The Honeywell 900RR0‑0001 Redundant CPU Rack provides the mechanical structure and backplane connectivity required for installing dual CPUs in HC900 redundant controller architectures.
Specifications
Manufacturer: Honeywell
Product Number: 900RR0‑0001
Product Type: Redundant CPU Rack Assembly
System Compatibility: Honeywell HC900 Hybrid Controller
Rack Function: Provides dual‑CPU mounting and backplane communication paths
Backplane Type: Integrated HC900 communication backplane
Power Distribution: Receives regulated DC power from HC900 power module
Isolation: Galvanic isolation between CPU and I/O segments
Construction: Industrial‑grade metal frame with reinforced connectors
Operating Temperature: 0°C to +60°C
Installation Method: Rack‑mounted within HC900 cabinet
Application: High‑availability process control, fault‑tolerant automation
Features
Redundant CPU Support: Provides dual‑slot architecture for active/standby CPU operation
Stable Backplane: Ensures reliable communication between CPUs and I/O modules
Industrial Durability: Rugged frame suitable for harsh plant environments
Easy Integration: Fully compatible with HC900 wiring and module layout
Maintenance‑Friendly: Allows CPU replacement without disturbing field wiring
High Availability: Supports continuous operation in mission‑critical systems
FAQ
What does the 900RR0‑0001 rack do: It provides mounting and backplane connectivity for redundant HC900 CPUs.
Does it support hot‑swap: CPU modules can be replaced with power applied; system impact depends on redundancy configuration.
Is it compatible with all HC900 CPUs: Yes, it supports HC900 redundant CPU models.
Does the rack draw power: The rack itself does not draw active current; it distributes regulated DC from the HC900 power module.
How does redundancy switchover occur: Switchover timing is controlled by CPU redundancy firmware; the rack provides the physical dual‑slot arrangement.
