900R12-0300 Honeywell HC900 Series 12-Slot I/O Racks
Manufacturer: Honeywell
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Part Number: 900R12-0300
Condition：New with Original Package
Product Type: I/O Racks
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Country of Origin: USA
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Honeywell 900R12-0300 HC900 Series 12-Slot Controller Rack
The Honeywell 900R12-0300 serves as the primary 900R12 12-slot I/O Rack utilized to execute backplane bus communication velocity and power distribution across Honeywell HC900 and ControlEdge HC900 platforms. The passive structural chassis manages parallel logic traces and high-density voltage distribution lines, enabling real-time data exchange between mounted peripheral modules and the central processing architecture.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 900R12-0300 (also designated as 900R12R-0300) |
| Brand | Honeywell |
| Origin | USA |
| Weight | 4-5 kg |
| Dimensions | 137 x 72.6 x 151 mm per slot dimension profile |
| Operating Temp | -20 to +60 deg C |
| Storage Temp | -40 to +85 deg C |
| Power Consumption | Passive chassis backplane assembly |
| Number of Slots | 12 active I/O slots |
| Supported Modules | Analog I/O, Digital I/O, Communication modules |
| Power Supply Compatibility | Honeywell 900P01-0501, 900P02-0201 power modules |
| Mounting | Standard rack-mount installation |
| Humidity Range | 5% - 95% non-condensing |
| Certifications | CE, UL, CSA |
Backplane Bus Communication Velocity and Density Scaling
The chassis incorporates an integrated multi-layer copper backplane bus that maintains deterministic communication execution times across all 12 expansion slots. The hardware plane isolates low-level signal paths from high-current power distribution traces, preventing electromagnetic cross-talk during concurrent digital switching and analog sampling routines. The high pin-density connector sockets support continuous hot-swap insertion, clamping voltage sag during live module installation to protect system availability.
Frequently Asked Questions
Q: How does the 900R12-0300 chassis manage power distribution to individual I/O modules?
A: The integrated backplane connects directly to compatible Honeywell 900P01-0501 or 900P02-0201 power modules, splitting the regulated low-voltage rails evenly across all 12 peripheral slots.
Q: What are the functional restrictions regarding hot-swapping modules in this rack?
A: The backplane pins feature staggered physical lengths to ensure ground contacts engage first and break last, allowing engineers to replace analog, digital, or communication cards while the rack remains under electrical load.
Q: Is special slot allocation required when mixing digital and analog modules?
A: No, the universal routing design of the backplane communication bus permits arbitrary placement of any certified Honeywell HC900 series module within any of the 12 available slots.
Field Installation Guidelines
- Grounding Execution: Secure a dedicated, low-impedance copper grounding strap from the rack chassis ground terminal directly to the enclosure master instrument ground bar to maximize common-mode noise rejection.
- Heat Dissipation: Allow a minimum of 50 mm clearance space above, below, and on the sides of the rack assembly within the cabinet to maintain natural convection airflow and prevent thermal concentration.
- Module Seating Alignment: Align the module housings strictly with the physical guide tracks before applying linear force to engage the backplane pins, and tighten all mechanical retention screws to lock the cards in place.