{"product_id":"bently-nevada-3500-32-01-00-3500-series-4-channel-relay-module","title":"Bently Nevada 3500\/32-01-00 3500 Series 4-Channel Relay Module","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eProviding programmable alarm relay outputs within the machinery protection framework, the \u003cstrong\u003eBently Nevada 3500\/32-01-00\u003c\/strong\u003e functions as a highly reliable 4-channel relay interface for the 3500 Machinery Protection System. This configuration comprises the \u003cstrong\u003e149986-02\u003c\/strong\u003e spare control module and the \u003cstrong\u003e125720-02\u003c\/strong\u003e spare relay output module. Each channel can be independently programmed with logic equations to trigger shutdowns or alert sequences based on status inputs from adjacent monitoring modules in the rack. The system relies on its integrated backplane connectivity to bypass external communication latencies, executing safety-critical operations with deterministic accuracy.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; padding-left: 1.5rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cli\u003eFour fully independent, software-programmable Single Pole Double Throw (SPDT) relay outputs.\u003c\/li\u003e\n  \u003cli\u003eModular design dividing logic processing (control module) and physical connection interfaces (I\/O module).\u003c\/li\u003e\n  \u003cli\u003eHighly configurable voting logic (AND, OR, and notary combinations) defined via the 3500 Rack Configuration Software.\u003c\/li\u003e\n  \u003cli\u003eOnboard LED indicators on the front panel display real-time OK and individual relay actuation statuses.\u003c\/li\u003e\n  \u003cli\u003eSupports normally energized (de-energize-to-trip) or normally de-energized (energize-to-trip) wiring configurations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIndustrial Applications\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; padding-left: 1.5rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cli\u003eTurbine emergency trip and overspeed shutdown systems.\u003c\/li\u003e\n  \u003cli\u003eReciprocating and centrifugal compressor safety interlocks.\u003c\/li\u003e\n  \u003cli\u003eLarge industrial fan and blower auxiliary control loops.\u003c\/li\u003e\n  \u003cli\u003eGenerator and motor winding temperature alarm management.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; width: 100%; margin-bottom: 1.5rem;\"\u003e\n  \u003ctable style=\"border-collapse: collapse; width: 100%; color: #2d3748; border: 1px solid #e2e8f0;\"\u003e\n    \u003cthead\u003e\n      \u003ctr style=\"border-bottom: 2px solid #cbd5e0;\"\u003e\n        \u003cth style=\"padding: 10px; text-align: left; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eParameter\u003c\/th\u003e\n        \u003cth style=\"padding: 10px; text-align: left; font-weight: bold;\"\u003eSpecification Value\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eManufacturer\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eBently Nevada\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eModel Number\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e3500\/32-01-00\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eComponent Cards\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e149986-02 (Control Module) + 125720-02 (I\/O Module)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eNumber of Channels\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e4 SPDT Relays\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eRelay Contact Rating (Resistive)\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e5 A @ 240 VAC (50\/60 Hz) \/ 5 A @ 30 VDC\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003ePower Consumption\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e5.8 Watts (typical)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eAgency Approvals Option\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e-00 (None)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eRelay Life Expectancy\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e100,000 cycles at rated load\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eOperating Temperature\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e-30 degC to +65 degC\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eCountry of Origin\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eUSA\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eShipping Weight (Calculated)\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e2.20 kg\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003ePackage Dimensions (Calculated)\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e29.2 cm x 15.4 cm x 10.2 cm\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eWiring Connection and Terminal Assignments\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; width: 100%; margin-bottom: 1.5rem;\"\u003e\n  \u003ctable style=\"border-collapse: collapse; width: 100%; color: #2d3748; border: 1px solid #e2e8f0;\"\u003e\n    \u003cthead\u003e\n      \u003ctr style=\"border-bottom: 2px solid #cbd5e0;\"\u003e\n        \u003cth style=\"padding: 10px; text-align: left; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eTerminal Designation\u003c\/th\u003e\n        \u003cth style=\"padding: 10px; text-align: left; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eRelay Channel\u003c\/th\u003e\n        \u003cth style=\"padding: 10px; text-align: left; font-weight: bold;\"\u003eFunction Assignment\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; border-right: 1px solid #e2e8f0;\"\u003eCh 1 - NC \/ COM \/ NO\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px; border-right: 1px solid #e2e8f0;\"\u003eRelay 1\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eNormally