Product Details
The Honeywell 900C72R-0000-42, also cataloged as the 900C72R Redundant CPU Processor Module, operates as a dedicated hardware component for high-availability process control and real-time logic execution within ControlEdge HC900 architectures. Installed in a redundant controller rack setup, the module provides direct physical and electrical execution for bumpless primary-to-reserve CPU failover. It synchronizes algorithm processing, database states, and backplane communication networks over dual dedicated inter-processor links.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 900C72R-0000-42 |
| Brand | Honeywell |
| Origin | USA |
| Weight | 0.45 kg (450 g) |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | Powered via 24 VDC rack backplane |
| Processor Type | Redundant Controller CPU (C70 Performance Class) |
| System Compatibility | ControlEdge HC900 Redundant Architectures |
| Network Interfaces | Dual Ethernet communication ports |
Channel-to-Channel Isolation & DCS Network Performance
The Honeywell 900C72R-0000-42 processor features internal galvanic isolation channels to shield central processing electronics from field-side voltage spikes and ground loop currents. Integrated backplane communication drivers exchange status words with local and remote I/O modules, maintaining isolation between internal CPU registers and field instruments operating over the 4-20 mA HART loop protocol. Dedicated redundancy links ensure database updates are mirrored across parallel processors without introducing signal attenuation or noise.
Frequently Asked Questions
Q: How does the 900C72R-0000-42 execute failover when a primary controller fault occurs?
A: Dual dedicated redundancy links continuously synchronize state memory between primary and backup CPUs, allowing the reserve 900C72R-0000-42 to assume complete execution control within a single scan cycle without process disruption.
Q: Can a standby 900C72R-0000-42 CPU module be replaced without interrupting active process execution?
A: Yes, Removal and Insertion Under Power (RIUP) is supported for the backup or standby CPU in a redundant 900RR0 rack, provided all electrostatic discharge (ESD) and safety isolation precautions are strictly followed.
Field Installation Guidelines
- Insert the 900C72R-0000-42 module into its assigned slot within a redundant HC900 rack frame, ensuring upper and lower mechanical latches engage fully with the backplane.
- Connect dedicated redundancy communication cables directly between the primary and secondary CPU modules prior to powering up the rack.
- Ensure a low-impedance ground conductor connects the rack frame to protective earth (PE) to enable signal shielding circuits.
- Maintain a minimum vertical clearance of 75 mm (3.0 inches) above and below the rack to maintain proper passive convective cooling.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
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