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- Allen Bradley
- 1769-CRR1
- CompactLogix I/O Module
- USA
- 118 mm × 87 mm × 50 mm
- 0.31kg
- Xiamen, China
- New & In Stock
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Technical Report: 1769-CRR1 Compact I/O Right-to-Right Bus Expansion Cable
1. Product Overview
The 1769-CRR1 is a Compact I/O right-to-right bus expansion cable designed for industrial automation systems using Compact I/O architecture. It is used to extend the communication backplane between multiple I/O banks while maintaining synchronized data transmission and stable system operation.
This cable assembly is a structural and communication accessory rather than a control or signal-processing module. It allows separate Compact I/O module groups to operate as part of the same automation system even when installed in different physical positions within a control cabinet.
The 1769-CRR1 is commonly applied in modular PLC systems where cabinet space limitations, power segmentation, or distributed I/O layout requirements make a single continuous I/O bank impractical.
2. Brand and Series Information
Brand: Allen-Bradley
Series: 1769 Compact I/O Series
Product Family: Compact I/O Expansion Accessories
Module Type: Right-to-Right Bus Expansion Cable
3. Product Function Description
The 1769-CRR1 functions as a backplane communication bridge between Compact I/O module banks.
Main functions include:
- Extending Compact I/O backplane communication
- Connecting two right-side I/O banks
- Supporting modular and distributed cabinet layouts
- Maintaining synchronized communication between separated module groups
- Allowing multiple independent power supply sections
- Supporting scalable system expansion
The cable allows Compact I/O systems to be separated into multiple sections without interrupting PLC communication integrity.
It is especially useful in medium and large industrial control systems where multiple DIN rail sections are used inside a control cabinet.
4. Technical Parameters
Electrical and Communication Specifications
| Parameter | Value |
|---|---|
| Product Type | Compact I/O bus expansion cable |
| Communication Type | Backplane bus extension |
| Compatible Architecture | 1769 Compact I/O platform |
| Maximum System Expansion | Up to 3 I/O banks |
| Maximum Expansion Cables | 2 cables per system |
| Signal Transmission | Parallel backplane communication |
| Isolation Voltage | 30 V continuous |
| Communication Purpose | Inter-bank synchronization |
Mechanical Specifications
| Parameter | Value |
|---|---|
| Cable Length | 0.3 m (1 ft) |
| Connector Configuration | Right-to-right connection |
| Mounting Method | Plug-in backplane connection |
| Physical Dimensions (reference installed size) | Approx. 118 mm × 87 mm × 50 mm |
| Cable Material | Industrial shielded cable |
| Weight | 0.28 kg – 0.31 kg |
| Housing Material | Industrial reinforced polymer |
Environmental Specifications
| Parameter | Value |
|---|---|
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Relative Humidity | 5% – 95% non-condensing |
| Vibration Resistance | IEC industrial standard |
| Shock Resistance | Industrial control cabinet rated |
| EMC Compatibility | Industrial automation environment compliant |
5. Product Advantages
1. Flexible Control Cabinet Design
The cable enables I/O modules to be installed in multiple cabinet sections without affecting system communication.
2. Stable Backplane Communication
Provides reliable high-speed synchronization between separate Compact I/O banks.
3. Simplified System Expansion
Allows future I/O expansion without redesigning the complete control architecture.
4. Independent Power Grouping
Supports separation of I/O banks into independently powered sections, improving electrical stability.
5. Improved Installation Flexibility
Useful in cabinets where DIN rail space is limited or distributed installation is required.
6. Industrial Reliability
Designed for continuous operation in industrial automation environments with vibration and electrical noise.
6. Application Areas
The 1769-CRR1 is commonly used in:
- CompactLogix PLC systems
- Distributed industrial I/O systems
- Manufacturing production lines
- Conveyor and logistics automation systems
- Packaging machinery
- Automotive assembly systems
- Process automation cabinets
- Multi-zone industrial machine control systems
It is particularly suitable for systems requiring modular layout flexibility and scalable expansion architecture.
7. Recommended Models (Same Series or Related Models)
| Model | Type | Key Parameters | Application |
|---|---|---|---|
| 1769-CRL1 | Right-to-Left Expansion Cable | 0.3 m cable, mixed-side connection | Flexible I/O bank expansion |
| 1769-CRR3 | Right-to-Right Expansion Cable | 1 m cable length | Extended cabinet layouts |
| 1769-CLL1 | Left-to-Left Expansion Cable | Short-distance I/O segmentation | Multi-bank systems |
| 1769-CLL3 | Left-to-Left Expansion Cable | 1 m expansion cable | Large cabinet systems |
| 1769-AENTR | EtherNet/IP Adapter | Dual-port Ethernet communication | Distributed remote I/O |
8. Other Popular Models (Same Brand – Widely Used)
| Model | Type | Key Parameters | Application |
|---|---|---|---|
| 1769-L33ER | PLC Controller | Integrated EtherNet/IP, 2 MB memory | Machine automation |
| 1769-L36ERM | PLC Controller | High-performance CPU with motion support | Advanced automation systems |
| 1769-SDN | DeviceNet Scanner Module | DeviceNet master communication | Legacy fieldbus systems |
| 1769-IF8 | Analog Input Module | 8-channel analog input | Process signal acquisition |
| 1769-PA4 | AC Power Supply Module | 120/240V AC input | Compact I/O power distribution |
9. System Architecture Role
Within a Compact I/O system, the 1769-CRR1 serves as an infrastructure component rather than an active control device. Its role is critical in maintaining communication continuity across physically separated module groups.
By enabling multi-bank architecture, the cable helps engineers design more organized and scalable industrial control cabinets. It also improves maintenance convenience by allowing module grouping based on machine zones or power distribution requirements.
10. Summary
The 1769-CRR1 is an essential Compact I/O expansion accessory designed for extending backplane communication between separate I/O banks. Although it does not directly process signals or execute PLC logic, it plays a vital role in maintaining system architecture flexibility and communication integrity.
Its major advantages include scalable expansion capability, reliable industrial communication performance, modular cabinet layout support, and simplified system segmentation.
The module is widely used in medium and large industrial automation systems where distributed I/O architecture and flexible cabinet organization are required.