Description
The Reliance Electric 770.90.00CXQ is a legacy Multi-Communication Network/Interface (MERI) card designed for the AutoMax distributed control and PLC platform. In industrial automation installations utilizing AutoMax racks, this communication module manages multi-port data routing and backplane interfacing, facilitating serial communications and network bridging between the processor card and external peripherals or distributed nodes.
Product Specifications
| Parameter | Value |
| Manufacturer | Reliance Electric (Baldor / ABB legacy) |
| Product Series | AutoMax PLC Platform |
| Catalog / Part Number | 770.90.00CXQ (Variant of 770.90.00) |
| Module Type | MERI (Multi-Communication Network Interface) Card |
| Backplane Interface | AutoMax Autobus / Rack Backplane |
| Communication Ports | Multi-port serial configuration (Ports 0 through 7 indicators) |
| Diagnostic Indicators | 1 x Ready LED, 8 x Port Status LEDs |
| Enclosure Mounting | Single-slot physical insertion into AutoMax card rack assembly |
| Operating Temperature | 0 to +55 °C (standard industrial enclosure limits) |
| Lifecycle Status | Obsolete / Legacy Hardware (verify support availability) |
Commercial & Logistics Information
- Condition: Refurbished / Tested Surplus or Used Repacked (UMP)
- Availability: Subject to legacy inventory stock; typically sourced via specialized automation surplus suppliers
- Standard Lead Time: 1 to 3 business days for stock items; extended lead times apply if sourcing reconditioned units
- Warranty: Typically 1-year to 3-year vendor-backed warranty depending on supplier terms (verify with procurement contract)
- Pricing Note: Listed price is indicative and volatile due to obsolete hardware scarcity. Contact our engineering sales desk for a formal quotation and current stock availability.
Technical Application & Integration Notes
When installing the 770.90.00CXQ into an existing AutoMax rack assembly, slide the card carefully into an unassigned slot along the backplane guides and secure it using the integrated faceplate mounting brackets and screws. Ensure that the rack power is completely de-energized prior to hardware insertion or removal to prevent backplane bus transients.
Because this module handles multi-port communication tasks, verify DIP switch settings, jumper configurations, and communication protocol parameters against existing system backup files before placing the node back into runtime operation. For legacy systems facing component failure, thoroughly test serial communication lines and terminal strip wiring (eight wire connections per terminal block) to isolate potential physical layer faults from module internal failures.
Frequently Asked Questions
Q: Is the 770.90.00CXQ directly interchangeable with standard 770.90.00 base cards?
A: Suffix variations such as CXQ often designate specific firmware revisions, customer modifications, or specialized hardware builds. Verify exact system compatibility and firmware version match before replacing active nodes.
Q: What diagnostics are available directly on the module faceplate?
A: The module features a central “Ready” LED alongside eight alphanumeric port status LEDs (Port 0 through Port 7) to assist technicians in monitoring active communication channels during troubleshooting.
Q: Are replacement parts or factory repairs still offered by the OEM?
A: No, primary manufacturing and direct support for the AutoMax platform have been discontinued by the original manufacturer. Repairs and replacements are typically handled through certified third-party industrial automation service providers.
