{"product_id":"900r08r-0300-honeywell-8-slot-i-o-rack","title":"900R08R-0300 | Honeywell | 8-Slot I\/O Rack","description":"\u003cp\u003eThe \u003cstrong\u003eHoneywell 900R08R-0300\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e900R08-0300\u003c\/strong\u003e 8-slot I\/O rack, operates as a dedicated hardware component for module mounting, redundant power distribution, and backplane bus routing within ControlEdge HC900 process control architectures.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e900R08R-0300\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eHoneywell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e5.00 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eHeight: 137 mm (5.4 in) x Width: 530.9 mm (20.9 in) x Depth: 151.7 mm (6.0 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 deg C to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eRedundant 24 VDC Power Input Support\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSlot Capacity\u003c\/td\u003e\n\u003ctd\u003e8 I\/O module slots\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Type\u003c\/td\u003e\n\u003ctd\u003eDIN rail or panel mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHumidity Range\u003c\/td\u003e\n\u003ctd\u003e10% to 90% RH (non-condensing)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eHoneywell DCS Process Control and Loop Isolation\u003c\/h3\u003e\n\u003cp\u003eIntegrated within Honeywell ControlEdge HC900 distributed control environments, the 900R08R-0300 backplane rack provides a deterministic communication and power bus for up to 8 modular I\/O cards. While individual field instruments interface via 4-20 mA HART loop protocol or FOUNDATION Fieldbus segments to transmit process variables, the rack backplane manages high-speed data transfer and power distribution across all populated slots. Built-in channel-to-channel isolation boundaries and robust bus shielding prevent ground loops and high-frequency electromagnetic interference from corrupting critical signals across industrial cabinets.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Can individual I\/O modules be hot-swapped while the 900R08R-0300 rack is powered and active?\u003c\/p\u003e\n\u003cp\u003eA: Hot-swapping modules under live backplane power is supported on designated slots, provided specific I\/O card types are rated for live insertion to prevent bus communication disruption.\u003c\/p\u003e\n\u003cp\u003eQ: How does the backplane handle redundant 24 VDC power supply inputs?\u003c\/p\u003e\n\u003cp\u003eA: The dual power inputs utilize diode-OR configuration circuitry to provide seamless, uninterrupted switchover if the primary 24 VDC source experiences a voltage sag or failure.\u003c\/p\u003e\n\u003cp\u003eQ: What grounding requirements must be met to ensure backplane EMI immunity?\u003c\/p\u003e\n\u003cp\u003eA: The rack chassis must be securely bonded to the main cabinet ground bus using a low-impedance copper braid to maintain electromagnetic compatibility and surge protection limits.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMount the 8-slot rack securely onto a flat panel or structural DIN rail using all designated mounting holes to withstand heavy industrial vibration profiles.\u003c\/li\u003e\n\u003cli\u003eEnsure clear vertical and horizontal spacing around the chassis to allow adequate convective cooling across the 0 deg C to 60 deg C operating temperature range.\u003c\/li\u003e\n\u003cli\u003eConnect the primary and redundant 24 VDC power feeds to the dedicated terminal blocks, verifying correct polarity before energizing the system.\u003c\/li\u003e\n\u003cli\u003eInspect all backplane connector pins for dust or foreign particulate contamination prior to inserting individual I\/O modules.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":67893393752360,"sku":"900R08R-0300","price":315.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0827\/6266\/2184\/files\/900R08-0300_18a60da4-3011-484e-85c8-0e3b79b54fd4.png?v=1791966055","url":"https:\/\/www.powerdcs.com\/products\/900r08r-0300-honeywell-8-slot-i-o-rack","provider":"Power DCS Parts Limited","version":"1.0","type":"link"}