrial networks with automatic failover capability.
Advantages
● Automatic switchover capability ensures uninterrupted operation during controller failure.
● Deterministic synchronization between primary and secondary controllers.
● Reduced downtime risk in mission-critical processes.
● Seamless integration within ControlLogix redundancy platforms.
● Built-in diagnostic indicators for fast redundancy status monitoring.
● Industrial-grade reliability designed for 24/7 continuous operation.
FAQ
-
What is the primary function of the 1757-SRM?
It enables redundant controller configurations and manages automatic switchover between primary and standby processors. -
How does the module handle controller synchronization?
It continuously synchronizes memory, I/O status, and execution state between the primary and secondary controllers to ensure seamless transition during failover. -
What happens during a primary controller failure?
The module initiates an automatic switchover to the secondary controller with minimal interruption to system execution. -
Does the redundancy transition affect I/O data integrity?
No, the module maintains deterministic synchronization to preserve I/O and process data consistency during switchover. -
Is special configuration required to enable redundancy?
Yes, redundancy must be configured within the ControlLogix engineering software, including synchronization and communication parameters. -
Can the module detect communication loss between redundant controllers?
Yes, it continuously monitors controller communication and triggers appropriate fault handling if synchronization is lost. -
What types of applications typically require this module?
It is used in high-availability systems such as power generation, oil & gas processing, chemical plants, and continuous manufacturing lines. -
Does the 1757-SRM support automatic recovery after a fault?
Yes, once the fault condition is resolved, the system can resynchronize and restore redundancy status. -
How is redundancy status monitored?
Redundancy and synchronization states are indicated via front-panel LEDs and system diagnostic information. -
Is the module compatible with all ControlLogix processors?
It must be used with processors and firmware versions that support redundancy architecture within the ControlLogix platform.
Related Models
| Model | Description |
|---|---|
| 1756-RM2 | ControlLogix Redundancy Module |
| 1756-L71 | ControlLogix Logix5571 Processor |
| 1756-L72 | ControlLogix Logix5572 Processor |
| 1756-L73 | ControlLogix Logix5573 Processor |
| 1756-L81E | ControlLogix 5580 Processor |
| 1756-L83E | High-Performance 5580 Processor |
Popular Models
| Model | Description |
|---|---|
| 1756-RM2 | Widely used redundancy module |
| 1756-L72 | Standard redundancy-compatible processor |
| 1756-L73 | High-capacity ControlLogix CPU |
| 1756-L81E | Modern 5580 series processor |
| 1756-L83E | Advanced high-performance processor |
| 1756-L85E | High-end ControlLogix processor |
| Company Information | ||||||||
| [email protected] | ||||||||
| Mobile | +8613666033393 | |||||||
| +8613666033393 | ||||||||
| 13666033393 | ||||||||
| Add | Room 1004, No. 62 Xiangxiu Li, Siming District, Xiamen City, Fujian Province, China | |||||||
Excellent PLC Co., Ltd. has a large number of brand new and original PLC and DCS spare parts, with more than 60 cooperative countries. All products are guaranteed for 1 year and delivered to you by high-quality express. We are committed to using the best products and the most favorable prices to meet the needs and friendship of our customers. We have won the trust of thousands of customers, including these excellent customers.
As for the delivery time, when we receive your order requirements, we will arrange for warehouse personnel to test and verify the products. After you place the order, we will send it to you within 24 hours.
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