Product Details
Configured for physical module mounting and redundant backplane bus communication in ControlEdge HC900 controller platforms, the Honeywell 900R08R-0300 (900R08R Redundant I/O Rack) provides direct physical/electrical execution. The hardware assembly features 8 dedicated I/O slots and dual power supply rails to maintain uninterrupted rack operations during power module maintenance. Utilizing an integrated backplane printed circuit board, the rack routes dual power channels and high-speed telemetry signals between inserted I/O cards and the central controller hardware.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 900R08R-0300 |
| Brand | Honeywell |
| Origin | USA |
| Weight | 4422 g (Shipping Weight: 5.5 kg) |
| Dimensions | 137 mm x 530.9 mm x 51.7 mm |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | Passive backplane with redundant power support |
| Module Slots | 8 I/O slots |
| Power Redundancy | Dual redundant power supply support |
| Backplane Type | Integrated power distribution and communications bus |
| Mounting Type | Rack or panel chassis mounting |
Channel-to-Channel Isolation & DCS Field Interfacing
The integrated backplane of the Honeywell 900R08R-0300 rack incorporates internal plane isolation to separate power distribution traces from sensitive data signal buses. High-density channel-to-channel isolation across inserted I/O modules prevents ground loops and high-voltage transients from corrupting measurement channels. This low-noise backplane infrastructure maintains analog signal integrity for modules processing 4-20 mA HART loop protocol field telemetry and millivolt sensor signals.
Frequently Asked Questions
Q: Does the 900R08R-0300 rack support replacing a power supply module while system power is active?
A: Yes, the dual power supply architecture enables Removal and Insertion Under Power (RIUP) of one power module while the redundant supply continues powering the 8 backplane I/O slots.
Q: How does the 900R08R-0300 chassis ground field wiring shields connected to the backplane?
A: Grounding is established via heavy-duty metallic chassis frame contacts that divert incoming shield transients to the main rack protective earth ground terminal.
Field Installation Guidelines
- Secure the metal rack frame to the enclosure backplate using four mounting screws torqued to standard panel specifications.
- Connect a low-impedance copper ground strap directly from the chassis grounding stud to the main cabinet protective earth (PE) bus.
- Leave at least 50 mm of unobstructed vertical clearance above and below the rack chassis to enable natural convective thermal dissipation.
- Verify proper seating and mechanical latching of both power supply modules into the redundant power slots before applying AC input voltage.
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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