{"product_id":"900rr0-0300-honeywell-redundant-cpm-rack","title":"900RR0-0300 | Honeywell | Redundant CPM Rack","description":"\u003ch2\u003eHoneywell 900RR0-0300 Redundant CPM Rack\u003c\/h2\u003e\n\u003cp\u003eConfigured for redundant CPM mounting in HC900 control architecture, the \u003cstrong\u003eHoneywell 900RR0-0300\u003c\/strong\u003e (\u003cstrong\u003e900RR0-0300\u003c\/strong\u003e rack assembly) provides direct mechanical and backplane connectivity for dual‑processor operation.\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\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003ctd\u003e900RR0-0300\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eHoneywell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOrigin\u003c\/th\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003e1.751 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOperating Temp\u003c\/th\u003e\n\u003ctd\u003eExtended range −40 deg C to 70 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower Consumption\u003c\/th\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCore Performance Indicators\u003c\/th\u003e\n\u003ctd\u003eRedundant CPM mounting support; integrated HC900 backplane; rack‑level DC distribution\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003e4-20 mA HART Loop Protocol Behavior\u003c\/h3\u003e\n\u003cp\u003eAs a Honeywell process‑control hardware component, the rack maintains stable routing of CPM analog interface channels that operate on 4-20 mA HART loops. The backplane design preserves loop integrity by minimizing impedance variation across module slots, ensuring predictable analog signal transfer. Channel-to-channel isolation is maintained at the CPM module level, preventing loop interaction during high‑density I\/O configurations.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does the rack support hot‑swap of CPM modules?\u003c\/strong\u003e A: CPM modules can be removed with power applied, but the rack itself does not provide additional hot‑swap circuitry beyond standard HC900 backplane behavior. System impact depends on the redundancy configuration.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the backplane current load contribution of this rack?\u003c\/strong\u003e A: The rack does not introduce active current draw; it distributes regulated DC supplied by the HC900 power module. Total load is determined by installed CPM and I\/O modules.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How does redundancy switchover occur when using this rack?\u003c\/strong\u003e A: Switchover timing is governed by the CPM pair and the associated redundancy firmware. The rack provides the physical dual‑slot arrangement and backplane signal paths required for 2‑CPU operation.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMount the rack on a rigid panel surface to prevent vibration‑induced connector wear.\u003c\/li\u003e\n\u003cli\u003eMaintain proper grounding by bonding the rack frame to the control cabinet’s grounding bar.\u003c\/li\u003e\n\u003cli\u003eRoute analog and digital wiring separately to reduce noise coupling into CPM channels.\u003c\/li\u003e\n\u003cli\u003eEnsure backplane connectors are fully seated before applying power; partial engagement can cause intermittent CPM communication.\u003c\/li\u003e\n\u003cli\u003eFollow Honeywell HC900 wiring practices for shield termination, typically grounding shields at the cabinet entry point.\u003c\/li\u003e\n\u003cli\u003eAllow clearance for module removal; avoid cable strain that may obstruct CPM extraction during maintenance.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":47907594174654,"sku":"900RR0-0300","price":620.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1145\/5422\/files\/900R12-0101_2.jpg?v=1782372232","url":"https:\/\/www.autooiltech.com\/ar\/products\/900rr0-0300-honeywell-redundant-cpm-rack","provider":"AutoOilTech Limited","version":"1.0","type":"link"}