Description
Allen-Bradley 1785-CHBM: High-Speed Channel Interface Module for Legacy PLC Systems

If you’re working with Allen-Bradley’s legacy PLC-5 systems, the 1785-CHBM module is a game-changer for high-speed data communication. This Channel Interface Module allows seamless integration of remote I/O systems and other peripheral devices into your PLC-5 network. From my experience, it seems to be one of the most reliable options when upgrading older systems without replacing the entire infrastructure.
Key Features
- High-Speed Data Transfer: Designed for fast and reliable communication between PLC-5 processors and remote I/O racks, minimizing latency in critical applications.
- Plug-and-Play Compatibility: The module works seamlessly with existing PLC-5 systems, eliminating the need for extensive reconfiguration.
- Durable Build: Its rugged design ensures stable performance even in demanding industrial environments, which is something I’ve noticed customers appreciate.
- Diagnostic LEDs: Built-in indicators provide real-time status updates, making troubleshooting faster and easier.
Technical Specifications
| Specification | Details |
|---|---|
| Brand/Model | Allen-Bradley 1785-CHBM |
| HS Code | 85371099 |
| Power Requirements | 5V DC (supplied via backplane) |
| Dimensions & Weight | Approx. 6.5 x 3 x 2 inches; ~1 lb |
| Operating Temperature | 0°C to 60°C (32°F to 140°F) |
| Signal Input/Output Types | Digital signals compatible with PLC-5 systems |
| Communication Interfaces | Remote I/O Scanner Port |
| Installation Method | DIN rail or panel mounting |
Application Fields
The 1785-CHBM is widely used in industries that rely on legacy PLC-5 systems but require modernized connectivity. Typical applications include automotive assembly lines, water treatment facilities, and material handling systems. In many cases, this module bridges the gap between outdated equipment and newer peripherals, extending the life of existing infrastructure while maintaining efficiency.
Advantages & Value
One thing I appreciate about the 1785-CHBM is its cost-effectiveness compared to full system overhauls. It offers excellent reliability and compatibility with minimal setup hassle. For procurement teams, this translates to reduced downtime during upgrades and significant savings on capital expenditures. Additionally, Allen-Bradley’s robust technical support ensures peace of mind throughout the product lifecycle.
Installation & Maintenance
Installing the 1785-CHBM typically involves securing it onto a DIN rail or panel within an electrical cabinet. Ensure proper ventilation around the module to prevent overheating, as enclosed spaces can sometimes pose challenges. Wiring should follow standard PLC-5 guidelines, and users are advised to double-check connections before powering up. Routine maintenance includes periodic cleaning of dust from vents and firmware updates if applicable. Calibration isn’t usually required unless specific application demands dictate otherwise.
Quality & Certifications
This module complies with industry standards such as CE, UL, and RoHS, ensuring safety and environmental responsibility. Allen-Bradley backs the 1785-CHBM with a standard warranty policy, providing coverage for manufacturing defects over a defined period. You might notice that these certifications give buyers added confidence in long-term performance.
Our order placement process guarantees a smooth experience: delivery times range from one week for in-stock items to no more than a month for special orders. We accept 50% advance payment, with the balance due upon delivery. Express shipping via FedEx, UPS, or DHL ensures your components arrive quickly and securely.








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