Allen-Bradley 1788-CNC Interface Card | Replacement, Equivalent & Selection Guide
The Allen-Bradley (AB) 1788-CNC is a dedicated CNC Interface Card designed for integration within Rockwell Automation’s ControlNet and PLC-5 / SLC-500 control architectures. This page provides full technical specifications, compatible replacement models, application guidance, and sourcing information to help engineers and procurement teams make confident selection decisions.
Technical Specifications
| Manufacturer | Allen-Bradley (Rockwell Automation) |
| Part Number | 1788-CNC |
| Product Type | CNC Interface Card |
| Communication Protocol | ControlNet |
| Compatible Platforms | PLC-5, SLC-500, ControlLogix (via adapter) |
| Form Factor | Plug-in card module |
| Weight | Approx. 400 g |
| Operating Temperature | 0°C to 60°C |
| Certifications | UL, CE |
| Country of Origin | USA |
Note: Always verify specifications against the official Rockwell Automation product datasheet before final selection.
Compatible Replacement & Equivalent Models
The following models are commonly evaluated as replacements or equivalents for the 1788-CNC. Compatibility depends on your specific system configuration — consult your system integrator before substitution.
- 1788-CNCR — Redundant variant of the 1788-CNC; drop-in replacement for high-availability applications
- 1784-PCIC — ControlNet Interface Card for PCI bus; suitable for PC-based control environments
- 1784-KTCX15 — ControlNet communication card; legacy replacement option for PLC-5 systems
- 1756-CN2 — ControlLogix ControlNet bridge module; recommended upgrade path for modern architectures
- 1756-CN2R — Redundant ControlNet bridge for ControlLogix; preferred for mission-critical upgrades
Important: Firmware version, backplane slot requirements, and network topology must be verified before substitution. Contact support@konmask.com for compatibility assessment.
Why Choose the Original Model
- Proven field reliability — Thousands of installations across global manufacturing facilities
- Native ControlNet integration — No additional adapters or configuration overhead
- Full Rockwell Automation support — Covered under standard RA service agreements
- Deterministic communication — Guaranteed scan-time performance critical for CNC motion control
- Backward compatibility — Seamlessly integrates with existing PLC-5 and SLC-500 infrastructure
Typical Applications
- CNC machine tool control and motion coordination
- Automated manufacturing lines with ControlNet backbone
- Retrofit and modernization of legacy PLC-5 systems
- Multi-axis servo and spindle control integration
- Automotive body shop and assembly automation
- Precision machining centers in aerospace and defense
System Compatibility
- PLC Platform: Allen-Bradley PLC-5, SLC-500, ControlLogix (1756 series)
- Network: ControlNet (IEEE 802.3 based, coax or fiber)
- Software: RSLogix 5, RSLogix 500, RSLogix 5000 / Studio 5000
- HMI: PanelView, FactoryTalk View SE/ME
- SCADA: FactoryTalk Historian, Ignition (via OPC-UA bridge)
Selection Guide
Use the following criteria to determine whether the 1788-CNC or an alternative model best fits your application:
- Existing platform: If running PLC-5 or SLC-500, the 1788-CNC is the native choice. For ControlLogix, consider 1756-CN2.
- Redundancy requirement: Choose 1788-CNCR or 1756-CN2R for fault-tolerant systems.
- Network topology: Coax ControlNet → 1788-CNC / 1788-CNCR. Fiber ControlNet → consult Rockwell for fiber-specific modules.
- Budget vs. longevity: Original OEM units offer longest support lifecycle; compatible alternatives may reduce upfront cost for short-term projects.
- Spare parts strategy: For critical production lines, maintain at least one spare 1788-CNC on-site. Konmask.com offers stocking programs for high-volume buyers.
Quality Assurance & Sourcing
- All units sourced through verified industrial distribution channels
- Pre-shipment functional inspection and visual QC performed on every unit
- Genuine OEM units available alongside tested-refurbished options
- Traceability documentation available upon request (COC, test reports)
- Secure anti-static packaging with full ESD protection
- Global shipping with DHL / FedEx / UPS express options
How to Order
- Confirm your part number: 1788-CNC (or specify revision/firmware if known)
- Indicate quantity and required delivery timeline
- Submit your inquiry via email or phone — see contact details below
- Receive quotation within 1 business day
- Approve proforma invoice and arrange payment
- Shipment dispatched within 3–7 business days (express available)
For bulk orders (>5 units) or stocking agreements, request a volume discount quote.
Replacement & Compatibility FAQ
Q: Can the 1788-CNC be used in a ControlLogix chassis?
A: Not directly. The 1788-CNC is designed for PLC-5/SLC-500 architectures. For ControlLogix, use the 1756-CN2 or 1756-CN2R instead.
Q: Is the 1788-CNCR a direct drop-in replacement for the 1788-CNC?
A: Yes, in most configurations. The CNCR adds redundancy capability but is backward compatible with non-redundant setups.
Q: Do you supply refurbished units?
A: Yes. All refurbished units undergo functional testing and carry a 90-day warranty. Certificates of conformance are available.
Q: What is the lead time for new OEM units?
A: Stock availability varies. Contact us for real-time inventory status. Express sourcing from authorized distributors typically takes 5–15 business days.
Q: Can you help verify compatibility with my existing system?
A: Absolutely. Share your system configuration (PLC model, firmware version, network topology) and our technical team will advise.
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Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
