{"product_id":"bently-nevada-149986-02-3500-series-4-channel-relay-control-module","title":"Bently Nevada 149986-02 3500 Series 4-Channel Relay Control Module","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eConfigured for heavy industrial machinery protection, the \u003cstrong\u003eBently Nevada 149986-02\u003c\/strong\u003e provides dependable 4-channel relay control functionality within the 3500 rack system architecture. This module serves as a critical interface for executing hardware-based alarm outputs, system shutdowns, and safety interlocking schemes. By translating electronic alarm states into physical relay contact outputs, it safeguards high-value rotating assets such as steam turbines, centrifugal compressors, and large induction motors from catastrophic failure modes.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; padding-left: 1.5rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFour Independent Channels:\u003c\/strong\u003e Features four fully programmable single-pole, double-throw (SPDT) relay outputs that operate independently based on configured alarm logic.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConfigurable Logic:\u003c\/strong\u003e Relays can be configured for Normally Energized (NE) or Normally De-energized (NDE) operation to match fail-safe or process-safe plant topologies.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHardware-Level Execution:\u003c\/strong\u003e Bypasses software operating systems to execute protective trip commands directly via hardwired relay paths, minimizing response times.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBuilt-in Redundancy Support:\u003c\/strong\u003e Easily integrates into dual-redundant or triple-modular redundant (TMR) safety voting configurations (e.g., 2-out-of-3 logic).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReal-Time LED Indicators:\u003c\/strong\u003e Front panel status LEDs provide rapid visual diagnostics of active alarm states and system faults.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; padding-left: 1.5rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTurbine Trip Systems:\u003c\/strong\u003e Direct integration into emergency shutdown (ESD) circuits for gas, steam, and hydro turbines.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompressor Station Safety:\u003c\/strong\u003e Automates isolation and vent valves during surge or high-vibration excursions.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBalance of Plant Protection:\u003c\/strong\u003e Protects cooling tower fans, large water pumps, and gearboxes by triggering local annunciators or DCS alerts.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEmergency Interlocking:\u003c\/strong\u003e Interlocks generator breakers with mechanical trip conditions to prevent reverse-power damage.\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; text-align: left; border: 1px solid #e2e8f0;\"\u003e\n    \u003cthead\u003e\n      \u003ctr style=\"border-bottom: 2px solid #e2e8f0;\"\u003e\n        \u003cth style=\"padding: 0.75rem; font-weight: bold;\"\u003eParameter\u003c\/th\u003e\n        \u003cth style=\"padding: 0.75rem; 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: 0.75rem; font-weight: bold;\"\u003eManufacturer\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eBently Nevada\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003ePart Number\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e149986-02\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eModule Type\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eSpare 4-Channel Relay Control Module\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eCompatible System\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eBently Nevada 3500 Series Machinery Protection System\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eRelay Contact Type\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eSingle-Pole, Double-Throw (SPDT) \/ Form C\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eContact Current Rating\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e5 A at 120 Vac \/ 240 Vac (Resistive), 5 A at 24 Vdc\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eOperating Temperature\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e-30 to +65 degC\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eStorage Temperature\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e-40 to +85 degC\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eRelative Humidity\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e95% non-condensing\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003ePackaging Dimensions\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e2.5 cm x 25.8 cm x 12.0 cm\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eNet Weight\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.740kg;\"\u003e0.74 kg\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eShipping Weight (Calculated)\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e2.00 kg\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eCountry of Origin\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eUnited States (USA)\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\u003eAlternative Models \u0026amp; Compatibility\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eThe 149986-02 is the main circuit card assembly for the Bently Nevada 3500\/32 standard 4-Channel Relay Module. Note that this is functionally distinct from the 3500\/33 16-channel relay module. Ensure your 3500 Rack Configuration Software supports the specific card revision to prevent configuration mismatch errors during integration.\u003c\/p\u003e\n\n\u003ch4\u003eApplication Pitfalls \u0026amp; Engineering Notes\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eWhen switching highly inductive AC or DC loads (such as heavy solenoid valves or master trip coils), install external snubber circuits or suppression diodes directly across the load. Switching unsuppressed inductive loads will cause excessive contact arcing, drastically reducing the operational lifespan of the internal relay contacts and potentially inducing electromagnetic interference (EMI) back into the 3500 rack backplane.\u003c\/p\u003e\n\n\u003ch4\u003eCommissioning \u0026amp; Wiring Tips\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eHardware jumper settings on the 149986-02 board dictate whether the relays are Normally Energized (NE) or Normally De-energized (NDE). Ensure these hardware settings exactly match your software configuration database. A mismatch will cause the system to throw a configuration error and prevent the rack from entering \"Run\" mode.\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  \u003cstrong style=\"color: #9b2c2c;\"\u003eCRITICAL WARNING:\u003c\/strong\u003e Prior to inserting or extracting the module, verify that all external high-voltage source connections routed to the relay terminals are isolated, locked out, and tagged out. Failure to de-energize external field circuits can cause destructive electrical arcing and poses severe shock hazards to personnel.\n\u003c\/div\u003e\n\n\u003cdiv style=\"display: flex; flex-direction: column; gap: 1rem; color: #2d3748; margin-bottom: 1.5rem;\"\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start;\"\u003e\n    \u003cspan style=\"background-color: #2b6cb0; color: #ffffff; border-radius: 50%; min-width: 24px; height: 24px; display: inline-flex; align-items: center; justify-content: center; margin-right: 0.75rem; font-weight: bold;\"\u003e1\u003c\/span\u003e\n    \u003cp style=\"margin: 0;\"\u003eWear an ESD wrist strap connected to a verified earth ground point before removing the module from its anti-static shielding package.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start;\"\u003e\n    \u003cspan style=\"background-color: #2b6cb0; color: #ffffff; border-radius: 50%; min-width: 24px; height: 24px; display: inline-flex; align-items: center; justify-content: center; margin-right: 0.75rem; font-weight: bold;\"\u003e2\u003c\/span\u003e\n    \u003cp style=\"margin: 0;\"\u003eInspect the card's edge connector for dust, debris, or gold-plating contamination before installation.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start;\"\u003e\n    \u003cspan style=\"background-color: #2b6cb0; color: #ffffff; border-radius: 50%; min-width: 24px; height: 24px; display: inline-flex; align-items: center; justify-content: center; margin-right: 0.75rem; font-weight: bold;\"\u003e3\u003c\/span\u003e\n    \u003cp style=\"margin: 0;\"\u003eAlign the module card along the card guides of the designated slot in the 3500 chassis, sliding it backward until it seats firmly into the backplane connector.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start;\"\u003e\n    \u003cspan style=\"background-color: #2b6cb0; color: #ffffff; border-radius: 50%; min-width: 24px; height: 24px; display: inline-flex; align-items: center; justify-content: center; margin-right: 0.75rem; font-weight: bold;\"\u003e4\u003c\/span\u003e\n    \u003cp style=\"margin: 0;\"\u003eTighten the two chassis retaining screws on the front panel to secure the module and establish optimal frame grounding.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":52668312355179,"sku":"149986-02","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/149986-02-4ffdbpfp1vp_ee025e28-9a7e-471f-823f-7d34013bb55c.jpg?v=1765520891","url":"https:\/\/www.plcprotech.com\/id\/products\/bently-nevada-149986-02-3500-series-4-channel-relay-control-module","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}