Description
The Honeywell 900RR0-0101 is a hardware chassis baseplate designed for the ControlEdge HC900 and legacy Hybrid Control Designer automation systems. It functions as a dedicated Redundant Control Processor Module (CPM) rack, housing dual redundant CPUs alongside dual redundant power supply units to ensure high-availability operation for critical process and safety loops.
Commercial Supply Status
- Condition: New Original (New Surplus), Factory Sealed
- Availability: In stock
- Lead Time: 1–3 business days
- Warranty: 12 months
- Pricing Note: Price subject to market conditions; contact us for a firm quote.
Field Engineering & Integration Notes
In high-availability configurations, the 900RR0-0101 acts as the primary hardware backplane for the control core. Unlike standard 4, 8, or 12-slot local I/O racks, this CPM baseplate does not host physical analog or digital process I/O modules. Instead, it dedicatedly maps the redundancy synchronization bus between the active and standby controller modules.
During a 2 AM commissioning cycle or hard failure recovery, ensure that both power supply slots are populated with matching units (such as dual 900P01-0301 AC supplies or dual 900P24-0301 DC supplies). Mixing different input power supply variants across the left and right power rails will cause diagnostic imbalances on the backplane control bus. When replacing a running CPM in a redundant pair, verify that the hardware address rotary switches on the replacement CPU accurately match the target slot configuration before sliding the module into the backplane, avoiding synchronization failures.
Technical Specifications
| Parameter | Value |
| Product Platform | ControlEdge HC900 / Hybrid Controller System |
| Rack Function | Redundant Control Processor Module (CPM) Rack |
| Model Number | 900RR0-0101 |
| Module Slot Capacity | Houses 2 x CPUs (Redundant Pair) and 2 x Power Supplies |
| Mechanical Height Profile | 137 mm (5.4 inches) |
| Mechanical Width Profile | 261.6 mm (10.3 inches) |
| Mechanical Depth Profile | 151.7 mm (6.0 inches) |
| Net Hardware Weight | 1,751 g (3.86 lbs) without modules installed |
| Mounting Orientation | Surface / Backplate mounting or direct DIN-rail installation |
| Ingress Enclosure Requirements | Must be panel-mounted inside an IP54 or NEMA 12 industrial cabinet |
| Environmental Approvals | CE, UL 61010-1, ATEX Zone 2 (Ex nA IIC T* Gc) |
System Backplane Architecture
The internal circuit tracing of the 900RR0-0101 routes specific system lines:
- Redundancy Link: High-speed parallel logic traces link the two CPU slots directly, managing real-time memory database replication between the primary and backup nodes.
- Power Sharing Bus: Parallel power routing ensures that if one power supply module loses its line feed or faults internally, the secondary unit takes over the complete backplane amperage load without dropping the CPUs or losing volatile application states.
Frequently Asked Questions
- Q: Can I plug a standard 900A01 analog input card into the 900RR0-0101 chassis?
- A: No. The 900RR0-0101 is built strictly for the main controller processors and power modules. Distributed process I/O modules must be mounted on remote expansion racks (such as the 900R08 or 900R12 series) and interfaced back to this CPM rack via Ethernet scanner modules.
- Q: What is the mechanical difference between the 900RR0-0101 and the newer 900RR0-0300?
- A: The
-0101and-0300variations primarily designate structural design iterations or updated internal bus component choices matching specific generations of HC900 hardware. While they fulfill identical roles in separating the active/standby loops, check the comprehensive Honeywell ControlEdge revision compatibility matrix to verify matching firmware limits before updating a system backplane.
- A: The
- Q: Is it safe to hot-swap a power supply module directly on this rack while the controller is live?
- A: Yes, provided that both power supplies were properly configured for redundant operations, both are receiving correct line voltage, and the “Power Status Module” indicates healthy parameters. The backplane isolates the power card connection rails to prevent voltage spikes from shutting down the processor during live maintenance swap-outs. Verify with the OEM datasheet before conducting field service.
Honeywell 05701-A-0302 Single-Channel Control Card Honeywell 05704-A-0144 System 57 Quad Control Card Honeywell FC-QPP-0002 – Quad Processor Pack Honeywell CC-PWRR01 – Redundant Power Supply Module
- A: Yes, provided that both power supplies were properly configured for redundant operations, both are receiving correct line voltage, and the “Power Status Module” indicates healthy parameters. The backplane isolates the power card connection rails to prevent voltage spikes from shutting down the processor during live maintenance swap-outs. Verify with the OEM datasheet before conducting field service.
