{"product_id":"bently-nevada-125720-01-4-channel-relay-i-o-module","title":"Bently Nevada 125720-01 4-Channel Relay I\/O Module","description":"\u003ch2\u003eBently Nevada 125720-01 4-Channel Relay I\/O Module\u003c\/h2\u003e\n\u003cp\u003eConfigured for programmatic trip output routing in 3500 machinery protection systems, the \u003cstrong\u003eBently Nevada 125720-01\u003c\/strong\u003e (\u003cstrong\u003e125720-01\u003c\/strong\u003e Relay I\/O Module) provides direct physical\/electrical execution. It interfaces directly with the main 4-Channel Relay control card from the rear of the rack to execute dry-contact output switching based on system-wide alarm states.\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\u003e125720-01\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eBently Nevada\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.5 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e2.5 cm x 11.0 cm x 24.0 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-20 to +65 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e+5 VDC, +\/-15 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e5 to 15 W typical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTariff Code\u003c\/td\u003e\n\u003ctd\u003e8537101190\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eRear Relay I\/O Card\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContact Rating\u003c\/td\u003e\n\u003ctd\u003e2 to 5 A at 30 VDC \/ 250 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation Voltage\u003c\/td\u003e\n\u003ctd\u003e1500 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHumidity Range\u003c\/td\u003e\n\u003ctd\u003e5 to 95% RH, non-condensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eAlarm Drive Logic and Signal Suppression Matrix\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eBently Nevada 125720-01\u003c\/strong\u003e coordinates with the front-plane monitoring architecture to execute precise AND\/OR voting configurations across independent channels. The underlying logic engine samples Alert, Danger, and Not-OK hardware flags from any monitor module resident on the shared backplane bus. To prevent accidental machinery shutdown during transient rotor dynamics shifts or scheduled calibration procedures, the relay channels process status changes deterministically. This protection loop maintains output relay contact stability against electrical anomalies, ensuring that structural trip execution occurs only when verified sensor inputs violate configured voting logic boundaries.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Can the 125720-01 I\/O module be used as a standalone relay module?\u003c\/p\u003e\n\u003cp\u003eA: No. The 125720-01 is a rear-facing I\/O module that must be installed directly behind a corresponding 3500\/32 4-Channel Relay main monitor module to function.\u003c\/p\u003e\n\u003cp\u003eQ: Does an internal \"Not-OK\" monitor status automatically actuate the relays?\u003c\/p\u003e\n\u003cp\u003eA: Actuation depends entirely on configuration. The Alarm Drive Logic can be programmed via software to either include or bypass \"Not-OK\" hardware statuses, letting the engineer define whether a sensor fault should trigger a system trip or a system alert.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSlot Alignment Constraints:\u003c\/strong\u003e Power down the corresponding rack section before inserting the module. The 125720-01 must be positioned in the rear slot directly opposing the front 4-Channel Relay mainboard to ensure proper backplane connector pinning.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWiring Separation Practices:\u003c\/strong\u003e Route high-voltage terminal wiring (up to 250 VAC) away from low-voltage coaxial or proximity sensor transducer cables inside the wireways to avoid inductive noise coupling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShield Grounding Control:\u003c\/strong\u003e Connect external device wiring screens to the dedicated rack ground lug. Do not create multi-point ground paths, which can generate stray currents and interfere with adjacent machinery diagnostics.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":44317974593635,"sku":null,"price":180.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0549\/2775\/3315\/files\/125720-01-1.jpg?v=1783308020","url":"https:\/\/precisemodule.com\/products\/bently-nevada-125720-01-4-channel-relay-i-o-module","provider":"Precise Module Ltd.","version":"1.0","type":"link"}