Distributed I/O Cables Allen-Bradley 1790-15CMCBL
The 1790-15CMCBL is an official expansion ribbon cable designed for the Allen-Bradley CompactBlock LDX distributed I/O system. It provides local signal backplane connectivity between a primary CompactBlock LDX base module and an expansion I/O module. Measuring 15 cm in length, this extended ribbon cable allows maintenance and control system engineers to position adjacent expansion modules with up to 7 cm (2.76 in.) of physical separation on standard DIN rails, simplifying panel wire routing and thermal management in high-density control enclosures.
Extended Distance Inter-Module Connectivity
In standard CompactBlock LDX distributed I/O layouts, base units connect directly to expansion blocks via standard short interconnects. The 1790-15CMCBL addresses spatial constraints inside enclosure layouts where components cannot be mounted immediately side-by-side. The 15 cm flexible ribbon cable transfers internal communication logic and power buses between the base block and the extension block without degradation, ensuring seamless integration within DeviceNet and other supported fieldbus architectures.
Structural Specifications & Pack Quantity
Constructed with industrial-grade flat ribbon cabling and factory-terminated connectors, the 1790-15CMCBL ensures secure multi-pin alignment with low insertion resistance. Each standard ordering package under part number 1790-15CMCBL contains a factory lot of 5 cables.
| Parameter | Specification |
|---|---|
| Model | 1790-15CMCBL |
| Brand | Allen-Bradley / Rockwell Automation |
| Product Type | CompactBlock LDX I/O Expansion Cable |
| Cable Type | Flexible Flat Ribbon Cable |
| Cable Length | 15 cm |
| Maximum Module Spacing | Up to 7 cm (2.76 in.) |
| Net Weight | 0.02 lbs (per cable unit) |
| Standard Pack Quantity | 5 pieces per box/lot |
| System Compatibility | Allen-Bradley CompactBlock LDX Distributed I/O Series |
Installation Guidelines
Before installing or replacing the 1790-15CMCBL, ensure that all main logic power and field-side power supply lines feeding the base CompactBlock LDX unit are disconnected. Align the cable connector keyways with the expansion ports on both the base block and the expansion module, pressing firmly until fully seated. Ensure the ribbon cable is not bent beyond its natural flex radius or pressed against sharp metal edges inside the cabinet.
Frequently Asked Questions
Q: Why choose the 1790-15CMCBL cable instead of standard direct block-to-block connection?
A: The 1790-15CMCBL provides a 15 cm cable length, allowing up to 7 cm (2.76 in.) of clearance between adjacent CompactBlock LDX modules. This extra space helps route heavy field wiring or navigate obstacles on panel DIN rails.
Q: How many cables are included under the 1790-15CMCBL part number?
A: Ordering part number 1790-15CMCBL supplies a factory lot containing 5 individual ribbon cables.
Distributed I/O Cables Allen-Bradley 1790-15CMCBL
Distributed I/O Cables Allen-Bradley 1790-15CMCBL
The 1790-15CMCBL is an official expansion ribbon cable designed for the Allen-Bradley CompactBlock LDX distributed I/O system. It provides local signal backplane connectivity between a primary CompactBlock LDX base module and an expansion I/O module. Measuring 15 cm in length, this extended ribbon cable allows maintenance and control system engineers to position adjacent expansion modules with up to 7 cm (2.76 in.) of physical separation on standard DIN rails, simplifying panel wire routing and thermal management in high-density control enclosures.
Extended Distance Inter-Module Connectivity
In standard CompactBlock LDX distributed I/O layouts, base units connect directly to expansion blocks via standard short interconnects. The 1790-15CMCBL addresses spatial constraints inside enclosure layouts where components cannot be mounted immediately side-by-side. The 15 cm flexible ribbon cable transfers internal communication logic and power buses between the base block and the extension block without degradation, ensuring seamless integration within DeviceNet and other supported fieldbus architectures.
Structural Specifications & Pack Quantity
Constructed with industrial-grade flat ribbon cabling and factory-terminated connectors, the 1790-15CMCBL ensures secure multi-pin alignment with low insertion resistance. Each standard ordering package under part number 1790-15CMCBL contains a factory lot of 5 cables.
| Parameter | Specification |
|---|---|
| Model | 1790-15CMCBL |
| Brand | Allen-Bradley / Rockwell Automation |
| Product Type | CompactBlock LDX I/O Expansion Cable |
| Cable Type | Flexible Flat Ribbon Cable |
| Cable Length | 15 cm |
| Maximum Module Spacing | Up to 7 cm (2.76 in.) |
| Net Weight | 0.02 lbs (per cable unit) |
| Standard Pack Quantity | 5 pieces per box/lot |
| System Compatibility | Allen-Bradley CompactBlock LDX Distributed I/O Series |
Installation Guidelines
Before installing or replacing the 1790-15CMCBL, ensure that all main logic power and field-side power supply lines feeding the base CompactBlock LDX unit are disconnected. Align the cable connector keyways with the expansion ports on both the base block and the expansion module, pressing firmly until fully seated. Ensure the ribbon cable is not bent beyond its natural flex radius or pressed against sharp metal edges inside the cabinet.
Frequently Asked Questions
Q: Why choose the 1790-15CMCBL cable instead of standard direct block-to-block connection?
A: The 1790-15CMCBL provides a 15 cm cable length, allowing up to 7 cm (2.76 in.) of clearance between adjacent CompactBlock LDX modules. This extra space helps route heavy field wiring or navigate obstacles on panel DIN rails.
Q: How many cables are included under the 1790-15CMCBL part number?
A: Ordering part number 1790-15CMCBL supplies a factory lot containing 5 individual ribbon cables.