Closed \/ Common \/ Normally Open Contacts\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; border-right: 1px solid #e2e8f0;\"\u003eCh 2 - NC \/ COM \/ NO\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px; border-right: 1px solid #e2e8f0;\"\u003eRelay 2\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eNormally Closed \/ Common \/ Normally Open Contacts\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; border-right: 1px solid #e2e8f0;\"\u003eCh 3 - NC \/ COM \/ NO\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px; border-right: 1px solid #e2e8f0;\"\u003eRelay 3\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eNormally Closed \/ Common \/ Normally Open Contacts\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 10px; border-right: 1px solid #e2e8f0;\"\u003eCh 4 - NC \/ COM \/ NO\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px; border-right: 1px solid #e2e8f0;\"\u003eRelay 4\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eNormally Closed \/ Common \/ Normally Open Contacts\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eEmpirical Engineering Insights\u003c\/h3\u003e\n\u003ch4 style=\"color: #1a365d; margin-top: 1rem; margin-bottom: 0.5rem;\"\u003eAlternative Models \u0026amp; Compatibility\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eThe 149986-02 is the modernized, direct functional replacement for older legacy control card revisions such as the 125712-01. When swapping individual components rather than the entire 3500\/32 assembly, confirm that the firmware version programmed in the 149986-02 is compatible with the existing rack backplane and the version of your 3500 System Configuration Software.\u003c\/p\u003e\n\n\u003ch4 style=\"color: #1a365d; margin-top: 1rem; margin-bottom: 0.5rem;\"\u003eApplication Pitfalls \u0026amp; Engineering Notes\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eWhen switching inductive loads (such as heavy-duty interlock solenoids or intermediate auxiliary contactors), contact arc discharge can lead to contact welding or EMI generation that disrupts adjacent monitoring channels. Systems engineers must install external RC snubbers or flyback diodes across the inductive load to protect the relay contacts from high-voltage transient spikes.\u003c\/p\u003e\n\n\u003ch4 style=\"color: #1a365d; margin-top: 1rem; margin-bottom: 0.5rem;\"\u003eCommissioning \u0026amp; Wiring Tips\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1.5rem;\"\u003eEnsure to carefully audit the state of the relays during rack boot-up sequence. Configured as \"Normally Energized,\" these relays will transition states momentarily when power is applied to the rack. Critical shutdown lines must be interlocked or temporarily bypassed during power cycling to prevent spurious machinery trips.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cdiv style=\"background-color: #fff5f5; border-left: 4px solid #c53030; padding: 1rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cp style=\"margin: 0; font-weight: bold; color: #9b2c2c;\"\u003eCRITICAL WARNING\u003c\/p\u003e\n  \u003cp style=\"margin: 0.5rem 0 0 0; color: #2d3748; font-size: 0.95rem;\"\u003eDo not hot-swap the 125720-02 I\/O module if high voltage is present on any field terminals. Fully isolate and de-energize all connected relay lines before removing the I\/O module from the rear of the rack to avoid hazardous arcing or catastrophic personnel injury.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"display: flex; flex-direction: column; gap: 1rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; gap: 1rem;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; font-weight: bold; border-radius: 50%; min-width: 30px; height: 30px; display: flex; align-items: center; justify-content: center;\"\u003e1\u003c\/div\u003e\n    \u003cdiv style=\"color: #2d3748;\"\u003ePower down the 3500 rack and disconnect all field power connections linked to the 125720-02 terminal blocks.\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; gap: 1rem;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; font-weight: bold; border-radius: 50%; min-width: 30px; height: 30px; display: flex; align-items: center; justify-content: center;\"\u003e2\u003c\/div\u003e\n    \u003cdiv style=\"color: #2d3748;\"\u003eSlide the 149986-02 control card into the designated slot from the front of the rack until the ejector levers snap shut.\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; gap: 1rem;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; font-weight: bold; border-radius: 50%; min-width: 30px; height: 30px; display: flex; align-items: center; justify-content: center;\"\u003e3\u003c\/div\u003e\n    \u003cdiv style=\"color: #2d3748;\"\u003eAlign and slide the 125720-02 I\/O module into the corresponding slot on the rear of the rack, tightening both securing screws securely.\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; gap: 1rem;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; font-weight: bold; border-radius: 50%; min-width: 30px; height: 30px; display: flex; align-items: center; justify-content: center;\"\u003e4\u003c\/div\u003e\n    \u003cdiv style=\"color: #2d3748;\"\u003eConnect to the system using the 3500 Rack Configuration Software to assign channels and upload the logic validation profile.\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":52668299247979,"sku":"3500\/32-01-00 (125712-01 + 125720-01)","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/3500-32-01-00-2nbs4j5cudb_3befece7-41ca-45db-8702-8adee6bd53aa.jpg?v=1765520495","url":"https:\/\/www.plcprotech.com\/id\/products\/bently-nevada-3500-32-01-00-3500-series-4-channel-relay-module","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}