Product Details
The Honeywell 900R12-0101, also cataloged as the 900R12 I/O Slot Rack Assembly, operates as a dedicated hardware component for backplane power distribution and module interconnection within Honeywell HC900 control architecture.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 900R12-0101 |
| Brand | Honeywell |
| Origin | USA |
| Weight | 30.98 lbs (14.05 kg) |
| Dimensions | Standard 12-slot HC900 rack dimensions |
| Operating Temp | 0 deg C to 60 deg C |
| Power Consumption | Internal backplane bus rated at 2 A / 6 A (5 VDC / 24 VDC) |
| Capacity | 12 I/O module slots |
| Internal Bus Voltages | 5 VDC logic power, 24 VDC field auxiliary power |
| Product Category | PLCs/Machine Control / PLC Module/Rack |
Channel-to-Channel Isolation & Backplane Architecture
The 900R12-0101 rack chassis provides the primary backplane communication bus and power rails for up to 12 HC900 modules. Internal bus routing distributes 5 VDC logic power and 24 VDC auxiliary loop power across all slot connectors. Galvanic separation integrated into inserted analog input/output cards enforces channel-to-channel isolation and field-to-logic barrier protection, preventing ground potential shifts from propagating across the backplane bus during multi-drop 4-20 mA HART loop protocol executions.
Frequently Asked Questions
Q: What are the backplane current limits provided by the 900R12-0101 power bus rails?
A: The rack assembly backplane supports power supply distribution up to 2 A at 5 VDC logic level and 6 A at 24 VDC for auxiliary field I/O power.
Q: Can modules installed in the 12 slots be hot-swapped during operation?
A: Module replacement capabilities depend on the specific I/O module specifications and rack power supply state; proper shutdown procedures should be observed per HC900 hardware guidelines to prevent backplane bus transients.
Field Installation Guidelines
- Mount the rack chassis onto a flat metal panel or enclosure sub-panel using all designated mounting holes to establish a low-impedance ground connection.
- Connect a dedicated heavy-gauge copper conductor from the chassis grounding terminal directly to the central cabinet earth ground bar.
- Verify total current draw across all 12 slots does not exceed the maximum backplane power supply ratings of 2 A at 5 VDC and 6 A at 24 VDC.
- Maintain minimum clearance above and below the rack assembly to allow adequate thermal convection air flow across installed I/O modules.
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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