Allen‑Bradley 1756‑RM2 Description
The Allen-Bradley 1756-RM2 is a specialized module designed for the ControlLogix® system, enabling the creation of a redundant controller pair. This module is essential for applications where system downtime can result in significant financial loss or safety hazards. By maintaining a synchronized backup controller, the 1756-RM2 ensures a seamless and automatic switchover in the event of a primary controller, chassis, or network fault.
Key Features & Benefits:
- Controller Redundancy: Facilitates a hot-standby configuration where a secondary controller automatically takes over control if the primary controller fails, minimizing process interruption.
- High-Speed Synchronization: Uses a dedicated, high-speed coaxial cable connection to synchronize data between the primary and secondary controllers, ensuring the backup is always up-to-date.
- Automatic Switchover: The transition from primary to secondary controller is automatic and typically occurs within milliseconds, often without the process ever detecting a fault.
- Comprehensive Diagnostics: Provides detailed status information and diagnostic LEDs to monitor the health of the redundancy pair and the synchronization link.
- Flexible Configuration: Can be configured and monitored using RSLogix 5000 or Studio 5000 Logix Designer software, integrating seamlessly into your existing programming environment.
- Robust Design: Built for the demanding environments of industrial automation, ensuring reliable performance in applications like power generation, water treatment, and continuous manufacturing.
1756-RM2 Technical Specifications:
| Manufacturer | Allen Bradley |
|---|---|
| Product Type | Redundancy Module |
| Product Line | ControlLogix |
| Part Number | 1756-RM2 |
| UPC | 884951800434 |
| Weight | 0.69 lbs (0.31 kg) |
| Current Draw at 5.1 Volts | 1.16 Amps |
| Current Draw at 24 Volts | 3.4 mA |
| Maximum Power Dissipation | 6 Watts |
| Thermal Dissipation | 21 BTU per Hour |
| Maximum Connector Cable Length | 10 Meters |
| Slot Width | 1 Slot |
| Module Location | Any Slot in Chassis |
| Enclosure Type | None (Open Style) |
| Operating Temperature | 0 to 60 Degrees Celsius |
Why Choose the 1756-RM2?
For mission-critical applications, the 1756-RM2 is the definitive solution for ensuring system availability. Its proven track record in various industries makes it the trusted choice for engineers and plant managers who cannot afford unexpected downtime.
Application Scenarios
Ideal for critical manufacturing, energy, water‑treatment, oil‑gas, process automation requiring zero‑downtime ControlLogix redundant hot‑standby PLC architecture. One module required per redundant chassis pair.
Package Information
- Net Weight: 0.29 kg
- Gross Weight: 0.42 kg
- Packing Size: 225 ×130 ×60 mm
Notes
1756‑RMC series fiber‑optic sync cable NOT included. Must be ordered separately for inter‑chassis redundancy link. 1756‑RM2 cannot mix‑operate with older‑generation 1756‑RM / 1756‑RMXT modules; pair 1756‑RM2 only with another 1756‑RM2 /1756‑RM2XT unit for full gigabit performance.
Documents
| General | Publication |
|---|---|
| Selection Guide | 1756-SG001 |
| Technical Detail | — |
| Product Cutsheet | — |
| Technical Data | Publication |
|---|---|
| 1756-td001_-en-p | 1756-TD001 |
